Analyze Container Images and their Associated Licenses
Base Container Image
This product supports below listed Official Container Base Images as the common base image layer for building images.
See the license information for details on Debian licenses and software package types. See also the Debian notes on the Debian official images.
As with all container images, the Debian container image can contain other software (such as bash
, glibc
, zlib
, and others from the base distribution, along with any direct or indirect dependencies of the primary software included in the built image) that might be subjected to other licenses.
The following links provide auto-detected license information for the Debian, amazonlinux2 official images:
For example, you can find information about the artifacts of the debian:bookworm-slim official image.
Additional Software Packages
Building images often installs additional software packages (fetched from the official distribution software repositories, from other user added repositories, or from specific locations), in addition to the packages already provided by the base image. You can inspect the Dockerfiles to identify these additional packages.
For example, when you read the TIBCO BWCE Dockerfile, you see a list of packages that are installed in the image, as specified in the Dockerfile. Each such specified package can, in turn, install other software packages as dependencies.
Note: There are different ways to extract the list of installed packages and other installed artifacts. Providing detailed instructions on software license analysis specialized tools is outside the scope of this document. Retrieving information on software artifacts other than software packages installed with the package manager tools is also outside the scope of this document. The following sections provide basic examples using standard container and package management tools.
Manually Retrieve Installed Packages Information
The document lists Debian and AmazonLinux as examples. You can use similar commands for other base image layers as well.
Debian
You can use the command dpkg-query
to retrieve the full list of installed packages in a container image.
Example: To retrieve the list of installed packages in the debian:bookworm-slim
image:
$ docker run --rm debian:bookworm-slim dpkg-query -l
Sample Result:
Unable to find image 'debian:bookworm-slim' locally bookworm-slim: Pulling from library/debian 1f7ce2fa46ab: Pull complete Digest: sha256:2bc5c236e9b262645a323e9088dfa3bb1ecb16cc75811daf40a23a824d665be9 Status: Downloaded newer image for debian:bookworm-slim Desired=Unknown/Install/Remove/Purge/Hold | Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad) ||/ Name Version Architecture Description +++-=======================-==================-============-======================================================================== ii adduser 3.134 all add and remove users and groups ii apt 2.6.1 amd64 commandline package manager ii base-files 12.4+deb12u2 amd64 Debian base system miscellaneous files ii base-passwd 3.6.1 amd64 Debian base system master password and group files ii bash 5.2.15-2+b2 amd64 GNU Bourne Again SHell ii bsdutils 1:2.38.1-5+b1 amd64 basic utilities from 4.4BSD-Lite ii coreutils 9.1-1 amd64 GNU core utilities ii dash 0.5.12-2 amd64 POSIX-compliant shell ii debconf 1.5.82 all Debian configuration management system ii debian-archive-keyring 2023.3+deb12u1 all GnuPG archive keys of the Debian archive ...
AmazonLinux
You can use the command rpm to retrieve the full list of installed packages in a container image.
Example: To retrieve the list of installed packages in the amazonlunux:2
image:
docker run --rm amazonlinux:2 rpm -qa --queryformat "%{NAME},%{VERSION} ,%{LICENSE}\n"
Sample Result
ncurses-base,6.0 ,MIT basesystem,10.0 ,Public Domain glibc,2.26 ,LGPLv2+ and LGPLv2+ with exceptions and GPLv2+ libstdc++,7.3.1 ,GPLv3+ and GPLv3+ with exceptions and GPLv2+ with exceptions and LGPLv2+ and BSD info,5.1 ,GPLv3+ xz-libs,5.2.2 ,LGPLv2+ popt,1.13 ,MIT chkconfig,1.7.4 ,GPLv2 libffi,3.0.13 ,MIT and Public Domain libxml2,2.9.1 ,MIT libcrypt,2.26 ,LGPLv2+ and LGPLv2+ with exceptions and GPLv2+ libnghttp2,1.41.0 ,MIT libdb-utils,5.3.21 ,BSD and LGPLv2 and Sleepycat findutils,4.5.11 ,GPLv3+ libidn2,2.3.0 ,(GPLv2+ or LGPLv3+) and GPLv3+ p11-kit-trust,0.23.22 ,BSD openssl-libs,1.0.2k ,OpenSSL libssh2,1.4.3 ,BSD cyrus-sasl-lib,2.1.26 ,BSD with advertising shared-mime-info,1.8 ,GPLv2+ nss-sysinit,3.90.0 ,MPLv2.0 curl,8.3.0 ,curl python-urlgrabber,3.10 ,LGPLv2+ python2-rpm,4.11.3 ,GPLv2+ yum-plugin-priorities,1.1.31 ,GPLv2+ vim-minimal,9.0.2081 ,Vim AND LGPL-2.1-or-later AND MIT AND GPL-1.0-only AND (GPL-2.0-only OR Vim) AND Apache-2.0 AND