For All the Videos
arch - print machine hardware name (same as uname -m)
arp - manipulate the system ARP cache
at, batch, atq, atrm - queue, examine or delete jobs for later execution
gawk - pattern scanning and processing language
bc - An arbitrary precision calculator language
blkid - locate/print block device attributes
cal - display a calendar
cat - concatenate files and print on the standard output
bash, :, ., [, alias, bg, bind, break, builtin, caller, cd, command, compgen,
chage - change user password expiry information
chattr - change file attributes on a Linux file system
chgrp - change group ownership
chmod - change file mode bits
chown - change file owner and group
cp - copy files and directories
cpio - copy files to and from archives
crontab - maintains crontab files for individual users
curl - transfer a URL
cut - remove sections from each line of files
date - print or set the system date and time
dd - convert and copy a file
df - report file system disk space usage
diff - compare files line by line
dig - DNS lookup utility
du - estimate file space usage
expr - evaluate expressions
fdisk - manipulate disk partition table
find - search for files in a directory hierarchy
firewall-cmd - firewalld command line client
free - Display amount of free and used memory in the system
grep, egrep, fgrep - print lines matching a pattern
head - output the first part of files
bash, :, ., [, alias, bg, bind, break, builtin, caller, cd, command, compgen,
hostname - show or set the system's host name
id - print real and effective user and group IDs
ifconfig - configure a network interface
ip - show / manipulate routing, devices, policy routing and tunnels
kill - terminate a process
last, lastb - show listing of last logged in users
less - opposite of more
ln - make links between files
ls - list directory contents
lsof - list open files
lspci - list all PCI devices
man - an interface to the on-line reference manuals
mkdir - make directories
mount - mount a filesystem
mv - move (rename) files
netstat - Print network connections, routing tables, interface statistics, mas‐
nice - run a program with modified scheduling priority
nslookup - query Internet name servers interactively
passwd - update user's authentication tokens
pam_tally2 - The login counter (tallying) module
paste - merge lines of files
ping - send ICMP ECHO_REQUEST to network hosts
perl - The Perl 5 language interpreter
pgrep, pkill - look up or signal processes based on name and other attributes
ps - report a snapshot of the current processes.
pwd - print name of current/working directory
halt, poweroff, reboot - Halt, power-off or reboot the machine
rm - remove files or directories
rpm - RPM Package Manager
rsync - a fast, versatile, remote (and local) file-copying tool
sed - stream editor for filtering and transforming text
sort - sort lines of text files
ss - another utility to investigate sockets
sysctl - configure kernel parameters at runtime
tail - output the last part of files
tar - manual page for tar 1.26
top - display Linux processes
touch - change file timestamps
tr - translate or delete characters
uname - print system information
uniq - report or omit repeated lines
uptime - Tell how long the system has been running.
useradd - create a new user or update default new user information
vim - Vi IMproved, a programmers text editor
vmstat - Report virtual memory statistics
w - Show who is logged on and what they are doing.
watch - execute a program periodically, showing output fullscreen
wc - print newline, word, and byte counts for each file
Wget - The non-interactive network downloader.
yum - Yellowdog Updater Modified