Here, chmod +x adds the executable permissions in linux 4: Read (r) Grants read permission 2: Write (w) Grant write permission 1: Execute (x) Grant execute permission

Here, Uptime Command is used to find out how long the system is active (running). This command returns set of values that involve, the current time, and the amount of time system is in running state, number of users currently logged into, and the load time for the past 1, 5 and 15 minutes respectively.

Here, in linux OS

Here, in Mac OS

In Linux

In Mac

Git in Linux

Check Git

Git in Mac

Enable Line Numbers: In “Command” mode, type :set number and press Enter. This will display line numbers along the left-hand side of the editor.

Less command is a Linux utility that can be used to read the contents of a text file one page (one screen) at a time. It has faster access because if a file is large, it doesn’t access the complete file, but accesses it page by page. And exit by :q

more command is used to view the text files in the command prompt, displaying one screen at a time in case the file is large (For example log files). The more command also allows the user do scroll up and down through the page.