8. File search

One, locate command to find files

The locate command is to search by file name in the background database, the search speed is fast, non-real-time.

1. Install mlocate

yum -y install mlocate

2. Update the database

updatedb

3. Find files

locate ifcfg-eth0

Two, whereis and which

1、whereis

whereis find command path and help file

whereis -b cmd // return command path

whereis -m cmd // return the help file path

2、which

which cmd returns the command path

Three, Find to find files

1. Basic syntax of find command

find path option expression action

Find according to file size
// Find files with a file size greater than 5M in the /etc directory
find /etc/ -size +5M

Find according to the file type
// Find the block device file in the /dev directory
find /dev -type b

Find according to time
//Find files 7 days ago in the user's home directory

According to the user search
// Find the file in the centos home directory
find /home/centos -user centos

Find according to permissions
// Find 755 permission files
find ./shell_scripts/ -perm 755 -ls

2. Find processing action

-print: print the found content (default)
-ls : print the found content in a long format display

-delete: delete the found file (only empty directories can be deleted)
-ok: followed by a custom Shell command ( Will prompt whether to operate)

-exec: followed by a custom Shell command (standard writing -exec \;)