Linux common commands (high personal use frequency)

1, log view

tail (cat) -f| grep

tail (CAT)  + (any number of rows)-f| grep

2, view catalogue & Authorization

ll (can compare the detailed presentation file directory)
chmod751  filepathchmod755 filepath

3, show process

PS -ef| grep Java--------enumerating Java processes

Top--------------+ f-------------------Reverse selection (remove an option)

4,RPM Package Software Related

rpm-qa| grep  -e xxx (package full name)yuminstall  -ivh xxx (Package): Install RPM Package

5, Statistical network connection (useful when querying an IP for excessive database connections)

netstat-na| grep 192.168. 15.88 -C statistics IP is 192. 168.15. 88 Number of connections

Linux common commands (high personal use frequency)