LSNS(8)                     System Administration                    LSNS(8)

NAME         top

       lsns - list namespaces

SYNOPSIS         top

       lsns [options] [namespace]

DESCRIPTION         top

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

       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

       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         top

       -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).

       -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 and cgroup.  This
              option may be given more than once.

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

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

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

AUTHORS         top

       Karel Zak <>

SEE ALSO         top

       nsenter(1), unshare(1), clone(2), namespaces(7)

AVAILABILITY         top

       The lsns command is part of the util-linux package and is available

COLOPHON         top

       This page is part of the util-linux (a random collection of Linux
       utilities) project.  Information about the project can be found at 
       ⟨⟩.  If you have a
       bug report for this manual page, send it to  This page was obtained from the
       project's upstream Git repository 
       ⟨git://⟩ on
       2016-12-10.  If you discover any rendering problems in this HTML ver‐
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       ual page), send a mail to

util-linux                      December 2015                        LSNS(8)