halt - abruptly stop the system
Halt stops the system almost immediately. The users are not informed
about the things to come. Halt is logged in /usr/adm/wtmp and in
/usr/adm/log, if these files exist. Halt should only be run by the
super-user, any other caller will be refused.
Halt is a rather rude program. Shutdown(8) is preferred for it performs
a more gentle halt routine.
Halt -f is even worse, it omits the terminate signals that are normally
sent first to all processes to give them a chance to die peacefully.
reboot(2), shutdown(8), reboot(8), boot(8).
Edvard Tuinder (firstname.lastname@example.org.NL)