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 output mode ( --tree or --list) and 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.
 
-T, --tree rel
Use tree-like output format. If process is given as rel, print process tree(s) in each name space. This is default when --tree is not specified. If parent is given, print tree(s) constructed by the parent/child relationship. If owner is given, print tree(s) constructed by the owner/owned relationship. owner is used as default when rel is omitted.
 
-h, --help
Display help text and exit.
 
-V, --version
Print version and exit.

AUTHORS

Karel <[email protected]>Zak

SEE ALSO

nsenter(1), unshare(1), clone(2), namespaces(7), ioctl_ns(2), ip-netns(8)

REPORTING BUGS

For bug reports, use the issue tracker at <https://github.com/util-linux/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/>.

Recommended readings

Pages related to lsns you should read also:
clone(2) ioctl_ns(2) ip-netns(8) namespaces(7) nsenter(1) unshare(1)

Questions & Answers

Helpful answers and articles about lsns you may found on these sites:
Stack Overflow Server Fault Super User Unix & Linux Ask Ubuntu Network Engineering DevOps Raspberry Pi Webmasters Google Search