Cat(concatenate) command is very frequently used in Linux. It reads data from the file and gives their content as output. It helps us to create, view, concatenate files. So let us see some frequently used cat commands. 

1) To view a single file Command:  

Output  

2) To view multiple files Command:  

Output  

3) To view contents of a file preceding with line numbers. Command:  

Output  

4) Create a file Command:  

Output  

5) Copy the contents of one file to another file. Command:  

Output  

6) Cat command can suppress repeated empty lines in output Command:  

Output  

7) Cat command can append the contents of one file to the end of another file. Command:  

Output  

8) Cat command can display content in reverse order using tac command. Command:  

Output  

9) Cat command can highlight the end of line. Command:  

Output  

10) If you want to use the -v, -E and -T option together, then instead of writing -vET in the command, you can just use the -A command line option. Command  

11) Cat command to open dashed files. Command:  

Output  

12) Cat command if the file has a lot of content and can’t fit in the terminal. Command:  

Output  

13) Cat command to merge the contents of multiple files. Command:  

Output  

14) Cat command to display the content of all text files in the folder. Command:  

Output  

15) Cat command to write in an already existing file. 

Command :

Output

?list=PLqM7alHXFySFc4KtwEZTANgmyJm3NqS_L 

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