Three methods for viewing disk mounting in linux

This article mainly introduces three methods for viewing disk mounting in linux. For more information, see

Method 1: run the df command, for example:

Copy codeThe code is as follows:
Orientalson:/home # df
Filesystem 1K-blocks Used Available Use % Mounted on
/Dev/sda2 15213032 8043668 7169364 53%/
Udev 514496 104 514392 1%/dev
/Dev/mapper/vg_test-lv_test
511980 32840 479140 7%/home/mt
Orientalson:/home #

The Mount point/home/mt shown above is not in the same line as the volume mounted by her. it is very troublesome to use shell script for analysis.

Method 2: run the mount command, mount-l. The disadvantage of this method is that there is no volume size, but the mount point and the mounted volume are in the same row. For example:

Copy codeThe code is as follows:
Orientalson:/home # mount-l
/Dev/sda2 on/type reiserfs (rw, acl, user_xattr) []
Proc on/proc type proc (rw)
Sysfs on/sys type sysfs (rw)
Debugfs on/sys/kernel/debug type debugfs (rw)
Udev on/dev type tmpfs (rw)
Devpts on/dev/pts type devpts (rw, pattern = 0620, gid = 5)
Securityfs on/sys/kernel/security type securityfs (rw)
/Dev/mapper/vg_test-lv_test on/home/mt type reiserfs (rw) []
Orientalson:/home #

Method 3: view the file/etc/mtab. The principle is that this file is basically updated every time a new volume is mounted. you can use this file to view the mount points and mounted volumes. This method is a little clearer than mount-l, but sometimes it is unreliable.

Copy codeThe code is as follows:
Orientalson:/home # cat/etc/mtab
/Dev/sda2/reiserfs rw, acl, user_xattr 0 0
Proc/proc rw 0 0
Sysfs/sys sysfs rw 0 0
Debugfs/sys/kernel/debug debugfs rw 0 0
Udev/dev tmpfs rw 0 0
Devpts/dev/pts devpts rw, mode = 0620, gid = 5 0 0
Securityfs/sys/kernel/security securityfs rw 0 0
/Dev/mapper/vg_test-lv_test/home/mt reiserfs rw 0 0
Orientalson:/home #

As mentioned above, this file will basically be updated, but it is not always updated. If the-n option is used during mounting, the/etc/mtab file will not mount the volume information.

Copy codeThe code is as follows:
Orientalson:/home # umount/home/mt
Orientalson:/home # mount-n/dev/vg_test/lv_test/home/mt
Orientalson:/home # cat/etc/mtab
/Dev/sda2/reiserfs rw, acl, user_xattr 0 0
Proc/proc rw 0 0
Sysfs/sys sysfs rw 0 0
Debugfs/sys/kernel/debug debugfs rw 0 0
Udev/dev tmpfs rw 0 0
Devpts/dev/pts devpts rw, mode = 0620, gid = 5 0 0
Securityfs/sys/kernel/security securityfs rw 0 0
Orientalson:/home #