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| author | Karel Zak | 2016-02-24 13:28:19 +0100 |
|---|---|---|
| committer | Karel Zak | 2016-02-24 13:28:19 +0100 |
| commit | 249fc8fe899f51fad1eda05e97b38633ea78119f (patch) | |
| tree | a2a41bc6fd4867068f15c1cc717af097495c2b88 /sys-utils/unshare.1 | |
| parent | chrt: restore removed ifdef SCHED_RESET_ON_FORK (diff) | |
| download | kernel-qcow2-util-linux-249fc8fe899f51fad1eda05e97b38633ea78119f.tar.gz kernel-qcow2-util-linux-249fc8fe899f51fad1eda05e97b38633ea78119f.tar.xz kernel-qcow2-util-linux-249fc8fe899f51fad1eda05e97b38633ea78119f.zip | |
unshare: add example for persistent mount namespace
References: https://github.com/karelzak/util-linux/issues/289
Signed-off-by: Karel Zak <kzak@redhat.com>
Diffstat (limited to 'sys-utils/unshare.1')
| -rw-r--r-- | sys-utils/unshare.1 | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/sys-utils/unshare.1 b/sys-utils/unshare.1 index 71a0a3676..264f13969 100644 --- a/sys-utils/unshare.1 +++ b/sys-utils/unshare.1 @@ -62,7 +62,9 @@ by bind mount. .TP .BR \-m , " \-\-mount"[=\fIfile\fP] Unshare the mount namespace. If \fIfile\fP is specified then persistent namespace is created -by bind mount. +by bind mount. Note that \fIfile\fP has to be located on filesystem with +propagation flag set to \fBprivate\fP. Use command \fBfindmnt -o+PROPAGATION\fP +if not sure about the current setting. See also examples below. .TP .BR \-n , " \-\-net"[=\fIfile\fP] Unshare the network namespace. If \fIfile\fP is specified then persistent namespace is created @@ -153,6 +155,21 @@ FOO .br Establish a persistent UTS namespace, modify hostname. The namespace maybe later entered by nsenter. The namespace is destroyed by umount the bind reference. + +.TP +.TQ +.B # mount --bind /root/namespaces /root/namespaces +.TQ +.B # mount --make-private /root/namespaces +.TQ +.B # touch /root/namespaces/mnt +.TQ +.B # unshare --mount=/root/namespaces/mnt +.br +Establish a persistent mount namespace referenced by the bind mount +/root/namespaces/mnt. This example provides portable solution, because it makes +sure that the bind mount is created on shared filesystem. + .SH SEE ALSO .BR unshare (2), .BR clone (2), |