[TOC]
Create or remove a script from running at boot or shutdown
How to make a startup script for linux/debian/ubuntu
Write a startup script and place it in /etc/init.d cd /etc/init.d/
the location of all systemd init d startup scripts (not upstart nor runit nor ?)
vi SCRIPTNAME.sh
#/bin/sh
chmod +x SCRIPTNAME.sh
ensure your script is executable
update-rc.d SCRIPTNAME.sh defaults
install the script on run levels 2,3,4, and 5 (and stop the script on 0,1,and 6)
update-rc.d -f SCRIPTNAME.sh remove
remove the script and symlinks from /etc/rc2.d and other directories even if it does not exist
Overview
control-alt-f4 allows you to see installation messages during bootup
update-rc.d is a Debian utility to install scripts.
Also, to know which runlevel you are in, use the command: runlevel
e.g. results in N 2
Runlevel 0 is Halt.
Runlevel 1 is single user mode
Runlevel 2 Basic multi-user mode (text)
Runlevel 5 Full (GUI based) multi-user mode
Runlevel 6 is reboot
FOR FUN TRY:
init 6, this will reboot the system
update-rc.d SCRIPTNAME.sh start 0123 . stop 456 .
RCS means startup , RCK means kill
update-rc.d apache2 defaults 20 80
different priorities for startup and shutdown
update-rc.d apache2 start 20 2 3 4 . start 30 5 . stop 80 0 1 6 .
start with priority 20 for runlevel 2, 3 and 4 and priority 30 for 5 and kill with priority 80 for runlevel 0, 1 and 6
/etc/inittab
The boot process uses these parameters to identify the default runlevel and the files that will be used by that runlevel. In this example, runlevel 4 is the default and the scripts that define runlevel 4 can be found in /etc/rc.d/rc.4.
(symbolic link to it from the appropriate runlevel directory ?) (or runlevel file, if that's what your system uses)
/etc/rc.d/rc.local file.
This script file is run once, before all other scripts have run but before the logon prompt appears
e.g. modprobe -r uhcimodprobe usb-uhcieciadsl-startiptable -Fiptables -A
An example Bamboo CI startup script
:::bash #!/bin/bash # Bamboo startup script # chkconfig: 2345 90 90 # description: Atlassian Bamboo
BAMBOO_USER=bamboo
#BAMBOO_HOME=/usr/local/bin/bamboo
BAMBOO_HOME=/opt/atlassian-bamboo-5.1.1/bin
start() {
echo "Starting Bamboo: "
$BAMBOO_HOME/start-bamboo.sh start
echo "done."
}
stop() {
echo "Stopping Bamboo: "
$BAMBOO_HOME/stop-bamboo.sh stop
echo "done."
}
case "$1" in
start)
start
;;
stop)
stop
;;
status)
ps aux | grep bamboo | grep -v 'grep'
;;
restart)
stop
sleep 5
start
;;
*)
echo "Usage: $0 {start|stop|restart|status}"
esac
exit 0
Alternative ways to configure startup services
Faster boot and faster machines means less packages installed and less services starting
apt-get install -y rcconf
rcconf
ERROR "rcconf needs dialog or whiptail"
apt-get install -y dialog
similar to chkconfig, a dialog/whiptail based UI to list and enable/disable services
apt-get purge brltty brltty-x11 ttf-indic-fonts-core ttf-kacst-one ttf-khmeros-core ttf-lao ttf-punjabi-fonts ttf-unfonts-core
I don't need: braille tty and true type fonts: indian, khmer, lao, korean
apt-get install rcconf bum
> rcconf is a great cli, bum has a gui and better service descriptions
# disable: openvpn (just /etc/init.d/openvpn start when needed)
# brltty: braille tty
# speech-dispatcher: voice command computer
sudo update-rc.d /etc/init.d/myscript.sh defaults 99
modify the priority (ordering) of when it is run during boot/shutdown
chkconfig --list // this will show you what services are "on" at what run levels
chkconfig servicename off //will turn it off for the runlevel that you're on...
//generally we only care about runlevel 2 for our servers
chkconfig httpd off //disable httpd service on boot
enabled services:
smartd
mctrans = selinux
restore cond
readahead_early
gpm = mouse
network
microcode ctl
messagebus
disabled:
firstboot = menu on boot to configure firewall, services, etc.
MIT = network services
sendmail = if using mail services?
finger = very old protocol/application
irda = infra red devices!
rpcidmapd
rpcgssd
mdmmonitor = software raid
portmap
pcscd
haldaemon
exim
nfslock
netfs = auto mount on boot network shares
lvm2-monitor = lvm
cpuspped = save electricity
bluetooth
ncid
hidd
pand
capi = isdn
acpi = power management (e.g. turn off hard disk when not in use)
apmd = older laptops
autofs = auto mount usb sticks
avahi = alternate to the DNS services system
hplip = hp printers
iod = same as above
rcconf is great for /etc/init.d/ jobs (which are controlled by update-rc.d)
startup jobs instead of init.d = Jobs are defined in files placed in /etc/init
http://upstart.ubuntu.com/getting-started.html
BUT for "upstart" jobs (/etc/init/JOBNAME.conf ) an easy way is to just comment out the start
sudo nano /etc/init/avahi-daemon.conf
start on (filesystem and started dbus)
/etc/init/tty1.conf
start on stopped rc RUNLEVEL=[2345]
stop on runlevel [!2345]
respawn
# exec /sbin/getty -8 38400 tty1
exec /sbin/getty -n -l /usr/sbin/leapfileconsole.pl 38400 tty1
etc/rc.d/rc.sysinit ?