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You are here: manpages





UNSHARE

Section: User Manuals (1)
Updated: OCTOBER 2008
Index Return to Main Contents
 

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.
 

NOTES

The unshare command drops potential privileges before executing the target program. This allows to setuid unshare.  

SEE ALSO

unshare(2), clone(2)  

BUGS

None known so far.  

AUTHOR

Mikhail Gusarov <dottedmag@dottedmag.net>  

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/.


 

Index

NAME
SYNOPSIS
DESCRIPTION
OPTIONS
NOTES
SEE ALSO
BUGS
AUTHOR
AVAILABILITY

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