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Last active May 4, 2022
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$ docker --version
Docker version 19.03.15, build 99e3ed8919
$ cat /etc/issue
Debian GNU/Linux 9 \n \l
$ dpkg -l | grep libseccomp
ii libseccomp2:amd64 2.3.1-2.1 amd64 high level interface to Linux seccomp filter
$ docker run --rm -it ubuntu:22.04
root@b5cb14060ae4:/# ls -al
ls: cannot access 'srv': Operation not permitted
ls: cannot access 'sbin': Operation not permitted
ls: cannot access 'lib32': Operation not permitted
ls: cannot access 'run': Operation not permitted
ls: cannot access 'lib': Operation not permitted
ls: cannot access 'var': Operation not permitted
ls: cannot access 'lib64': Operation not permitted
ls: cannot access '..': Operation not permitted
ls: cannot access 'usr': Operation not permitted
ls: cannot access '.': Operation not permitted
ls: cannot access 'sys': Operation not permitted
ls: cannot access 'media': Operation not permitted
ls: cannot access 'home': Operation not permitted
ls: cannot access 'boot': Operation not permitted
ls: cannot access 'tmp': Operation not permitted
ls: cannot access 'mnt': Operation not permitted
ls: cannot access 'opt': Operation not permitted
ls: cannot access 'bin': Operation not permitted
ls: cannot access 'etc': Operation not permitted
ls: cannot access 'root': Operation not permitted
ls: cannot access 'proc': Operation not permitted
ls: cannot access 'libx32': Operation not permitted
ls: cannot access 'dev': Operation not permitted
ls: cannot access '.dockerenv': Operation not permitted
total 0
d????????? ? ? ? ? ? .
d????????? ? ? ? ? ? ..
-????????? ? ? ? ? ? .dockerenv
l????????? ? ? ? ? ? bin
d????????? ? ? ? ? ? boot
d????????? ? ? ? ? ? dev
d????????? ? ? ? ? ? etc
d????????? ? ? ? ? ? home
l????????? ? ? ? ? ? lib
l????????? ? ? ? ? ? lib32
l????????? ? ? ? ? ? lib64
l????????? ? ? ? ? ? libx32
d????????? ? ? ? ? ? media
d????????? ? ? ? ? ? mnt
d????????? ? ? ? ? ? opt
d????????? ? ? ? ? ? proc
d????????? ? ? ? ? ? root
d????????? ? ? ? ? ? run
l????????? ? ? ? ? ? sbin
d????????? ? ? ? ? ? srv
d????????? ? ? ? ? ? sys
d????????? ? ? ? ? ? tmp
d????????? ? ? ? ? ? usr
d????????? ? ? ? ? ? var
root@b5cb14060ae4:/# apt update
Get:1 http://archive.ubuntu.com/ubuntu jammy InRelease [270 kB]
Get:2 http://archive.ubuntu.com/ubuntu jammy-updates InRelease [109 kB]
Get:3 http://archive.ubuntu.com/ubuntu jammy-backports InRelease [90.7 kB]
Get:4 http://security.ubuntu.com/ubuntu jammy-security InRelease [110 kB]
Err:1 http://archive.ubuntu.com/ubuntu jammy InRelease
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 871920D1991BC93C
Err:2 http://archive.ubuntu.com/ubuntu jammy-updates InRelease
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 871920D1991BC93C
Err:3 http://archive.ubuntu.com/ubuntu jammy-backports InRelease
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 871920D1991BC93C
Err:4 http://security.ubuntu.com/ubuntu jammy-security InRelease
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 871920D1991BC93C
Reading package lists... Done
W: http://archive.ubuntu.com/ubuntu/dists/jammy/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/ubuntu-keyring-2012-cdimage.gpg are ignored as the file is not readable by user '_apt' executing apt-key.
W: http://archive.ubuntu.com/ubuntu/dists/jammy/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/ubuntu-keyring-2018-archive.gpg are ignored as the file is not readable by user '_apt' executing apt-key.
