View the processes with the highest CPU usage
ps aux-l | sort -k3nr | head -K // k是想查看的数量
View the first 10 lines and the last 10 lines of the a.txt file
head -n 10 a.txt
tail -n 10 a.txt
How to filter lines containing "error" in a file
grep "error" file_name
cat file_name | grep 'error'
View a port number
netstat -anp | grep port_number
view a process
ps -ef | grep name
Create or delete a multilevel directory
mkdir -p ./a/b
rm -rf ./a
View log files dynamically
tail -f log_file
If the Xshell tool wants to upload or download files from the server, what package can be installed on the server?
yum install lrzsz
To be added. . .