init 和 shutdown区别（init和关机区别）.docVIP

init 和 shutdown区别（init和关机区别） Shutdown - h will first notify the current login user. The end of login. and will kill all processes (SIGTERM signal), can make the process more secure closure. Then call init 0.. Init 0 directly inside the /etc/rc.d/rc1.d to execute the script. Poweroff is the symbol of halt connection (equal to halt -p) Halt -p is in close and then turn off the power system. Halt -p -f is a direct pull electric (dont try. The consequences _^ ^) I personally feel that shutdown is relatively safe. In the Linux of some commonly used shutdown / restart commands are shutdown, halt, reboot, and init, They both can restart the system, but the internal working process of each command is different, through the The introduction, hope you can be more flexible use of various shutdown command. 1.shutdown The shutdown command can be safely shutdown system. Some users will use a direct way to cut off the power Close the Linux, this is very dangerous. Because Linux and windows are different, the running back into many So, forced shutdown may lead to the process of data loss, the system is in unstable state. And in some systems will damage the hardware equipment. While the system shutdown before using the shutdown command, the system administrator will notify all the user login system Will be closed. And the login instruction will be frozen, that new users cannot login. Direct or shutdown Delay some time before shutdown is possible, may also restart. This is by all processes (process Will receive system by signal signal decision. This makes like VI program storage time Save currently editing the document, like email mail and news news program can Normal left and so on. The shutdown performs its job is to send a signal signal to the init program, asking it to change Runlevel. Runlevel 0 is used to stop halt, runlevel 6 is used to reactivate Reboot system, runlevel 1 is used to allow the system to enter the management work can be carried out. State; this is the default,