How to modify files in centos

[1] Modify the file

If you log in as a normal user, you need to switch to the administrator user first, open the terminal, enter: su, and then follow the prompts. Just enter the password; then use the command to enter the directory where the file needs to be modified. Several commonly used commands are as follows:

① cd directory name

② cd ​​space (return to the upper directory)

③ cd space/(return to the highest level directory)

(recommended tutorial: centos usage tutorial)

Then use the command: vi file name command to open the file, Then enter the command: / Keywords to be modified, find the content to be modified, and then use the command to enter [Text Input Mode]. Commonly used commands are as follows:

① a Start inputting text after the cursor

② A Start inputting text at the end of the line

③ i Start inputting text before the cursor

④ I Enter text before the first non-blank character at the beginning of the line

⑤ o Insert a blank line after the line where the cursor is

⑥ O Insert a blank line before the line where the cursor is

[2] Save and exit

After modifying the file, if In [Text Input Mode], first press the "ESC" key to enter [Command Mode], then enter ":" to enter [Last Line Mode]. In Last Line Mode, you can use the following exit command:

① q is to exit directly;

② wq is to exit after saving;

③ q! is to force exit;

④ wq! is to force save and exit;

Related video tutorial sharing: linux video tutorial

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