Linux manual pages Section 1  

Name

unshare — run program with some namespaces unshared from parent

Synopsis

unshare [options] program [arguments]

DESCRIPTION

Unshares specified namespaces from parent process and then executes specified program. Unshareable namespaces are:

mount namespace

mounting and unmounting filesystems will not affect rest of the system (CLONE_NEWNS flag),

UTS namespace

setting hostname, domainname will not affect rest of the system (CLONE_NEWUTS flag),

IPC namespace

process will have indpendent namespace for System V message queues, semaphore sets and shared memory segments (CLONE_NEWIPC flag),

network namespace

process will have independent IPv4 and IPv6 stacks, IP routing tables, firewall rules, the /proc/net and /sys/class/net directory trees, sockets etc. (CLONE_NEWNET flag).

See the clone(2) for exact semantics of the flags.

OPTIONS

−h, −−help

Print a help message,

−m, −−mount

Unshare the mount namespace,

−u, −−uts

Unshare the UTC namespace,

−i, −−ipc

Unshare the IPC namespace,

−n, −−net

Unshare the network namespace.

SEE ALSO

unshare(2), clone(2)

BUGS

None known so far.

AUTHOR

Mikhail Gusarov <[email protected]>

AVAILABILITY

The unshare command is part of the util-linux-ng package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng/.


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