BSD-2-Clause AND BSD-3-Clause AND GPL-2.0-or-later AND GPL-3.0-or-later AND OPUBL-1.0 tzdata,2023c ,Public Domain filesystem,3.2 ,Public Domain glibc-minimal-langpack,2.26 ,LGPLv2+ and LGPLv2+ with exceptions and GPLv2+ libsepol,2.5 ,LGPLv2+ zlib,1.2.7 ,zlib and Boost libdb,5.3.21 ,BSD and LGPLv2 and Sleepycat libcap,2.54 ,BSD or GPLv2 libgpg-error,1.12 ,LGPLv2+ libacl,2.2.51 ,LGPLv2+ libassuan,2.1.0 ,LGPLv2+ and GPLv3+ file-libs,5.11 ,BSD expat,2.1.0 ,MIT gdbm,1.13 ,GPLv3+ gawk,4.0.2 ,GPLv3+ and GPL and LGPLv3+ and LGPL and BSD libunistring,0.9.3 ,LGPLv3+ libtasn1,4.10 ,GPLv3+ and LGPLv2+ coreutils,8.22 ,GPLv3+ python,2.7.18 ,Python pyxattr,0.5.1 ,LGPLv2+ glib2,2.56.1 ,LGPLv2+ nss,3.90.0 ,MPLv2.0 rpm-libs,4.11.3 ,GPLv2+ and LGPLv2+ with exceptions python-pycurl,7.19.0 ,LGPLv2+ or MIT rpm-build-libs,4.11.3 ,GPLv2+ and LGPLv2+ with exceptions yum,3.4.3 ,GPLv2+ libmetalink,0.1.3 ,MIT vim-data,9.0.2081 ,Vim AND LGPL-2.1-or-later AND MIT AND GPL-1.0-only AND (GPL-2.0-only OR Vim) AND Apache-2.0 AND BSD-2-Clause AND BSD-3-Clause AND GPL-2.0-or-later AND GPL-3.0-or-later AND OPUBL-1.0 setup,2.8.71 ,Public Domain glibc-common,2.26 ,LGPLv2+ and LGPLv2+ with exceptions and GPLv2+ bash,4.2.46 ,GPLv3+ libselinux,2.5 ,Public Domain nss-util,3.90.0 ,MPLv2.0 readline,6.2 ,GPLv3+ elfutils-libelf,0.176 ,GPLv2+ or LGPLv3+ libattr,2.4.46 ,LGPLv2+ p11-kit,0.23.22 ,BSD grep,2.20 ,GPLv3+ libuuid,2.30.2 ,BSD libgcrypt,1.5.3 ,LGPLv2+ nss-softokn,3.90.0 ,MPLv2.0 diffutils,3.3 ,GPLv3+ ncurses,6.0 ,MIT libverto,0.2.5 ,MIT python-libs,2.7.18 ,Python pyliblzma,0.5.3 ,LGPLv3+ libmount,2.30.2 ,LGPLv2+ nss-pem,1.0.3 ,MPLv1.1 libcurl,8.3.0 ,curl openldap,2.4.44 ,OpenLDAP gnupg2,2.0.22 ,GPLv3+ pygpgme,0.3 ,LGPLv2+ amazon-linux-extras,2.0.3 ,GPLv2 gpg-pubkey,c87f5b1a ,pubkey system-release,2 ,GPLv2 libgcc,7.3.1 ,GPLv3+ and GPLv3+ with exceptions and GPLv2+ with exceptions and LGPLv2+ and BSD ncurses-libs,6.0 ,MIT pcre,8.32 ,BSD nspr,4.35.0 ,MPLv2.0 bzip2-libs,1.0.6 ,BSD lua,5.1.4 ,MIT sqlite,3.7.17 ,Public Domain libcom_err,1.42.9 ,MIT sed,4.2.2 ,GPLv3+ keyutils-libs,1.5.8 ,GPLv2+ and LGPLv2+ pinentry,0.8.1 ,GPLv2+ nss-softokn-freebl,3.90.0 ,MPLv2.0 cpio,2.12 ,GPLv3+ gmp,6.0.0 ,LGPLv3+ or GPLv2+ ca-certificates,2023.2.62 ,Public Domain krb5-libs,1.15.1 ,MIT python-iniparse,0.4 ,MIT libblkid,2.30.2 ,LGPLv2+ yum-metadata-parser,1.1.4 ,GPLv2 nss-tools,3.90.0 ,MPLv2.0 rpm,4.11.3 ,GPLv2+ pth,2.0.7 ,LGPLv2+ gpgme,1.3.2 ,LGPLv2+ yum-plugin-ovl,1.1.31 ,GPLv2+ glibc-langpack-en,2.26 ,LGPLv2+ and LGPLv2+ with exceptions and GPLv2+
Manually Retrieve Installed Packages Licenses
Debian
You can use the command dpkg
to retrieve the license for any installed package.
Example: To retrieve the license information for the installed package apt
:
$ docker run --rm debian:bookworm-slim sh -c 'cat `dpkg -L apt | grep copyright`'
Sample Result:
Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/ Upstream-Name: apt Upstream-Contact: APT Development Team <deity@lists.debian.org> Source: https://salsa.debian.org/apt-team/apt Comment: APT is an old software with lots of contributors over its lifetime. This file is a best effort to document the statements of copyright and licenses as stated in the file, but is not a complete representation of all copyright holders - those have been lost to times. . Several bits of apt-pkg/contrib have had public domain dedications but contributions from authors in countries not recognizing a public domain concept. We believe that these contributions have been done in good faith, and we treat them as if they had been made under the GPL-2+ as we believe some contributors may have missed these facts and the overall license statement for the project has always been GPL-2+, so we cannot be sure that contributors meant to grant additional permissions. . Translation files are considered to generally be GPL-2+, but they also include strings used by methods/rsh.cc which appears to be GPL-2. As the translations are split into separate domains later on, these strings are not loaded by library users outside of apt (they are in the 'apt' translation domain). . The apt-pkg/contrib/fileutl.cc file states "RunScripts()" is "GPLv2". We believe that this was not meant to exclude later versions of the GPL, as that would have changed the overall project license. Files: * Copyright: 1997-1999 Jason Gunthorpe and others 2018, 2019 Canonical Ltd 2009, 2010, 2015, 2016 Julian Andres Klode <jak@debian.org> 1998, Ben Gertzfield <che@debian.org> 2002-2019 Free Software Foundation, Inc. 2003, 2004, 2005, 2009, 2010, 2012 Software in the Public Interest 2002-2003 Lars Bahner <bahner@debian.org> 2003-2004 Axel Bojer <axelb@skolelinux.no> 2004 Klaus Ade Johnstad <klaus@skolelinux.no> 2004 Bjorn Steensrud <bjornst@powertech.no> 2003, 2005-2010 Hans Fredrik Nordhaug <hans@nordhaug.priv.no> 2016, 2018 Petter Reinholdtsen <pere@hungry.com> 2009 Rosetta Contributors and Canonical Ltd 2009 2013 Debian L10n Turkish 2013 2013-2018 Mert Dirik <mertdirik@gmail.com> 2004 Krzysztof Fiertek <akfedux@megapolis.pl> 2000-2004, 2010, 2012 Robert Luberda <robert@debian.org> 2000-2017 Debian Italian l10n team <debian-l10n-italian@lists.debian.org> 2003-2017 Debian Japanese List <debian-japanese@lists.debian.org> 2000-2018 Debian French l10n team <debian-l10n-french@lists.debian.org> 1997 Manoj Srivastava 1997 Tom Lees 2014 Anthony Towns License: GPL-2+ Files: methods/rsh.cc Copyright: 2000 Ben Collins <bcollins@debian.org> License: GPL-2 Comment: This file stated: Licensed under the GNU General Public License v2 [no exception clauses] . We believe that this was intended to be not a statement against future versions of the GPL, but meant to exclude the Qt license exception in place in APT until that time. . We received permission from Ben in 2021 to relicense under GPL-2+, contributions from Adam Heath and Daniel Hartwig may still have to be considered GPL-2 for the time being. . Other contributions are GPL-2+ Files: CMake/FindBerkeley.cmake Copyright: 2006, Alexander Dymo, <adymo@kdevelop.org> 2016, Julian Andres Klode <jak@debian.org> License: BSD-3-clause Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: . 1. Redistributions of source code must retain the copyright notice, this list of conditions and the following disclaimer. 2. Redistributions in binary form must reproduce the copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. 3. The name of the author may not be used to endorse or promote products derived from this software without specific prior written permission. . THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. Files: CMake/Documentation.cmake CMake/FindLFS.cmake Copyright: 2016 Julian Andres Klode <jak@debian.org> License: Expat Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: . The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. . THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. License: GPL-2 This package is free software; you can redistribute it and/or modify it under the terms version 2 of the GNU General Public License as published by the Free Software Foundation. . This package is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. . You should have received a copy of the GNU General Public License along with this program. If not, see <https://www.gnu.org/licenses/> Comment: On Debian systems, the complete text of the GNU General Public License version 2 can be found in "/usr/share/common-licenses/GPL-2". License: GPL-2+ This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. . This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. . You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. Comment: On Debian systems, the complete text of the GNU General Public License version 2 can be found in "/usr/share/common-licenses/GPL-2".
AmazonLinux
You can use the cat
command to retrieve the license for any installed package.
Example: To retrieve the license information for the installed package yum
:
docker run --rm amazonlinux:2 cat /usr/share/doc/yum-3.4.3/COPYING
Sample Result
GNU GENERAL PUBLIC LICENSE Version 2, June 1991 Copyright (C) 1989, 1991 Free Software Foundation, Inc. 675 Mass Ave, Cambridge, MA 02139, USA Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. Preamble The licenses for most software are designed to take away your freedom to share and change it. By contrast, the GNU General Public License is intended to guarantee your freedom to share and change free software--to make sure the software is free for all its users. This General Public License applies to most of the Free Software Foundation's software and to any other program whose authors commit to using it. (Some other Free Software Foundation software is covered by the GNU Library General Public License instead.) You can apply it to your programs, too. When we speak of free software, we are referring to freedom, not price. Our General Public Licenses are designed to make sure that you have the freedom to distribute copies of free software (and charge for this service if you wish), that you receive source code or can get it if you want it, that you can change the software or use pieces of it in new free programs; and that you know you can do these things. To protect your rights, we need to make restrictions that forbid anyone to deny you these rights or to ask you to surrender the rights. These restrictions translate to certain responsibilities for you if you distribute copies of the software, or if you modify it. For example, if you distribute copies