On Fedora systems the run level configuration of system services can easily be done via the gui tool system-config-services. However, in case there is no X installed this can also be done by the command line tool chkconfig:
# chkconfig --list|grep httpd httpd 0:Aus 1:Aus 2:Aus 3:Aus 4:Aus 5:Aus 6:Aus # chkconfig --level 345 httpd on # chkconfig --list|grep httpd httpd 0:Aus 1:Aus 2:Aus 3:Ein 4:Ein 5:Ein 6:Aus # chkconfig --level 345 httpd off # chkconfig --list|grep httpd httpd 0:Aus 1:Aus 2:Aus 3:Aus 4:Aus 5:Aus 6:Aus
This works also on Mandriva and Opensuse. On Ubuntu, which is Debian based, there is a similar tool available, sysv-rc-conf:
# sysv-rc-conf --list|grep cups cupsys 1:off 2:off 3:off 4:off 5:off # sysv-rc-conf --level 345 cupsys on # sysv-rc-conf --list|grep cups cupsys 1:off 2:off 3:on 4:on 5:on
Of course on all systems you can still manually create symlinks to control the start and stop times of the services.
/home/liquidat 
You could also write this simplier command:
chkconfig –list httpd
You can also use ‘ntsysv’ on Fedora/Redhat machines.
Thanks for the tip, I wondered how to do this.
Another interesting command in Fedora is the ‘service’ command. Check it out.
On debian like, people use update-rc.d, as sysv-rc-conf is not installed by default ( that’s the first time i heard, i guess i will give a try ).
And to be complete, the command is update-rc on gentoo, and so far, I think it has one of the saner interface I have seen. You can name the various “runlevel”, and you simply tell ” update-rc add foo default” to start it with default runlevel, without checking /etc/inittab to see what is the default.