Linux Command

chmod
Function: change file mode bits
Usage: chmod [OPTION]... --reference=RFILE FILE...
tput
Function: initialize a terminal or query terminfo database
Usage: tput -S <<
su
Function: run a shell with substitute user and group IDs
Usage: su [OPTION]... [-] [USER [ARG]...]
pgawk
Function: pattern scanning and processing language
Usage: pgawk [ POSIX or GNU style options ] [ -- ] program-text file ...
mount
Function: mount a filesystem
Usage: mount -a [-fFnrsvw] [-t vfstype] [-O optlist]
rm
Function: remove files or directories
Usage: rm [OPTION]... FILE...
uniq
Function: report or omit repeated lines
Usage: uniq [OPTION]... [INPUT [OUTPUT]]
basename
Function: strip directory and suffix from filenames
Usage: basename NAME [SUFFIX]
which
Function: shows the full path of (shell) commands.
Usage: which [options] [--] programname [...]
size
Function: list section sizes and total size.
Usage: size [-A|-B|-G|--format=compatibility] [--help] [-d|-o|-x|--radix=number] [--common] [-t|--totals] [--target=bfdname] [-V|--version] [objfile...]
wc
Function: print newline, word, and byte counts for each file
Usage: wc [OPTION]... --files0-from=F
dd
Function: convert and copy a file
Usage: dd OPTION
sleep
Function: delay for a specified amount of time
Usage: sleep OPTION
mesg
Function: control write access to your terminal
Usage: mesg [y|n]
netstat
Function: Print network connections, routing tables, interface statis-tics, masquerade connections, and multicast memberships
Usage: netstat [address_family_options] [--tcp|-t] [--udp|-u] [--raw|-w] [--listening|-l] [--all|-a] [--numeric|-n] [--numeric-hosts] [--numeric-ports][--numeric-ports] [--symbolic|-N] [--extend|-e[--extend|-e]] [--timers|-o] [--program|-p] [--verbose|-v] [--continuous|-c] [delay]