mount命令

Posted 2020-10-31

磁盘进行挂载一定是一个目录，这个目录就是进入该磁盘分区的一个入口。

挂载命令mount，首先man mount查看技术文档。

 mount - mount a filesystem 挂载文件系统

The standard form of the mount command, is mount -t type -o options device dir(标准语法)

-t type表示：指定要挂载的文件系统类型，ext2/ext3/ext4/vfat/iso9660...

-o options表示：额外的参数，如ro/rw,async/sync,auto/noauto...

device表示：是一个文件的名称或一个特殊的块设备，比如/dev/sda1，也可能是一个特殊的NFS设备名称可能是knuth.cwi.nl:/dir，这样就需要使用它的LABEL或UUID进行自动0挂载。

dir表示：挂载的目录

mount 的选项

[[email protected] ~]# mount -V 查看版本信息

mount from util-linux-ng 2.17.2 (with libblkid and selinux support)

[[email protected] ~]# mount -h 查看帮助信息

Usage: mount -V                 : print version

       mount -h                 : print this help

       mount                    : list mounted filesystems

       mount -l                 : idem, including volume labels

So far the informational part. Next the mounting.

The command is `mount [-t fstype] something somewhere'.

Details found in /etc/fstab may be omitted.

       mount -a [-t|-O] ...     : mount all stuff from /etc/fstab

       mount device             : mount device at the known place

       mount directory          : mount known device here

       mount -t type dev dir    : ordinary mount command

Note that one does not really mount a device, one mounts

a filesystem (of the given type) found on the device.

One can also mount an already visible directory tree elsewhere:

       mount --bind olddir newdir

or move a subtree:

       mount --move olddir newdir

One can change the type of mount containing the directory dir:

       mount --make-shared dir

       mount --make-slave dir

       mount --make-private dir

       mount --make-unbindable dir

One can change the type of all the mounts in a mount subtree

containing the directory dir:

       mount --make-rshared dir

       mount --make-rslave dir

       mount --make-rprivate dir

       mount --make-runbindable dir

A device can be given by name, say /dev/hda1 or /dev/cdrom,

or by label, using  -L label  or by uuid, using  -U uuid .

Other options: [-nfFrsvw] [-o options] [-p passwdfd].

For many more details, say  man 8 mount .

[[email protected] ~]# mount -v 冗长格式，查看所有挂载的详细信息

/dev/sda5 on / type ext4 (rw)

proc on /proc type proc (rw)

sysfs on /sys type sysfs (rw)

devpts on /dev/pts type devpts (rw,gid=5,mode=620)

tmpfs on /dev/shm type tmpfs (rw)

/dev/sda1 on /boot type ext4 (rw)

/dev/sda2 on /usr type ext4 (rw)

/dev/sdc4 on /home type ext4 (rw)

none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)

L LABEL=指定label进行挂载

U UUID 指定UUID进行挂载

常用命令：

[[email protected] ~]# mount -a   依据/etc/fstab文件信息进行挂载所有