Unix Command - Part-1

Unix is an multi user operating system. This operating system provide security to users. Each user work on their shall. Shall is basically work area where user can work. Each Shall in Unix is protected from user id and password that means no any unauthorised user can access that area. Now there are so many commands for managing Unix system such as who, data, cat, mkdir, mv, rmdir, pg, head, tail, grep etc. There are so many other commands are available which is helpful for operating Unix operating System.

UNIX is a multi user Operating System.

Here we will talk about shell programming, through which we can run many commands. For this, first we have to login through login and password.

Example :

Login : shailu
Password : ******

After login sh program will run and we get $ (dollar). If we want to logout then we press (ctrl + d). After successful logout again we get

Login : 
Password : 

Note : No of shall = No of current login user ( That means the more users login, the more shall be given. )   Read more...