chmod

chmod - change file mode bits.

convert

convert - convert between image formats, resize, blur, crop, despeckle, dither, draw on, flip, join, re-sample, and much more.

arp

arp - manipulate the system ARP cache.

strings

strings - print the strings of printable characters in files

rev

rev - reverse lines characterwise

sed

sed - stream editor for filtering and transforming text.

timeout

timeout - run a command with a time limit.

head

head - output the first part of files

curl

curl - transfer a URL.

dnf

DNF - Package manager for RPM based distributions.

eject

eject - eject removable media.

killall

killall - kill processes by name.

kill

kill - send a signal to a process.

mkdir

mkdir - create directories.

ln

ln - create a link between files.

nl

nl - number lines of files.

ftp

ftp - Internet file transfer program.

vdir

vdir - list directory contents.

dir

dir - List the content of a directory.

tac

tac - concatenate and print files in reverse.

last

last - show listing of last logged in users.

tee

tee - read from standard input and write to standard output and files.

tcpdump

tcpdump - dump traffic on a network.

uniq

uniq - report or omit repeated lines

pstree

pstree - display a tree of processes.

tree

tree - list contents of directories in a tree-like format.

sort

sort - sort lines of text files.

exit

exit - cause normal process termination.

tr

tr - translate or delete characters.

rename

rename - rename multiple files.

chattr

chattr - change file attributes on a Linux file system.

lsattr

lsattr - list file attributes on a Linux second extended file system.

lspci

lspci - list all PCI devices.

lsmod

lsmod - Show the status of modules in the Linux Kernel.

lsusb

lsusb - list USB devices.

whatis

whatis - display one-line manual page descriptions.

w

w - Show who is logged on and what they are doing.

who

who - show who is logged on

aptitude

aptitude - high-level interface to the package manager

whereis

whereis - locate the binary, source, and manual page files for a command.

whoami

whoami - print effective user ID.

which

which - locate a command

fmt

fmt - simple optimal text formatter.

factor

factor - Print the prime factors of each specified integer number.

tail

tail - output the last part of files

sleep

sleep - delay for a specified amount of time.

yes

yes - output a string repeatedly until killed.

uptime

uptime - Tell how long the system has been running.

history

history - Commands history library

du

du - estimate file space usage.

mv

mv - move or rename files

cal

cal - Display the Calendar.

ncal

ncal - Displays a calendar and the date of Easter.

cd

cd - change current working directory.

clear

clear - clear the terminal screen

chown

chown - change file owner and group.

dirname

dirname - strip non-directory suffix from file name.

yum

YUM - Yellowdog Updater Modified

basename

basename - strip directory and suffix from filenames.

dig

dig - DNS lookup utility

echo

echo - display a line of text.

lsof

lsof - list open files.

expand

expand - convert tabs to spaces

ps

ps - report a snapshot of the current processes.

ifconfig

ifconfig - configure a network interface.

apt-cache

apt-cache - APT package handling utility.

nmap

nmap - Network exploration tool and security / port scanner.

fold

fold - wrap each input line to fit in specified width.

pwd

pwd - print name of current/working directory.

shutdown

shutdown - shutdown the machine.

reboot

reboot - reboot the machine.

expr

expr - evaluate expressions.

seq

seq - print a sequence of numbers.

touch

touch - change file timestamps.

apt-get

apt-get - Package manager for Debian based distros.

lscpu

lscpu - displays information about the CPU architecture.

apropos

apropos - search and display a short man page description of a command.

rmdir

rmdir - remove empty directories.

man

man - an interface to the on-line reference manuals

lshw

lshw - List hardware.

alias

alias - create shell shortcuts replacing commands strings.

wc

wc - print newline, word, and byte counts for each file.

ls

ls - list directory contents.

ssh

ssh - OpenSSH SSH client (remote login program).

rm

rm - remove files or directories.

df

df - report file system disk space usage.

dd

dd - Copy a file, converting and formatting according to the operands.

crontab

crontab - maintain crontab files for individual users.

free

free - Display amount of free and used memory in the system.

grep

grep - searches input files for lines containing a match to a given pattern list.

uname

uname - print system information.

wget

wget - The non-interactive network downloader.

cat

cat - concatenate files and print on the standard output.

cp

cp - copy files and directories.

tar

tar - stores and extracts files from a tape or disk archive.

rpm

rpm - RPM Package Manager

dmidecode

dmidecode - dump DMI (SMBIOS) table contents in a human-readable format.

dpkg

dpkg - package manager for Debian

ping

ping - send ICMP ECHO_REQUEST to network hosts.

netstat

netstat - Print network connections, routing tables, interface statistics, masquerade connections, and multicast memberships.

iptables

iptables - administration tool for IPv4 packet filtering and NAT.

date

date - print or set the system date and time.

find

Find - search for files in a directory hierarchy.