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Useful Linux Commands

Posted by Kylin Soong on Aug 13, 2014 categorized as linux

This Document Contain a series useful linux commands which used by me every day.

How to create alternatives java

which java
ls -l /usr/bin/java
ls -l /etc/alternatives/java
rm /etc/alternatives/java
ln -s /usr/java/jdk1.7.0_10/bin/java /etc/alternatives/java

Check the Number of connections in one port

netstat -anp | grep :3306 | grep ESTABLISHED | wc -l
netstat -anp | grep :3306 | grep ESTABLISHED 
netstat -anp | grep :3306 

Change hostname

# hostnamectl set-hostname --static pc.ksoong.org
# hostname

Printers

- edit /etc/cups/cupsd.conf
- add "BrowsePoll pc.ksoong.org" line to the end
- restart cups service