*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_.
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.