Rrc en 18:00 25 jul 2014

2014-07-25T18:00:54Z

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__NOTOC__
* [[:#umount | umount]]

== umount ==

<syntaxhighlight lang="bash">

[rrc@Llawyr ~]$ umount --help

Usage:
umount [-hV]
umount -a [options]
umount [options] <source> | <directory>

Options:
-a, --all unmount all filesystems
-A, --all-targets unmount all mountpoins for the given device in the
current namespace
-c, --no-canonicalize don't canonicalize paths
-d, --detach-loop if mounted loop device, also free this loop device
--fake dry run; skip the umount(2) syscall
-f, --force force unmount (in case of an unreachable NFS system)
-i, --internal-only don't call the umount.<type> helpers
-n, --no-mtab don't write to /etc/mtab
-l, --lazy detach the filesystem now, clean up things later
-O, --test-opts <list> limit the set of filesystems (use with -a)
-R, --recursive recursively unmount a target with all its children
-r, --read-only in case unmounting fails, try to remount read-only
-t, --types <list> limit the set of filesystem types
-v, --verbose say what is being done

-h, --help display this help and exit
-V, --version output version information and exit

For more details see umount(8).
[rrc@Llawyr ~]$ umount --version
umount from util-linux 2.24 (libmount 2.24.0: debug, assert)

[root@Llawyr mnt]# mount -t auto /dev/sdd1 /mnt/usb

[root@Llawyr mnt]# mount
proc on /proc type proc (rw,relatime)
sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime)
devtmpfs on /dev type devtmpfs (rw,nosuid,size=6124048k,nr_inodes=1531012,mode=755)
devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000)
.
.
.
/dev/sda1 on /boot type ext4 (rw,noatime,data=ordered)
/dev/sda3 on /home type ext4 (rw,noatime,data=ordered)
/dev/sdd1 on /mnt/usb type xfs (rw,relatime,attr2,inode64,noquota)

[root@Llawyr mnt]# umount /dev/sdd1

[root@Llawyr mnt]# mount
proc on /proc type proc (rw,relatime)
sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime)
devtmpfs on /dev type devtmpfs (rw,nosuid,size=6124048k,nr_inodes=1531012,mode=755)
devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000)
.
.
.
/dev/sda1 on /boot type ext4 (rw,noatime,data=ordered)
/dev/sda3 on /home type ext4 (rw,noatime,data=ordered)

[root@Llawyr mnt]# mount -t auto /dev/sdd1 /mnt/usb

[root@Llawyr mnt]# mount
proc on /proc type proc (rw,relatime)
sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime)
devtmpfs on /dev type devtmpfs (rw,nosuid,size=6124048k,nr_inodes=1531012,mode=755)
devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000)
.
.
.
/dev/sda1 on /boot type ext4 (rw,noatime,data=ordered)
/dev/sda3 on /home type ext4 (rw,noatime,data=ordered)
/dev/sdd1 on /mnt/usb type xfs (rw,relatime,attr2,inode64,noquota)

[root@Llawyr mnt]# umount usb

[root@Llawyr mnt]# mount
proc on /proc type proc (rw,relatime)
sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime)
devtmpfs on /dev type devtmpfs (rw,nosuid,size=6124048k,nr_inodes=1531012,mode=755)
devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000)
.
.
.
/dev/sda1 on /boot type ext4 (rw,noatime,data=ordered)
/dev/sda3 on /home type ext4 (rw,noatime,data=ordered)

[root@Llawyr mnt]# mount -t auto /dev/sdd1 /mnt/usb

[root@Llawyr mnt]# mount
proc on /proc type proc (rw,relatime)
sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime)
devtmpfs on /dev type devtmpfs (rw,nosuid,size=6124048k,nr_inodes=1531012,mode=755)
devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000)
.
.
.
/dev/sda1 on /boot type ext4 (rw,noatime,data=ordered)
/dev/sda3 on /home type ext4 (rw,noatime,data=ordered)
/dev/sdd1 on /mnt/usb type xfs (rw,relatime,attr2,inode64,noquota)

[root@Llawyr /]# cd /mnt/usb

[root@Llawyr usb]# mkdir LoopMNT

[root@Llawyr usb]# mount -t iso9660 -o loop ~rrc/Downloads/Mageia/Mageia-4-x86_64-DVD.iso LoopMNT/
mount: /dev/loop0 is write-protected, mounting read-only

[root@Llawyr usb]# ls -al LoopMNT/
total 23
dr-xr-xr-x 7 root root 2048 Jan 30 15:08 ./
drwxr-xr-x 3 root root 20 Jul 19 09:27 ../
-r--r--r-- 1 root root 80 May 27 2011 autorun.inf
-r--r--r-- 1 root root 2048 Jan 30 15:11 boot.catalog
dr-xr-xr-x 3 root root 2048 May 27 2011 dosutils/
dr-xr-xr-x 3 root root 2048 Jan 25 15:07 EFI/
dr-xr-xr-x 3 root root 10240 Jan 29 16:45 isolinux/
dr-xr-xr-x 3 root root 2048 Jan 25 15:07 loader/
dr-xr-xr-x 6 root root 2048 Jan 30 15:11 x86_64/

[root@Llawyr usb]# cd /mnt

[root@Llawyr mnt]# umount usb
umount: /mnt/usb: target is busy
(In some cases useful info about processes that
use the device is found by lsof(8) or fuser(1).)

[root@Llawyr mnt]# umount -R usb

[root@Llawyr mnt]# ls -al usb
total 8
drwxr-xr-x 2 root root 4096 Jul 17 12:52 ./
drwxr-x--- 5 root adm 4096 Jul 17 13:03 ../

[root@Llawyr mnt]# mount -t auto /dev/sdb1 /mnt/usb

[root@Llawyr mnt]# umount -v /mnt/usb
umount: /mnt/usb (/dev/sdb1) unmounted

</syntaxhighlight>

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Rrc en 18:00 25 jul 2014