Siege Lion on the Way (iii) Linux (18)---Simple operation of the file system

This article only serves as a trap.

One, view the disk and directory capacity: DF du

DF: Lists the overall disk usage for the file system.

Du: Evaluating the disk usage of the file system (commonly used to estimate the capacity of the catalog)

Ii. Connection File: ln
1. Hard Link: Rigid connection or actual connection

Ln/etc/crontab CRONTAB1; <== Creating a hard connection

A hard connection does not create a file (although you can see a new file when using the LS command, but the inode is the same), just add a file name-inode to the directory block.

Limit:

A, cannot cross file system.

B, cannot connect to directory (because of high complexity)

　　　　　　

2, Symbolic Link: symbolic connection, that is, shortcut

Ln-s/etc/crontab crontab2; <== Creating a soft connection

is actually creating a separate file that will read the data to the file name of the file it is connected to.