of such a program, whether gratis or for a fee, you must give the recipients all the rights that you have. You must make sure that they, too, receive or can get the source code. And you must show them these terms so they know their rights. We protect your rights with two steps: (1) copyright the software, and (2) offer you this license which gives you legal permission to copy, distribute and/or modify the software. Also, for each author's protection and ours, we want to make certain that everyone understands that there is no warranty for this free software. If the software is modified by someone else and passed on, we want its recipients to know that what they have is not the original, so that any problems introduced by others will not reflect on the original authors' reputations. Finally, any free program is threatened constantly by software patents. We wish to avoid the danger that redistributors of a free program will individually obtain patent licenses, in effect making the program proprietary. To prevent this, we have made it clear that any patent must be licensed for everyone's free use or not licensed at all. The precise terms and conditions for copying, distribution and modification follow. GNU GENERAL PUBLIC LICENSE TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION 0. This License applies to any program or other work which contains a notice placed by the copyright holder saying it may be distributed under the terms of this General Public License. The "Program", below, refers to any such program or work, and a "work based on the Program" means either the Program or any derivative work under copyright law: that is to say, a work containing the Program or a portion of it, either verbatim or with modifications and/or translated into another language. (Hereinafter, translation is included without limitation in the term "modification".) Each licensee is addressed as "you". Activities other than copying, distribution and modification are not covered by this License; they are outside its scope. The act of running the Program is not restricted, and the output from the Program is covered only if its contents constitute a work based on the Program (independent of having been made by running the Program). Whether that is true depends on what the Program does. 1. You may copy and distribute verbatim copies of the Program's source code as you receive it, in any medium, provided that you conspicuously and appropriately publish on each copy an appropriate copyright notice and disclaimer of warranty; keep intact all the notices that refer to this License and to the absence of any warranty; and give any other recipients of the Program a copy of this License along with the Program. You may charge a fee for the physical act of transferring a copy, and you may at your option offer warranty protection in exchange for a fee. 2. You may modify your copy or copies of the Program or any portion of it, thus forming a work based on the Program, and copy and distribute such modifications or work under the terms of Section 1 above, provided that you also meet all of these conditions: a) You must cause the modified files to carry prominent notices stating that you changed the files and the date of any change. b) You must cause any work that you distribute or publish, that in whole or in part contains or is derived from the Program or any part thereof, to be licensed as a whole at no charge to all third parties under the terms of this License. c) If the modified program normally reads commands interactively when run, you must cause it, when started running for such interactive use in the most ordinary way, to print or display an announcement including an appropriate copyright notice and a notice that there is no warranty (or else, saying that you provide a warranty) and that users may redistribute the program under these conditions, and telling the user how to view a copy of this License. (Exception: if the Program itself is interactive but does not normally print such an announcement, your work based on the Program is not required to print an announcement.) These requirements apply to the modified work as a whole. If identifiable sections of that work are not derived from the Program, and can be reasonably considered independent and separate works in themselves, then this License, and its terms, do not apply to those sections when you distribute them as separate works. But when you distribute the same sections as part of a whole which is a work based on the Program, the distribution of the whole must be on the terms of this License, whose permissions for other licensees extend to the entire whole, and thus to each and every part regardless of who wrote it. Thus, it is not the intent of this section to claim rights or contest your rights to work written entirely by you; rather, the intent is to exercise the right to control the distribution of derivative or collective works based on the Program. In addition, mere aggregation of another work not based on the Program with the Program (or with a work based on the Program) on a volume of a storage or distribution medium does not bring the other work under the scope of this License. 