Liunx learning 02

Because I was too busy last night and didn't have time to update my study, I want to update it in five minutes at work:

Note: Files starting with. In liunx are hidden. You can use LS-a to view

Run the previous date command: date to view the system time or change the time:

Date 0721135613.56 07-21 11: 35: 13: 56

Hwclock view motherboard time

The hwclock-W is based on the system time. Change the motherboard time.

Hwclock-S is based on the motherboard time. Change the system time.

Cal view calendar

Cal 3 2011 view calendar for January 1, March 2011

Halt, halt-P power off

Reboot restart

Shutdown and shutdown-R now restart immediately

Shutdown-R 6 seconds later restart

Shutdown-C command to cancel Shutdown

Power off

Cd ~ Username jump to the directory in username

CD... returns the upper-layer directory of the upper layer. The relative path starts with "." And the absolute path starts "/".

CD-Return to the last directory

Cd ~ Like CD