continuation of Linux Commands

day03#90daysofdevops#trainwithshubham
In this blog, we are going to learn about Linux commands used in day-to-day activities.

1. cat:- This command is used to display files on the terminal. It can also be used to modify the existing ones.

   

   cat -b: This adds line numbers to non-blank lines.

   

   cat -n: This adds line numbers to all lines.

   

   

   cat -s: This squeezes blank lines into one line

   cat –E: This shows $ at the end of the line

   

2. chmod:- command is used to change the permissions of the files.

   

3. chown:- This command is used to change the file Owner or group.

   here, the ownership of 'abc.txt' is changed to 'root'.

   

4. History - This command is used to check which commands you have run till now.

   

   History 10:- will give you the last 10 executed commands.

   

5. rm - To remove a directory/ Folder

6. 

   touch - To create a file.

   

   vim editor is used to add contents to the file.
   Modes used in VIM:

   • Normal mode: This is the default mode in which vim starts. In normal mode, you can use various commands to navigate and edit the text.

   • Insert mode: In insert mode, you can type text into the file. To enter insert mode, press the "i" key. To exit insert mode and return to normal mode, press the "Esc" key.

   • Command mode: In command mode, you can enter commands to perform various actions, such as saving the file or quitting vim. To enter command mode, press the ":" key.(:wq is the command for saving and quitting vim)

1. head - this command prints the first N number of data of the given input. We can also specify the number of lines that we need to print.

   

2. tail - this command prints the last N number of data of the given input. We can also specify the number of lines that we need to print.

   

3. diff - This command is used to find the difference between two files.