LXC-UNSHARE(1)LXC-UNSHARE(1)NAMElxc-unshare - Run a task in a new set of namespaces.
SYNOPSISlxc-unshare-s namespaces [ -u user ] [ -H hostname ] [ -i ifname ]
[ -d ] [ -M ] command
DESCRIPTIONlxc-unshare can be used to run a task in a cloned set of namespaces.
This command is mainly provided for testing purposes. Despite its
name, it always uses clone rather than unshare to create the new task
with fresh namespaces. Apart from testing kernel regressions this
should make no difference.
OPTIONS-s namespaces
Specify the namespaces to attach to, as a pipe-separated list,
e.g. NETWORK|IPC. Allowed values are MOUNT, PID, UTSNAME, IPC,
USER and NETWORK. This allows one to change the context of the
process to e.g. the network namespace of the container while
retaining the other namespaces as those of the host.
-u user
Specify a userid which the new task should become.
-H hostname
Set the hostname in the new container. Only allowed if the
UTSNAME namespace is set.
-i interfacename
Move the named interface into the container. Only allowed if the
NETWORK namespace is set. You may specify this argument multiple
times to move multiple interfaces into container.
-d Daemonize (do not wait for the container to exit before exiting)
-M Mount default filesystems (/proc /dev/shm and /dev/mqueue) in
the container. Only allowed if MOUNT namespace is set.
EXAMPLES
To spawn a new shell with its own UTS (hostname) namespace,
lxc-unshare-s UTSNAME /bin/bash
If the hostname is changed in that shell, the change will not be
reflected on the host.
To spawn a shell in a new network, pid, and mount namespace,
lxc-unshare-s "NETWORK|PID|MOUNT" /bin/bash
The resulting shell will have pid 1 and will see no network interfaces.
After re-mounting /proc in that shell,
mount -t proc proc /proc
ps output will show there are no other processes in the namespace.
To spawn a shell in a new network, pid, mount, and hostname namespace.
lxc-unshare-s "NETWORK|PID|MOUNT|UTSNAME" -M -H slave -i veth1 /bin/bash
The resulting shell will have pid 1 and will see two network interfaces
(lo and veth1). The hostname will be "slave" and /proc will have been
remounted. ps output will show there are no other processes in the
namespace.
SEE ALSOlxc(7), lxc-create(1), lxc-destroy(1), lxc-start(1), lxc-stop(1), lxc-
execute(1), lxc-console(1), lxc-monitor(1), lxc-wait(1), lxc-cgroup(1),
lxc-ls(1), lxc-info(1), lxc-freeze(1), lxc-unfreeze(1), lxc-attach(1),
lxc.conf(5)AUTHOR
Daniel Lezcano <daniel.lezcano@free.fr>
Thu Jul 3 13:01:56 PDT 2014 LXC-UNSHARE(1)