Linux Tips

modify file content

• vi

check file content

• cat

shutdown default firewall

[root@A cluster]# service iptables stop

modify hostname

[root@A cluster]# vi /etc/sysconfig/network

• modify file content: HOSTNAME=[your ideal hostname]

[root@A cluster]# vi /etc/hosts

• add below as an example (mylinux as hostname)

192.168.1.23 mylinux

• reboot

[root@A cluster]# init 6 (or reboot) (reboot computer to take effect)

• ref:http://www.blogjava.net/prince/archive/2007/11/08/159141.html

Delete Directory

[root@A cluster]# rm -fr [directory]

Copy through nodes

[root@A cluster]# scp root@B:[file(s)] [directory]
[root@A cluster]# scp [file(s)] root@B:[directory] 

Check GCC Version

[root@A ~]gcc --version

Kill Threads

[root@A ~]killall [thread name]

Pack a directory

[root@A ~]tar -cvf [pack name] [directory]

• ref:http://hi.baidu.com/cha369/blog/item/8341f2601c1fb248ebf8f8fa.html

Disk Space

[root@A ~]df -lh

• ref:http://hi.baidu.com/%B1%B6%B5%C0%BC%E6%B3%CC/blog/item/7476ec069db828191c9583a3.html

compress a file or files

[root@localhost logs]# tar -zcvf /target-directory/target.tar.gz catalina.out 

• ref:http://blog.csdn.net/yuyongpeng/article/details/1818717