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UNIX for Dummies Questions & Answers
How to exit from Linux ?
Post 826 by Neo on Sunday 21st of January 2001 10:43:07 AM
01-21-2001
Administrator
When you type <B>halt</B> the OS terminates all processes and prepares the system to shutdown the power. Normally, halt is used before a power shutdown (to add a disk, card, etc.) for any reason.
Normally, if you want to reboot and get the lilo prompt, the command is <B>shutdown -r now</B>, where "r" means reboot and "now" means now
(you could say to shutdown and reboot in 5 minutes, etc., BTW, etc.)
Also, just a word of caution, before typing these commands, it is good to do a <B>sync</B> twice or so. This flushes certain information in RAM to disk, very helpful before shutdown or reboot. Most systems do this as a part of the shutdown scripts, but it is considered good practice to do this from the command line anyway. You will develop a good habit over time of typing sync;sync
Normally, if you want to reboot and get the lilo prompt, the command is <B>shutdown -r now</B>, where "r" means reboot and "now" means now
(you could say to shutdown and reboot in 5 minutes, etc., BTW, etc.)Also, just a word of caution, before typing these commands, it is good to do a <B>sync</B> twice or so. This flushes certain information in RAM to disk, very helpful before shutdown or reboot. Most systems do this as a part of the shutdown scripts, but it is considered good practice to do this from the command line anyway. You will develop a good habit over time of typing sync;sync
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LEARN ABOUT OPENDARWIN
reboot
REBOOT(8) BSD System Manager's Manual REBOOT(8) NAME
reboot, halt -- stopping and restarting the system SYNOPSIS
halt [-lnq] reboot [-lnq] DESCRIPTION
The halt and reboot utilities flush the file system cache to disk, send all running processes a SIGTERM (and subsequently a SIGKILL) and, respectively, halt or restart the system. The action is logged, including entering a shutdown record into the wtmp(5) file. The options are as follows: -l The halt or reboot is not logged to the system log. This option is intended for applications such as shutdown(8), that call reboot or halt and log this themselves. -n The file system cache is not flushed. This option should probably not be used. -q The system is halted or restarted quickly and ungracefully, and only the flushing of the file system cache is performed (if the -n option is not specified). This option should probably not be used. Normally, the shutdown(8) utility is used when the system needs to be halted or restarted, giving users advance warning of their impending doom and cleanly terminating specific programs. SEE ALSO
wtmp(5), shutdown(8), sync(8) HISTORY
A reboot utility appeared in Version 6 AT&T UNIX. BSD
June 9, 1993 BSD