3. You may copy and distribute the Program (or a work based on it, under Section 2) in object code or executable form under the terms of Sections 1 and 2 above provided that you also do one of the following: a) Accompany it with the complete corresponding machine-readable source code, which must be distributed under the terms of Sections 1 and 2 above on a medium customarily used for software interchange; or, b) Accompany it with a written offer, valid for at least three years, to give any third party, for a charge no more than your cost of physically performing source distribution, a complete machine-readable copy of the corresponding source code, to be distributed under the terms of Sections 1 and 2 above on a medium customarily used for software interchange; or, c) Accompany it with the information you received as to the offer to distribute corresponding source code. (This alternative is allowed only for noncommercial distribution and only if you received the program in object code or executable form with such an offer, in accord with Subsection b above.) The source code for a work means the preferred form of the work for making modifications to it. For an executable work, complete source code means all the source code for all modules it contains, plus any associated interface definition files, plus the scripts used to control compilation and installation of the executable. However, as a special exception, the source code distributed need not include anything that is normally distributed (in either source or binary form) with the major components (compiler, kernel, and so on) of the operating system on which the executable runs, unless that component itself accompanies the executable. If distribution of executable or object code is made by offering access to copy from a designated place, then offering equivalent access to copy the source code from the same place counts as distribution of the source code, even though third parties are not compelled to copy the source along with the object code. 4. You may not copy, modify, sublicense, or distribute the Program except as expressly provided under this License. Any attempt otherwise to copy, modify, sublicense or distribute the Program is void, and will automatically terminate your rights under this License. However, parties who have received copies, or rights, from you under this License will not have their licenses terminated so long as such parties remain in full compliance. 5. You are not required to accept this License, since you have not signed it. However, nothing else grants you permission to modify or distribute the Program or its derivative works. These actions are prohibited by law if you do not accept this License. Therefore, by modifying or distributing the Program (or any work based on the Program), you indicate your acceptance of this License to do so, and all its terms and conditions for copying, distributing or modifying the Program or works based on it. 6. Each time you redistribute the Program (or any work based on the Program), the recipient automatically receives a license from the original licensor to copy, distribute or modify the Program subject to these terms and conditions. You may not impose any further restrictions on the recipients' exercise of the rights granted herein. You are not responsible for enforcing compliance by third parties to this License. 7. If, as a consequence of a court judgment or allegation of patent infringement or for any other reason (not limited to patent issues), conditions are imposed on you (whether by court order, agreement or otherwise) that contradict the conditions of this License, they do not excuse you from the conditions of this License. If you cannot distribute so as to satisfy simultaneously your obligations under this License and any other pertinent obligations, then as a consequence you may not distribute the Program at all. For example, if a patent license would not permit royalty-free redistribution of the Program by all those who receive copies directly or indirectly through you, then the only way you could satisfy both it and this License would be to refrain entirely from distribution of the Program. If any portion of this section is held invalid or unenforceable under any