NAME

       podman-unshare - Run a command inside of a modified user namespace

SYNOPSIS

       podman unshare [options] [command]

DESCRIPTION

       Launches  a  process  (by  default, $SHELL) in a new user namespace. The user namespace is
       configured so that the invoking user's UID and primary GID appear to be UID 0 and  GID  0,
       respectively.   Any  ranges which match that user and group in /etc/subuid and /etc/subgid
       are also mapped in as themselves with  the  help  of  the  newuidmap(1)  and  newgidmap(1)
       helpers.

       podman  unshare  is  useful  for  troubleshooting unprivileged operations and for manually
       clearing storage and other data related to images and containers.

       It is also useful to use the podman mount command.  If an unprivileged user wants to mount
       and  work  with  a  container, then they need to execute podman unshare.  Executing podman
       mount fails for unprivileged users unless the user is  running  inside  a  podman  unshare
       session.

       The unshare session defines two environment variables:

              • CONTAINERS_GRAPHROOT: the path to the persistent container's data.

              • CONTAINERS_RUNROOT: the path to the volatile container's data.

       IMPORTANT: This command is not available with the remote Podman client.

OPTIONS

   --help, -h
       Print usage statement

   --rootless-netns
       Join  the  rootless  network  namespace  used  for  netavark networking. It can be used to
       connect to a rootless container via IP address (bridge networking). This is otherwise  not
       possible from the host network namespace.

Exit Codes

       The  exit code from podman unshare gives information about why the container failed to run
       or why it exited.  When podman unshare commands exit with a non-zero code, the exit  codes
       follow the chroot standard, see below:

       125 The error is with podman itself

       $ podman unshare --foo; echo $?
       Error: unknown flag: --foo
       125

       126 Executing a contained command and the command cannot be invoked

       $ podman unshare /etc; echo $?
       Error: fork/exec /etc: permission denied
       126

       127 Executing a contained command and the command cannot be found

       $ podman unshare foo; echo $?
       Error: fork/exec /usr/bin/bogus: no such file or directory
       127

       Exit code contained command exit code

       $ podman unshare /bin/sh -c 'exit 3'; echo $?
       3

EXAMPLE

       $ podman unshare id
       uid=0(root) gid=0(root) groups=0(root),65534(nobody)

       $ podman unshare cat /proc/self/uid_map /proc/self/gid_map
                0       1000          1
                1      10000      65536
                0       1000          1
                1      10000      65536

       $ podman unshare --rootless-netns ip addr
       1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
           link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
           inet 127.0.0.1/8 scope host lo
              valid_lft forever preferred_lft forever
           inet6 ::1/128 scope host
              valid_lft forever preferred_lft forever
       2: tap0: <BROADCAST,UP,LOWER_UP> mtu 65520 qdisc fq_codel state UNKNOWN group default qlen 1000
           link/ether aa:8c:0b:73:98:f6 brd ff:ff:ff:ff:ff:ff
           inet 10.0.2.100/24 brd 10.0.2.255 scope global tap0
              valid_lft forever preferred_lft forever
           inet6 fd00::a88c:bff:fe73:98f6/64 scope global dynamic mngtmpaddr
              valid_lft 86389sec preferred_lft 14389sec
           inet6 fe80::a88c:bff:fe73:98f6/64 scope link
              valid_lft forever preferred_lft forever

SEE ALSO

       podman(1), podman-mount(1), namespaces(7), newuidmap(1), newgidmap(1), user_namespaces(7)

                                                                                podman-unshare(1)