Frequently used Linux commands

c	d	f	g	i	l	m	n	p	r	s
t	u	v	w

c
cat	View the contents of a file
cd	Move the directory
chgrp	Change the group to which files and directories belong.
chkconfig	Control service registration, deletion, and service startup.
chmod	Change permissions on files and directories
chown	Change the owner of a file or directory
cp	Copying files and directories
d
date	View, set, and change the current date and time.
df	Aggregate and display the size of free disk space.
dmesg	Display system messages at startup
dstat	Real-time monitoring of server resources
du	Check and display usage by directory.
f
free	Checking the memory status of Linux
g
groupadd	Add a group
i
ifconfg	Check the operation status of the network interface.
l
last	Display the history of logins to the system.
logout	Logging out
ls	Display a list of files in a directory
m
mkdir	Create a directory
mv	Move or rename a file
n
netstat	Display the current network information
ntpdate	Set the server time.
p
passwd	Change your password
ping	Check for communication with hosts on the network.
ps	View and check the status of processes in a list
pstree	Display the process in a tree view
pwd	Display the current directory
r
rm	Delete a file or directory
rpm	Managing RPM package
s
sed	Convert characters
shutdown	Shut down and reboot the system.
source	Reflect the shell configuration file.
su	Switch to another user
t
tail	Display the contents of a file only at the end.
tar	Create/Restore Archives
tcpdump	Capture packets
top	View running processes in real time.
u
useradd	Add a user
v
vmstat	Display the load rate and usage status of memory and CPU.
w
w	Show user information while logged in
wget	Download files by specifying URL
who	Find out which users are logged in.

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