Linux磁盘如何挂载
linux下mnt目录的作用：
mount 英文解释： 登上; 爬上; 攀登; 骑上; 乘上; 跨上 可直接理解为“挂载”
挂接光驱、USB设备的目录，加载后，会在mnt里多出相应设备的目录。mnt是mount的缩写。
[root@lxglinux ~]# fdisk -l /dev/sdb
Disk /dev/sdb: 10.7 GB, 10737418240 bytes
255 heads, 63 sectors/track, 1305 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x6003c314
Device Boot Start End Blocks Id System
/dev/sdb1 1 262 2104483+ 83 Linux
/dev/sdb2 263 916 5253255 5 Extended
/dev/sdb5 263 524 2104483+ 83 Linux
[root@lxglinux ~]# mount /dev/sdb5 /mnt/ mount命令：挂载分区到指定挂载点/mnt/是挂载点
[root@lxglinux ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda3 18G 2.5G 15G 15% /
tmpfs 504M 0 504M 0% /dev/shm
/dev/sda1 97M 26M 67M 29% /boot
/dev/sdb5 2.0G 68M 1.9G 4% /mnt
[root@lxglinux ~]#
[root@lxglinux ~]# df -T 可以查看文件类型
Filesystem Type 1K-blocks Used Available Use% Mounted on
/dev/sda3 ext4 18475900 2600320 14937036 15% /
tmpfs tmpfs 515228 0 515228 0% /dev/shm
/dev/sda1 ext4 99150 26438 67592 29% /boot
/dev/sdb5 ext4 2071384 68632 1897528 4% /mnt
[root@lxglinux ~]# mount /dev/sdb1 /home/ 将sdb1挂载到/home/下
[root@lxglinux ~]# ls /home/
lost+found
[root@lxglinux ~]# df -h 查看硬盘占用情况等信息
Filesystem Size Used Avail Use% Mounted on
/dev/sda3 18G 2.5G 15G 15% /
tmpfs 504M 0 504M 0% /dev/shm
/dev/sda1 97M 26M 67M 29% /boot
/dev/sdb5 2.0G 68M 1.9G 4% /mnt
/dev/sdb1 2.0G 74M 1.9G 4% /home可以看到挂在上了
[root@lxglinux ~]# unmount /home/卸载
-bash: unmount: command not found
[root@lxglinux ~]# umount /home/
[root@lxglinux ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda3 18G 2.5G 15G 15% /
tmpfs 504M 0 504M 0% /dev/shm
/dev/sda1 97M 26M 67M 29% /boot
/dev/sdb5 2.0G 68M 1.9G 4% /mnt卸载掉了
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[root@lxglinux ~]# mount LABLE=lxg /home/lxg/123/用LABLE方式挂载
mount: you must specify the filesystem type
[root@lxglinux ~]# mount LABEL=lxg /home/lxg/123/
[root@lxglinux ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda3 18G 2.5G 15G 15% /
tmpfs 504M 0 504M 0% /dev/shm
/dev/sda1 97M 26M 67M 29% /boot
/dev/sdb5 2.0G 68M 1.9G 4% /mnt
/dev/sdb1 2.0G 74M 1.9G 4% /home/lxg/123
[root@lxglinux ~]#
[root@lxglinux ~]# cd /mnt/
[root@lxglinux mnt]# ls
lost+found
[root@lxglinux mnt]# touch 123在/mnt/下创建123
[root@lxglinux mnt]# umount /mnt/卸载/mnt/
umount: /mnt: device is busy.显示繁忙无法卸载
(In some cases useful info about processes that use
the device is found by lsof(8) or fuser(1))
[root@lxglinux mnt]# umount -l /dev/sdb1 -l 选项懒惰卸载
[root@lxglinux mnt]# df h
df: "h": 没有那个文件或目录
df: 未处理文件系统
[root@lxglinux mnt]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda3 18G 2.5G 15G 15% /
tmpfs 504M 0 504M 0% /dev/shm
/dev/sda1 97M 26M 67M 29% /boot
/dev/sdb5 2.0G 68M 1.9G 4% /mnt
[root@lxglinux mnt]# umount /dev/sdb5卸载sdb5
umount: /mnt: device is busy.
(In some cases useful info about processes that use
the device is found by lsof(8) or fuser(1))
[root@lxglinux mnt]# umount -l /dev/sdb5卸载sdb5
[root@lxglinux mnt]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda3 18G 2.5G 15G 15% /
tmpfs 504M 0 504M 0% /dev/shm
/dev/sda1 97M 26M 67M 29% /boot
[root@lxglinux mnt]#