Command ldd ldd command displays the names of shared libraries required for execution. Syntax ldd [options] program Options -v displays the version number of ldd. -V displays the
Command info info command displays online help for any command Linux. Syntax info [options] command Options -d add the directory to the list of directories in which files
Command passwd Changes the password. Syntax passwd [username] Description The passwd command changes your password. It asks for old password, and then the new password. If you are
Command groups groups command shows the groups to which the user belongs. Syntax groups [username] Description groups command displays the names of groups to which the user belongs.
Basic vi commands Command Description TERM = terminal_name export TERM Setting Terminal configuration tput init Initialize terminal as terminal_name vi filename Open the vi text editor to edit
Command killall killall command kills all active processes. Syntax killall [options] Options view option kill command Description Command killall kills all active processes. Implied value send a signal
Command uptime Displays the time of continuous operation of the system. Syntax uptime Description uptime utility displays the current time, time of continuous operation of the system, the
Command top Displays a list of currently executing processes, ordered by the percentage use of CPU time. Syntax top [q] [d interval] Options q: requires top performance with
Command pstree Displays all running processes in a tree. Syntax pstree [options] [process_id] Options -a displays the command line arguments. -c does not compress the subtrees. -l displays
