lsns

LSNS(8)                      System Administration                     LSNS(8)

NAME
       lsns - list namespaces

SYNOPSIS
       lsns [options] namespace

DESCRIPTION
       lsns lists information about all the currently accessible namespaces or
       about the given namespace. The namespace identifier is an inode number.

       The default output is subject to change. So whenever possible, you
       should avoid using default outputs in your scripts. Always explicitly
       define expected columns by using the --output option together with a
       columns list in environments where a stable output is required.

       The NSFS column, printed when net is specified for the --type option,
       is special; it uses multi-line cells. Use the option --nowrap to switch
       to ","-separated single-line representation.

       Note that lsns reads information directly from the /proc filesystem and
       for non-root users it may return incomplete information. The current
       /proc filesystem may be unshared and affected by a PID namespace (see
       unshare --mount-proc for more details). lsns is not able to see
       persistent namespaces without processes where the namespace instance is
       held by a bind mount to /proc/pid/ns/type.

OPTIONS
       -J, --json
           Use JSON output format.

       -l, --list
           Use list output format.

       -n, --noheadings
           Do not print a header line.

       -o, --output list
           Specify which output columns to print. Use --help to get a list of
           all supported columns.

           The default list of columns may be extended if list is specified in
           the format +list (e.g., lsns -o +PATH).

       --output-all
           Output all available columns.

       -p, --task PID
           Display only the namespaces held by the process with this PID.

       -r, --raw
           Use the raw output format.

       -t, --type type
           Display the specified type of namespaces only. The supported types
           are mnt, net, ipc, user, pid, uts, cgroup and time. This option may
           be given more than once.

       -u, --notruncate
           Do not truncate text in columns.

       -W, --nowrap
           Do not use multi-line text in columns.

       -V, --version
           Display version information and exit.

       -h, --help
           Display help text and exit.

AUTHORS
       Karel Zak <kzak@redhat.com>

SEE ALSO
       nsenter(1), unshare(1), clone(2), namespaces(7), ioctl_ns(2)

REPORTING BUGS
       For bug reports, use the issue tracker at
       https://github.com/karelzak/util-linux/issues.

AVAILABILITY
       The lsns command is part of the util-linux package which can be
       downloaded from Linux Kernel Archive
       <https://www.kernel.org/pub/linux/utils/util-linux/>.

util-linux 2.37.2                 2021-08-16                           LSNS(8)