GSP
Quick Navigator

Search Site

Unix VPS
A - Starter
B - Basic
C - Preferred
D - Commercial
MPS - Dedicated
Previous VPSs
* Sign Up! *

Support
Contact Us
Online Help
Handbooks
Domain Status
Man Pages

FAQ
Virtual Servers
Pricing
Billing
Technical

Network
Facilities
Connectivity
Topology Map

Miscellaneous
Server Agreement
Year 2038
Credits
 

USA Flag

 

 

Man Pages


Manual Reference Pages  -  NSENTER (1)

NAME

nsenter - run program with namespaces of other processes

CONTENTS

Synopsis
Description
Options
See Also
Author
Availability

SYNOPSIS

nsenter [options] [program [arguments]]

DESCRIPTION

Enters the namespaces of one or more other processes and then executes the specified program. Enterable namespaces are:
mount namespace
  Mounting and unmounting filesystems will not affect the rest of the system (CLONE_\:NEWNS flag), except for filesystems which are explicitly marked as shared (with mount --make-\:shared; see /proc\:/self\:/mountinfo for the shared flag).
UTS namespace
  Setting hostname or domainname will not affect the rest of the system. (CLONE_\:NEWUTS flag)
IPC namespace
  The process will have an independent namespace for System V message queues, semaphore sets and shared memory segments. (CLONE_\:NEWIPC flag)
network namespace
  The 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)
PID namespace
  Children will have a set of PID to process mappings separate from the nsenter process (CLONE_\:NEWPID flag). nsenter will fork by default if changing the PID namespace, so that the new program and its children share the same PID namespace and are visible to each other. If --no-fork is used, the new program will be exec’ed without forking.
See clone(2) for the exact semantics of the flags.
If program is not given, then ‘‘${SHELL}’’ is run (default: /bin\:/sh).
 

OPTIONS

-t, --target pid
  Specify a target process to get contexts from. The paths to the contexts specified by pid are:
/proc/pid/ns/mnt the mount namespace
/proc/pid/ns/uts the UTS namespace
/proc/pid/ns/ipc the IPC namespace
/proc/pid/ns/net the network namespace
/proc/pid/ns/pid the PID namespace
/proc/pid/root the root directory
/proc/pid/cwd the working directory respectively
-m, --mount[=file]
  Enter the mount namespace. If no file is specified, enter the mount namespace of the target process. If file is specified, enter the mount namespace specified by file.
-u, --uts[=file]
  Enter the UTS namespace. If no file is specified, enter the UTS namespace of the target process. If file is specified, enter the UTS namespace specified by file.
-i, --ipc[=file]
  Enter the IPC namespace. If no file is specified, enter the IPC namespace of the target process. If file is specified, enter the IPC namespace specified by file.
-n, --net[=file]
  Enter the network namespace. If no file is specified, enter the network namespace of the target process. If file is specified, enter the network namespace specified by file.
-p, --pid[=file]
  Enter the PID namespace. If no file is specified, enter the PID namespace of the target process. If file is specified, enter the PID namespace specified by file.
-r, --root[=directory]
  Set the root directory. If no directory is specified, set the root directory to the root directory of the target process. If directory is specified, set the root directory to the specified directory.
-w, --wd[=directory]
  Set the working directory. If no directory is specified, set the working directory to the working directory of the target process. If directory is specified, set the working directory to the specified directory.
-F, --no-fork
  Do not fork before exec’ing the specified program. By default, when entering a PID namespace, nsenter calls fork before calling exec so that any children will also be in the newly entered PID namespace.
-V, --version
  Display version information and exit.
-h, --help Display help text and exit.

SEE ALSO

setns(2), clone(2)

AUTHOR

Eric Biederman

AVAILABILITY

The nsenter command is part of the util-linux package and is available from Linux Kernel Archive
Search for    or go to Top of page |  Section 1 |  Main Index


util-linux NSENTER (1) June 2013

Powered by GSP Visit the GSP FreeBSD Man Page Interface.
Output converted with manServer 1.07.