Linux, Unix, cli, Command,

top [Command]

Command top Displays a list of currently executing processes, ordered by the percentage use of CPU time. Syntax top Options q: requires top performance with the highest possible priority (for this you should …
Linux, Unix, cli, Command,

pstree [Command]

Command pstree Displays all running processes in a tree. Syntax pstree Options -a displays the command line arguments. -c does not compress the subtrees. -l displays a long line. -n sorts the processes …
Linux, Unix, cli, Command,

ps [Command]

Command ps Displays the status of processes (programs) running in the system. Syntax ps Options Note that unlike other commands ps command options do not have a prefix “-“. a display processes of other …
kill [Command]

kill [Command]

Command kill Kill command sends a signal to the process. Syntax kill id_process Options -Nsignal sends a specified signal (where Nsignal – the number or name). -l displays the number and names of signals. …
free [Command]

free [Command]

Command free free command displays the number of free and used memory in the system. Syntax free Options -b: displays the amount of memory in bytes. -k: displays the memory size in kilobytes (default). …
du [Command]

du [Command]

Command du du command displays the amount of disk space occupied by files or directories. Syntax du Options -a displays information about memory usage for all files (not only for directories). -b displays …
df [Command]

df [Command]

Command df df command displays the number of free and occupied space on all mounted filesystems systems. Syntax df Options -a displays all file systems. -i displays information about the inode if appropriate …
Linux, Unix, cli, Command,

cal [Command]

Command cal cal Displays a calendar for any month of any year. Syntax cal year] Options cal displays a simple calendar. If arguments are not specified, the current month is displayed. The options …
wc [Command]

wc [Command]

Command wc Displays the number of bytes, words and lines found in the file. Syntax wc Options -c displays only the number of bytes. -w only shows the number of words. -l displays …
unalias [Command]

unalias [Command]

Command unalias Eliminates the abbreviation as defined previously by using the alias. Syntax unalias abbreviation Description command unalias removes the abbreviation as defined previously by using the alias. Command unalias is a built-in command processor …