How to read file in Unix?

Answer 1

There are a number of utilities in Linux which you can use to read a file.
Some of these are:

 1. gedit  (its a text editor for GNOME, like a note pad in windows)
    example :  $ gedit your_fileName
 2. cat  (concatenate files and print on the standard output)
    example:   $ cat your_fileName        //It will print the containts of the file onto the terminal itself.
 3.  vi or vim 
    example :  $ vi your_fineName.

Answer 2

Use the following command.
$cat file_name