Mount command and/etc/fstab file details

Mount: Mount

Uninstall: Umount

Auto Mount Profile:/etc/fstab

One, manual mount equipment

Mount Mount Command

Format:

mount [Options] [-t fstype] [-o-option] device mount point

Common options [Options]:

Common options:
-T Fstype (ext2, ext3, Ext4, XFS, iso9660, SMB, etc.)
-R: Read-only Mount
-W: Read and Write
-L lable: specified as volume label, lable= "label"
-U UUID: Mount device specified with UUID, uuid= "UUID"
-A: Automatically mount all (in/etc/fstab files) devices that support automatic mounting

--bind Dir1 Dir2 has been mounted on the file, you can again bind other directories to use

-N: Do not update the/etc/mtab file

-O Options
Async: Asynchronous I/O
Sync: synchronous I/O
Noatime/atime: Recommended Noatime
Auto/noauto: Can be automatically mounted by the MOUNT-A option;
Diratime/nodiratime: Whether to update the access timestamp of the directory;
Exec/noexec: Whether the binary program is allowed to execute;
_netdev: Network Equipment
Remount: Re-mount
ACL: Enable Facl

# Tune2fs-o Mount-option Equipment
# tune2fs-o ^mount-option Cancel

Example:

(1), mount, default does not specify the option will automatically append the following properties

Defaults (rw, suid, dev, exec, auto, nouser, async, and Relatime.)

[Email protected] ~]# MOUNT/DEV/SDA5/MNT/SDA5

(2), view mount status

[email protected] ~]# Mount | grep "Sda5"/dev/sda5 on/mnt/sda5 type EXT4 (rw)

Ii. viewing the process that occupies a mounted device

Fuser-v mount point
fuser-km mount point

When uninstalling a file system, the following information appears, indicating that someone is using the device.

[Email protected] ~]# Umount/dev/sda5umount:/mnt/sda5:device is busy. (In some cases useful info about processes, use the device are found by lsof (8) or fuser (1))

View First

[Email protected] ~]# fuser-c/mnt/sda5/mnt/sda5:13796c[[email protected] ~]# fuser-c/MNT/SDA5/FIND//MNT/SD a5/find/: 13796c

Kill the user who is using the file system before uninstalling

[Email protected] ~]# fuser-km/mnt/sda5/mnt/sda5:13796c

Third, uninstall

# Umount Mount Device | Holding point

Iv. Mounting configuration file/etc/fstab

[[email protected] ~]# cat /etc/fstab## /etc/fstab# created by  Anaconda on fri jul 31 23:50:21 2015## accessible filesystems, by  reference, are maintained under  '/dev/disk ' # see man pages fstab (5),  findfs (8),  mount (8)  and/or blkid (8)  for more info#/dev/mapper/vg_ system-root /                        ext4    defaults         1 1UUID=3a9c20f4-0cc2-4563-9e2c-d4833c1463c2 /boot                    ext4     defaults        1 2/dev/mapper/vg_system-var / var                    ext4     defaults        1 2/dev/mapper/vg_system-swap  swap                     swap    defaults        0  0tmpfs                    /dev/shm                 tmpfs   defaults        0 0devpts                   /dev/pts                 devpts   gid=5,mode=620  0 0sysfs                    /sys                     sysfs   defaults         0 0proc                     /proc                    proc    defaults         0 0

The document is divided into six paragraphs with the following meanings:

Device mount point file System type Mount options dump frequency self-test order

(1) device to be mounted:

Device files, label=, uuid=
(2) Mount point:

Swap has no mount point, the mount point is swap
(3) File system type

Ext2, Ext3, Ext4, XFS, NFS, SMB, ISO9660, etc.
(4) Mount option: Use commas to separate multiple options;

Async, Sync, _netdev

Defaults (rw, suid, dev, exec, auto, nouser, async, and Relatime.)
(5) Dump frequency:
0: Never Back up
1: Daily backup
2: Backup every other day
(6) Self-Test order:
0: No self-test
1: First self-test, usually can only be/used;
2: After the completion of the self-test with the number 1, the self-test

Note: The file will not take effect immediately after it is configured, you can restart the operating system or use MOUNT-A to make the file effective immediately.

This article is from "Rookie Diary" blog, please make sure to keep this source http://zkxfoo.blog.51cto.com/1605971/1758529

Mount command and/etc/fstab file details