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Linux Admin…sebuah coba-coba command part 1

August 4, 2007

untuk melihat system yang bekerja di linux ketik :

chkconfig

atau dapat juga ketik command :
mcc (Mandriva)
ntsysv (RedHat)
yast (Suse)

untuk melihat boot yang dilakukan oleh linux :

vi /etc/inittab

=====================================================================================

#
# inittab This file describes how the INIT process should set up
# the system in a certain run-level.
#
# Author: Miquel van Smoorenburg, <miquels@drinkel.nl.mugnet.org>
# Modified for RHS Linux by Marc Ewing and Donnie Barnes
#

# Default runlevel. The runlevels used by Mandriva Linux are:
# 0 – halt (Do NOT set initdefault to this)
# 1 – Single user mode
# 2 – Multiuser, without NFS (The same as 3, if you do not have networking)
# 3 – Full multiuser mode
# 4 – unused
# 5 – X11
# 6 – reboot (Do NOT set initdefault to this)
#
id:5:initdefault: >>>>>>> 5 berarti load akan ke grafis atau X11 atau level 5,
bila diganti dengan 6 maka load pertama akan run level 6 atau langsung restart trus berulang

# System initialization.
si::sysinit:/etc/rc.d/rc.sysinit

l0:0:wait:/etc/rc.d/rc 0
l1:1:wait:/etc/rc.d/rc 1
l2:2:wait:/etc/rc.d/rc 2
l3:3:wait:/etc/rc.d/rc 3
l4:4:wait:/etc/rc.d/rc 4
l5:5:wait:/etc/rc.d/rc 5
l6:6:wait:/etc/rc.d/rc 6

# Trap CTRL-ALT-DELETE
ca::ctrlaltdel:/sbin/shutdown -t3 -r now

# When our UPS tells us power has failed, assume we have a few minutes
# of power left. Schedule a shutdown for 2 minutes from now.
# This does, of course, assume you have powerd installed and your
# UPS connected and working correctly.
pf::powerfail:/sbin/shutdown -f -h +2 “Power Failure; System Shutting Down”

# If power was restored before the shutdown kicked in, cancel it.
pr:12345:powerokwait:/sbin/shutdown -c “Power Restored; Shutdown Cancelled”

# Run gettys in standard runlevels
1:2345:respawn:/sbin/mingetty tty1
2:2345:respawn:/sbin/mingetty tty2
3:2345:respawn:/sbin/mingetty tty3
4:2345:respawn:/sbin/mingetty tty4
5:2345:respawn:/sbin/mingetty tty5
6:2345:respawn:/sbin/mingetty tty6
8:2345:respawn:/sbin/mingetty tty8

# Single user mode

=====================================================================================

untuk mengembalikan id:6:initdefault: (run level 5 diganti jadi run level 6/reboot) maka pada
LILO
Esc
linux single

GRUB
klik edit (e)pada pilihan pertama
pada kernel, ketik e untuk edit lalu tambahkan kata single
misal :
…..788 single

maka linux akan run level 1, lalu edit kembali

vi /etc/inittab

dan ganti id:6:initdefault: menjadi id:5:initdefault:
lalu reboot

From → Linux

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