W: GPG error: http://archive.ubuntu.com/ubuntu jammy InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 871920D1991BC93C
E: The repository 'http://archive.ubuntu.com/ubuntu jammy InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: http://archive.ubuntu.com/ubuntu/dists/jammy-updates/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/ubuntu-keyring-2012-cdimage.gpg are ignored as the file is not readable by user '_apt' executing apt-key.
W: http://archive.ubuntu.com/ubuntu/dists/jammy-updates/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/ubuntu-keyring-2018-archive.gpg are ignored as the file is not readable by user '_apt' executing apt-key.
W: GPG error: http://archive.ubuntu.com/ubuntu jammy-updates InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 871920D1991BC93C
E: The repository 'http://archive.ubuntu.com/ubuntu jammy-updates InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: http://archive.ubuntu.com/ubuntu/dists/jammy-backports/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/ubuntu-keyring-2012-cdimage.gpg are ignored as the file is not readable by user '_apt' executing apt-key.
W: http://archive.ubuntu.com/ubuntu/dists/jammy-backports/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/ubuntu-keyring-2018-archive.gpg are ignored as the file is not readable by user '_apt' executing apt-key.
W: GPG error: http://archive.ubuntu.com/ubuntu jammy-backports InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 871920D1991BC93C
E: The repository 'http://archive.ubuntu.com/ubuntu jammy-backports InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: http://security.ubuntu.com/ubuntu/dists/jammy-security/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/ubuntu-keyring-2012-cdimage.gpg are ignored as the file is not readable by user '_apt' executing apt-key.
W: http://security.ubuntu.com/ubuntu/dists/jammy-security/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/ubuntu-keyring-2018-archive.gpg are ignored as the file is not readable by user '_apt' executing apt-key.
W: GPG error: http://security.ubuntu.com/ubuntu jammy-security InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 871920D1991BC93C
E: The repository 'http://security.ubuntu.com/ubuntu jammy-security InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: Problem executing scripts APT::Update::Post-Invoke 'rm -f /var/cache/apt/archives/*.deb /var/cache/apt/archives/partial/*.deb /var/cache/apt/*.bin || true'
E: Sub-process returned an error code
$ apt install libseccomp2
$ dpkg -l | grep libseccomp
ii libseccomp2:amd64 2.3.1-2.1+deb9u1 amd64 high level interface to Linux seccomp filter
$ docker run --rm -it ubuntu:22.04
root@ce59f6da5330:/# ls -al
total 56
drwxr-xr-x 1 root root 4096 May 4 20:36 .
drwxr-xr-x 1 root root 4096 May 4 20:36 ..
-rwxr-xr-x 1 root root 0 May 4 20:36 .dockerenv
lrwxrwxrwx 1 root root 7 Apr 28 12:01 bin -> usr/bin
drwxr-xr-x 2 root root 4096 Apr 18 10:28 boot
drwxr-xr-x 5 root root 360 May 4 20:36 dev
drwxr-xr-x 1 root root 4096 May 4 20:36 etc
drwxr-xr-x 2 root root 4096 Apr 18 10:28 home
lrwxrwxrwx 1 root root 7 Apr 28 12:01 lib -> usr/lib
lrwxrwxrwx 1 root root 9 Apr 28 12:01 lib32 -> usr/lib32
lrwxrwxrwx 1 root root 9 Apr 28 12:01 lib64 -> usr/lib64
lrwxrwxrwx 1 root root 10 Apr 28 12:01 libx32 -> usr/libx32
drwxr-xr-x 2 root root 4096 Apr 28 12:01 media
drwxr-xr-x 2 root root 4096 Apr 28 12:01 mnt
drwxr-xr-x 2 root root 4096 Apr 28 12:01 opt
dr-xr-xr-x 146 root root 0 May 4 20:36 proc
drwx------ 2 root root 4096 Apr 28 12:04 root
drwxr-xr-x 5 root root 4096 Apr 28 12:04 run
lrwxrwxrwx 1 root root 8 Apr 28 12:01 sbin -> usr/sbin
drwxr-xr-x 2 root root 4096 Apr 28 12:01 srv
dr-xr-xr-x 13 root root 0 May 3 05:16 sys
drwxrwxrwt 2 root root 4096 Apr 28 12:04 tmp
drwxr-xr-x 14 root root 4096 Apr 28 12:01 usr
drwxr-xr-x 11 root root 4096 Apr 28 12:04 var
root@6d3f97699b52:/# apt update
Get:1 http://archive.ubuntu.com/ubuntu jammy InRelease [270 kB]
