mkdir test01
Create a file
touch test01.txt
View files (current screen display)
more test01.txt
View file (full content of file)
cat test01.txt
Modify the file
vim test01.txt
save after modification
:wq
Do not save after modification
:q!
Switch user from root to lye
su - lye
Switching from lye to root requires a password
su - root
search
grep "" test01.txt
Query for help with grep
man grep
Delete folders and contents
rm -rf test01
clear screen
clear
create user
useradd abc passwd 123
change user group
chgrp lye test01
change file owner
chown lye test01
change file permissions
chmod lye test01
Find the directory structure under a folder
find tmp -type f
View the directory structure of the current folder
pwd
unzip files
unzip mampbusi.war -d mampbusi
Query occupied ports
lsof -i:port number
netstat -apn | grep 4040
Kill the port:
kill -9 port
query service process
ps aux | grep mampbusi
View the size of all files in the current directory
ls -lht
Check the size of a certain file
ls -lh app.log
View disk space (in M)
df -m
Modify the current user password
passwd
Upload and download files (no need to install first)
installation instructions:
yum install lrzsz
Upload command:
rz
Download instructions:
sz
The downloaded content is stored under X/Y/Zmodem
Clear the content in the file
:>test.txt
>test.txt