Linux File System basic operations (Mount Mount, umount Uninstall) __linux

the file system mount, uninstall (Mount, Umount) will be introduced this time

How to mount the use of a file system, mount a common parameter, Mount automatic mounting (/etc/fstab) 1 mount Operation (Mount)

After a disk or partition has created a file system--need to mount--mount to a directory (typically mount under/mnt/) to be able to use

Windows or Mac systems are mounted automatically (automatically mount to the system once the file system is created), which is called C: Disk D: Disk.

Linux needs to mount manually--or configure the system to mount it automatically

/ dev/sdb1------> /mnt

Mount

Command Mount the device source (/DEV/SDB1) mount Destination point (/mnt) to be mounted

For example: Mount/dev/sdb1/mnt, as shown below

Mount Mount Common parameters (Option)

- T specifies the file system type , for example:-T ext3,-t Ext4,-t VFAT

- o specifies mount options , for example:

The-o RO,RW is mounted as read-only and is mounted in read- write form; The default is RW

The-o async represents all operations using caching (memory): Improving the efficiency of file system read and write data; default is async use cache (memory);

-O Sync writes directly to the disk for all operations: On behalf of all operations, instead of using caching , write directly to disk; applied to scenarios where data security is high

The-o atime represents the time that the file was accessed when the file was accessed, and the default is Atimeatime=access times

-O noatime does not update the time the file is accessed each time the file is accessed

-O remount to mount the file system again

#使用不带参数的mount命令来显示所有已经挂载上了的文件系统

#也可将挂载配置写入/etc/fstab, automatic mounting is also implemented

2 Uninstall operation (Umount)

For uninstalling a mounted file system (partition), the equivalent of a Windows system pop-up

Command umount a mounted device source (/DEV/SDB1) or mounted destination (/mnt)

Command umount file System/mount point

Umount /dev/sdb1 = = umount /mnt

For example: UMOUNT/DEV/SDB1 or umount/mnt/

If a device is busy error occurs, the file system is being used;

You can use the following command (fuser) to see which processes are using this filesystem: causing device is busy

fuser –m/mnt

You can also use the following command (lsof) to see which files or folders are open or in use in this filesystem:

lsof /mnt