Get:2 http://security.ubuntu.com/ubuntu jammy-security InRelease [110 kB]
Get:3 http://archive.ubuntu.com/ubuntu jammy-updates InRelease [109 kB]
Get:4 http://archive.ubuntu.com/ubuntu jammy-backports InRelease [90.7 kB]
Err:1 http://archive.ubuntu.com/ubuntu jammy InRelease
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 871920D1991BC93C
Err:3 http://archive.ubuntu.com/ubuntu jammy-updates InRelease
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 871920D1991BC93C
Err:4 http://archive.ubuntu.com/ubuntu jammy-backports InRelease
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 871920D1991BC93C
Err:2 http://security.ubuntu.com/ubuntu jammy-security InRelease
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 871920D1991BC93C
Reading package lists... Done
W: http://archive.ubuntu.com/ubuntu/dists/jammy/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/ubuntu-keyring-2012-cdimage.gpg are ignored as the file is not readable by user '_apt' executing apt-key.
W: http://archive.ubuntu.com/ubuntu/dists/jammy/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/ubuntu-keyring-2018-archive.gpg are ignored as the file is not readable by user '_apt' executing apt-key.
W: GPG error: http://archive.ubuntu.com/ubuntu jammy InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 871920D1991BC93C
E: The repository 'http://archive.ubuntu.com/ubuntu jammy InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: http://archive.ubuntu.com/ubuntu/dists/jammy-updates/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/ubuntu-keyring-2012-cdimage.gpg are ignored as the file is not readable by user '_apt' executing apt-key.
W: http://archive.ubuntu.com/ubuntu/dists/jammy-updates/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/ubuntu-keyring-2018-archive.gpg are ignored as the file is not readable by user '_apt' executing apt-key.
W: GPG error: http://archive.ubuntu.com/ubuntu jammy-updates InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 871920D1991BC93C
E: The repository 'http://archive.ubuntu.com/ubuntu jammy-updates InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: http://archive.ubuntu.com/ubuntu/dists/jammy-backports/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/ubuntu-keyring-2012-cdimage.gpg are ignored as the file is not readable by user '_apt' executing apt-key.
W: http://archive.ubuntu.com/ubuntu/dists/jammy-backports/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/ubuntu-keyring-2018-archive.gpg are ignored as the file is not readable by user '_apt' executing apt-key.
W: GPG error: http://archive.ubuntu.com/ubuntu jammy-backports InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 871920D1991BC93C
E: The repository 'http://archive.ubuntu.com/ubuntu jammy-backports InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: http://security.ubuntu.com/ubuntu/dists/jammy-security/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/ubuntu-keyring-2012-cdimage.gpg are ignored as the file is not readable by user '_apt' executing apt-key.
W: http://security.ubuntu.com/ubuntu/dists/jammy-security/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/ubuntu-keyring-2018-archive.gpg are ignored as the file is not readable by user '_apt' executing apt-key.
W: GPG error: http://security.ubuntu.com/ubuntu jammy-security InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 871920D1991BC93C
E: The repository 'http://security.ubuntu.com/ubuntu jammy-security InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: Problem executing scripts APT::Update::Post-Invoke 'rm -f /var/cache/apt/archives/*.deb /var/cache/apt/archives/partial/*.deb /var/cache/apt/*.bin || true'
E: Sub-process returned an error code
root@6d3f97699b52:/# su - _apt -s /bin/bash -c 'od -c /etc/apt/trusted.gpg.d/ubuntu-keyring-2012-cdimage.gpg | head -1'
su: warning: cannot change directory to /nonexistent: No such file or directory
0000000 231 002 \r 004 O 255 216 h 001 020 \0 273 244 242 273 362
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