Linux Startup Script

Debian: create the init.d script, placed in /etc/init.d/, then run the following to set it up for automatic startup at boot time.

update-rc.d <script name> defaults 20

Redhat:

chkconfig

[root@bigboy tmp]# chkconfig --list
keytable 0:off 1:on  2:on  3:on 4:on  5:on 6:off
atd      0:off 1:off 2:off 3:on 4:on  5:on 6:off
syslog   0:off 1:off 2:on  3:on 4:on  5:on 6:off
gpm      0:off 1:off 2:on  3:on 4:on  5:on 6:off
kudzu    0:off 1:off 2:off 3:on 4:on  5:on 6:off
wlan     0:off 1:off 2:on  3:on 4:on  5:on 6:off
sendmail 0:off 1:off 2:off 3:on 4:off 5:on 6:off
netfs    0:off 1:off 2:off 3:on 4:on  5:on 6:off
network  0:off 1:off 2:on  3:on 4:on  5:on 6:off
random   0:off 1:off 2:on  3:on 4:on  5:on 6:off

Chkconfig Examples

You can use chkconfig to change runlevels for particular packages. Here we see Sendmail will start with a regular startup at runlevel 3 or 5. Let’s change it so that Sendmail doesn't startup at boot. Use Chkconfig To Get A Listing Of Sendmail's Current Startup Options

[root@bigboy tmp]# chkconfig --list | grep mail
sendmail 0:off 1:off 2:off 3:on 4:off 5:on 6:off 

[root@bigboy tmp]# chkconfig --level 35 sendmail off 

Doublecheck That Sendmail Will Not Startup

[root@bigboy tmp]# chkconfig --list | grep mail
sendmail 0:off 1:off 2:off 3:off 4:off 5:off 6:off

Turn it back on again

[root@bigboy tmp]# chkconfig --level 35 mail on
[root@bigboy tmp]# chkconfig --list | grep mail
sendmail 0:off 1:off 2:off 3:on 4:off 5:on 6:off