particular circumstance, the balance of the section is intended to apply and the section as a whole is intended to apply in other circumstances. It is not the purpose of this section to induce you to infringe any patents or other property right claims or to contest validity of any such claims; this section has the sole purpose of protecting the integrity of the free software distribution system, which is implemented by public license practices. Many people have made generous contributions to the wide range of software distributed through that system in reliance on consistent application of that system; it is up to the author/donor to decide if he or she is willing to distribute software through any other system and a licensee cannot impose that choice. This section is intended to make thoroughly clear what is believed to be a consequence of the rest of this License. 8. If the distribution and/or use of the Program is restricted in certain countries either by patents or by copyrighted interfaces, the original copyright holder who places the Program under this License may add an explicit geographical distribution limitation excluding those countries, so that distribution is permitted only in or among countries not thus excluded. In such case, this License incorporates the limitation as if written in the body of this License. 9. The Free Software Foundation may publish revised and/or new versions of the General Public License from time to time. Such new versions will be similar in spirit to the present version, but may differ in detail to address new problems or concerns. Each version is given a distinguishing version number. If the Program specifies a version number of this License which applies to it and "any later version", you have the option of following the terms and conditions either of that version or of any later version published by the Free Software Foundation. If the Program does not specify a version number of this License, you may choose any version ever published by the Free Software Foundation. 10. If you wish to incorporate parts of the Program into other free programs whose distribution conditions are different, write to the author to ask for permission. For software which is copyrighted by the Free Software Foundation, write to the Free Software Foundation; we sometimes make exceptions for this. Our decision will be guided by the two goals of preserving the free status of all derivatives of our free software and of promoting the sharing and reuse of software generally. NO WARRANTY 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. END OF TERMS AND CONDITIONS How to Apply These Terms to Your New Programs If you develop a new program, and you want it to be of the greatest possible use to the public, the best way to achieve this is to make it free software which everyone can redistribute and change under these terms. To do so, attach the following notices to the program. It is safest to attach them to the start of each source file to most effectively convey the exclusion of warranty; and each file should have at least the "copyright" line and a pointer to where the full notice is found. <one line to give the program's name and a brief idea of what it does.> Copyright (C) 19yy <name of author> This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. Also add information on how to contact you by electronic and paper mail. If the program is interactive, make it output a short notice like this when it starts in an interactive mode: Gnomovision version 69, Copyright (C) 19yy name of author Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. This is free software, and you are welcome to redistribute it under certain conditions; type `show c' for details. The hypothetical commands `show w' and `show c' should show the appropriate parts of the General Public License. Of course, the commands you use may be called something other than `show w' and `show c'; they could even be mouse-clicks or menu items--whatever suits your program. You should also get your employer (if you work as a programmer) or your school, if any, to sign a "copyright disclaimer" for the program, if necessary. Here is a sample; alter the names: Yoyodyne, Inc., hereby disclaims all copyright interest in the program `Gnomovision' (which makes passes at compilers) written by James Hacker. <signature of Ty Coon>, 1 April 1989 Ty Coon, President of Vice This General Public License does not permit incorporating your program into proprietary programs. If your program is a subroutine library, you may consider it more useful to permit linking proprietary applications with the library. If this is what you want to do, use the GNU Library General Public License instead of this License.
