Linux Command First Knowledge

First, view the current catalog file

LS Demo view all files under the demo directory

Ls-l Demo/test.txt--View detailed contents of the specified directory (test.txt)

Second, copy the file

CP ori.txt Demo/des.txt--copy ori.txt content to Des.txt and create new Des.txt

Third, add users

Useradd Zhonglitaxue---Add user zhonglitaxue

Iv. Modifying the user's password

Usermod-p 123456 Zhonglitaxue--Modify the user's password, this way the password is visible

passwd Zhonglitaxue--The password in this way is not visible

Five, see all the Users

Tail-l/etc/shadow--View added users

Vi. Deleting users

Userdel-r Zhonglitaxue

Vii. deletion of files

RM-RF Text--delete the file under text and do not access it

Eight, search function, filter, the desired or do not want to separate open

grep Hello Test.txt--Search for the specified string in file Test.txt

Grep-v Hello Test.txt--Search for all rows in the file test.txt that do not contain a pattern

Nine

Linux Command First Knowledge