diff ss and netstat and lsof

关于如何试用ss,netstat, lsof 命令在日常运维中.

个人看法不需要记住所有用法，记住最常用组合+参数意思

 

ss  -tlnp  

ss | head -n 5

ss -tn -o 

ss -nt dst :443 or dst :80  

 

ss -t4 state established

ss -t4 state listening

 

watch -n 1 "ss -t4 state established”

 

-o show live time 

 

Netstat - tlnp | grep port/pid

Netstat -at      #display all tcp

 

-a all 

 

lsof -i :8909

lsof -p pid  #show pid opened files

 

-t tcp

-l listening

-n show ip only, don’t resolve hostname

-p program