cat Linux Command Cheatsheet
cat command is used to create, read & concatenate files in Linux/ Unix machines.
1. Creating a file with content
Lets create a file with name
file1.txt and put following three lines of content into it.
First you need to run the following command to create a file
When you press enter after the above command, it waits for the file content input. You can give multi line input and once you are done you need to press
CTRL + D to save and exit.
2. Displaying file contents
Following command shows the content of given file
3. Display content from multiple files
Following command shows content from file1.txt followed by content from file2.txt
cat file1.txt file2.txt
4. Display Line Numbers before every line
Following command prefixes line numbers before each line from content
cat -n file1.txt
Following is an example for that
$ cat -n file1.txt 1 line-1 2 line-2 3 line-3 4 line-4
|To see tabs in file, this shows tabs with |
|removes repeated empty lines in content|