Linux – System Administration Commands
1 uptime Shows how long system is on and running 2 users Shows users – current logged in 3 free -m/g shows storage details in
1 uptime Shows how long system is on and running 2 users Shows users – current logged in 3 free -m/g shows storage details in
The “man” is a short term for a manual page. In unix-like operating systems such as linux, man is an interface to view the system’s
1 ifconfig Display and manipulate route and network interfaces. 2 ip It is a replacement of the ifconfig command. 3 traceroute Network troubleshooting utility. 4
Redirection can be defined as changing the way from where commands read input to where commands send output. You can redirect input and output of
File archiving is used when one or more files need to be transmitted or stored as efficiently as possible. Archiving: Combines multiple files into one,
VI=VIsual Editor , it’s text editor in UNIX/Linux environment. It has two modes, (i) Command Mode : based on commands you can edit text ,
All the directories in the Linux system come under the root(/) directory which is represented by a forward slash (/). Directory type Types of
Filetype + users permission Index / links owner user size date time File name – rw-rw-r– 1 opc opc 0 Sep 5 02:31 file2
1 Create user – w/o password login as root user useradd <username> 2 Create user – w/o password – as normal user with sudo sudo
1 Current logged in username whoami 2 All users logged in to system who 3 To find user id id 4 To see logged in