Network restart:
/etc/init.d/./netword restart
Turn off the PC horn with a text mode:
In SH, enter setterm -bfreq n
n is the number of HZ that emits the sound. The default is 750, when it is less than or equal to 20, your speaker is dumb.
Another parameter is: setterm -blength n this N is the length of the sound, the unit of the unit, with a value of 0-2000
Text mode starts switching to graphics mode:
When INIT starts, it will find a code line in / etc / inittab, which specifies the default run level: ID: 3: INITDEFAULT: You can change 3 to 5, and then enter the graphical interface directly.
View / Delete Service:
Chkconfig --List
Chkconfig - Del XXX