Manually Retrieve Installed Packages Sources
Debian
You can use the command apt-get
to retrieve the source for any installed package.
Example: To retrieve the source for the installed package apt
:
$ docker run --rm debian:bookworm-slim cat /etc/apt/sources.list.d/debian.sources
Sample Result:
Types: deb # http://snapshot.debian.org/archive/debian/20231120T000000Z URIs: http://deb.debian.org/debian Suites: bookworm bookworm-updates Components: main Signed-By: /usr/share/keyrings/debian-archive-keyring.gpg Types: deb # http://snapshot.debian.org/archive/debian-security/20231120T000000Z URIs: http://deb.debian.org/debian-security Suites: bookworm-security Components: main Signed-By: /usr/share/keyrings/debian-archive-keyring.gpg
AmazonLinux
You can use the command repolist
to retrieve the repositories for any installed package.
Example: To retrieve the repositories for the installed package yum
:
docker run --rm amazonlinux:2 yum -v repolist all
Sample Result:
Loading "ovl" plugin Loading "priorities" plugin Config time: 0.008 rpmdb time: 0.000 ovl: Copying up (0) files from OverlayFS lower layer Yum version: 3.4.3 Setting up Package Sacks pkgsack time: 0.003 Repo-id : amzn2-core/2/aarch64 Repo-name : Amazon Linux 2 core repository Repo-status : enabled Repo-revision: 1699579172 Repo-updated : Fri Nov 10 01:19:32 2023 Repo-pkgs : 23912 Repo-size : 42 G Repo-mirrors : http://amazonlinux.default.amazonaws.com/2/core/latest/aarch64/mirror.list Repo-baseurl : https://cdn.amazonlinux.com/2/core/2.0/aarch64/6201a485818f2648562de7dd0e7d6a9177b7fb621c2a29b67b1878c2620de790/ Repo-expire : 300 second(s) (last: Wed Nov 22 06:14:26 2023) Filter : read-only:present Repo-filename: /etc/yum.repos.d/amzn2-core.repo Repo-id : amzn2-core-debuginfo/2/aarch64 Repo-name : Amazon Linux 2 core repository - debuginfo packages Repo-status : disabled Repo-mirrors : http://amazonlinux.default.amazonaws.com/2/core/latest/debuginfo/aarch64/mirror.list Repo-expire : 300 second(s) (last: Unknown) Filter : read-only:present Repo-filename: /etc/yum.repos.d/amzn2-core.repo Repo-id : amzn2-core-source/2 Repo-name : Amazon Linux 2 core repository - source packages Repo-status : disabled Repo-mirrors : http://amazonlinux.default.amazonaws.com/2/core/latest/SRPMS/mirror.list Repo-expire : 300 second(s) (last: Unknown) Filter : read-only:present Repo-filename: /etc/yum.repos.d/amzn2-core.repo repolist: 23912
Manually Retrieve Installed Files
You can use the command docker
to extract the contents of a container for further inspection. Here we show 2 common methods to extract the image contents without running the container.
Method 1: Using a temporal container image to extract the files
Create a temporal container image based on the image you want to inspect, and export its whole filesystem (or parts of it).
Example:
-
Create a temporal container image called
temp-container
, based on theunknown-image:latest
image:docker create --name temp-container unknown-image:latest
-
Extract the whole container image filesystem as a TAR file:
docker export temp-container > temp-container.tar
-
or, if you want to list only the included files:
docker export temp-container | tar t > temp-container-files.txt
This method is a direct way to extract the image's final filesystem. It provides a composite view of a container instance's filesystem.
Note: This is the fastest way to list the included files or extract individual files.
Method 2: Extract the container image layers as a set of layers
Create a TAR file with all the individual image layers that compose the final container image.
Example:
Use the command docker image save
to create a TAR file containing all the container image layers:
docker image save unknown-image:latest > temp-image.tar
The TAR file includes a manifest.json
file, which describes the image's layers and a set of separate directories containing the content of each of the individual layers.
This method produces an archive that exposes the container image format, not the container instances created from it. It provides a layered view of the container image.
Layered View vs Composite View
The following diagram illustrates the differences between the layered view and the composite view of a container image.
-
For more information on the docker command arguments, see the Docker CLI documentation.
-
For more information on the container image format, see the OCI image format specification.