cat
I. Description
The 'cat' command is used to output the content of a file to STDOUT. It is generally useful when you want to see the content of a file without having to open the file in a text editor like vim.
The 'cat' command will work with any type of file, however when used on a file that contains something other than text the output will probably be indecipherable by a human being looking at the output.
II. Examples
Example 2.1
Using the 'cat' command to view the content of a file.
john@comp:~$
cat file_1.txt
This is some text.