UNIX basic commands

1 $ logname Display the current user name
2 $pwd Displays the current working directory
3 $clear Clears the screen
4 $exit To logout form the current user
5 $date Displays the system date and time
6 $who am i It displays current username, terminal number, date and time at which you logged into the system
7 $who To display the information about all the users who have logged into the system currently. i.e. Each user login name terminal number, date and time that the person logged in
8 $finger It displays complete information about all the users who are logged in.
9 $cal It displays previous month, current month and next month calendar
10 $init To change the system run levels.#init 0 : to shutdown the system

#init 1 : to bring the system to single user mode.

#init 2 : to bring the system to multi user mode with no resource shared

#init 3 : to bring the system multi user mode with source shared.

#init 4 : halt and reboot the system to the default run level

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