Basic operation under Linux 03 (System command) __linux

1. View Host Name
Hostname


2. Modify host name (invalid after reboot)
Hostname Hadoop


3. Modify host name (permanent after reboot)
Vi/ect/sysconfig/network


4. Modify IP (invalid after reboot)
Ifconfig eth0 192.168.12.22


5. Modify IP (permanent after reboot)
Vi/etc/sysconfig/network-scripts/ifcfg-eth0


6. View System Information
Uname-a
Uname-r


7. View ID Command
Id-u
Id-g


8. Date
Date
Date +%y-%m-%d
Date +%t
Date +%y-%m-%d ""%T


9. Calendar
Cal 2012


10. View file Information
File filename


11. Mount the hard drive
Mount
Umount
Load Windows share
Mount-t CIFS//192.168.1.100/tools/mnt


12. View File Size
Du-h
Du-ah


13. View Partitions
Df-h


14.ssh
SSH hadoop@192.168.1.1


15. Shutdown Machine
Shutdown-h Now/init 0
Shutdown-r Now/reboot