Monday, March 22, 2010
Minimal Centos 5 Server install
You only need CD #1 to do the basic install.
Minimal Install Steps
1. Boot to CD #1
2. At the Boot: prompt, type in "linux text" to get the text installation setup
3. Proceed normally with the installation until it asks which packages to install
4. Deselect all of the packages and then click on the "customize package selection" check box
5. Hold down the "-" (dash) key, which scrolls through all of the package options and deselects them all
6. Finish the installation
7. Do a "yum update" to get latest versions of everything
8. Do a "yum install " for what ever other packages you need
Free Resources on a Server:
chkconfig anacron off
chkconfig apmd off
chkconfig atd off
chkconfig autofs off
chkconfig cpuspeed off
chkconfig cups off
chkconfig cups-config-daemon off
chkconfig gpm off
chkconfig isdn off
chkconfig netfs off
chkconfig nfslock off
chkconfig openibd off
chkconfig pcmcia off
chkconfig portmap off
chkconfig rawdevices off
chkconfig readahead_early off
chkconfig rpcgssd off
chkconfig rpcidmapd off
chkconfig smartd off
chkconfig xfs off
chkconfig ip6tables off
chkconfig avahi-daemon off
chkconfig firstboot off
chkconfig yum-updatesd off
chkconfig sendmail off
chkconfig mcstrans off
chkconfig pcscd off
chkconfig bluetooth off
chkconfig hidd off
NOTES:
The next group of services is more useful to servers.
--- xinetd
- may be needed for some servers
--- acpid
- needed for power button to shut down server gently
--- microcode_ctl
- not needed on AMD machines
--- irqbalance
- not needed unless running SMP
- multiple cores, multiple processors, hyperthreading
--- haldaemon and messagebus
- support for plug and play devices
--- mdmonitor
- not needed unless running software RAID
Evaluate their worth even more closely before disabling them.
chkconfig xinetd off
chkconfig acpid off
chkconfig microcode_ctl off
chkconfig irqbalance off
chkconfig haldaemon off
chkconfig messagebus off
chkconfig mdmonitor off
Run the following to see what else is enabled:
chkconfig --list |grep "3:on" |awk '{print $1}' |sort
If you want to compare the list before and after, you can:
chkconfig --list |grep "3:on" |awk '{print $1}' |sort > before
and
chkconfig --list |grep "3:on" |awk '{print $1}' |sort > after
Virtual Terminals
You may also minimize the virtual terminals. The default is six virtual terminals. You
can probably do with two.
To disable them, edit the /etc/inittab file and comment out the ones that you don't
want running like this:
# 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
Updating system and Rebooting
yum update
init 6
References:
http://www.sonoracomm.com/support/18-support/202-centos-min
http://www.sonoracomm.com/support/18-support/114-minimal-svcs
http://www.hscripts.com/tutorials/linux-services/
Minimal Install Steps
1. Boot to CD #1
2. At the Boot: prompt, type in "linux text" to get the text installation setup
3. Proceed normally with the installation until it asks which packages to install
4. Deselect all of the packages and then click on the "customize package selection" check box
5. Hold down the "-" (dash) key, which scrolls through all of the package options and deselects them all
6. Finish the installation
7. Do a "yum update" to get latest versions of everything
8. Do a "yum install " for what ever other packages you need
Free Resources on a Server:
chkconfig anacron off
chkconfig apmd off
chkconfig atd off
chkconfig autofs off
chkconfig cpuspeed off
chkconfig cups off
chkconfig cups-config-daemon off
chkconfig gpm off
chkconfig isdn off
chkconfig netfs off
chkconfig nfslock off
chkconfig openibd off
chkconfig pcmcia off
chkconfig portmap off
chkconfig rawdevices off
chkconfig readahead_early off
chkconfig rpcgssd off
chkconfig rpcidmapd off
chkconfig smartd off
chkconfig xfs off
chkconfig ip6tables off
chkconfig avahi-daemon off
chkconfig firstboot off
chkconfig yum-updatesd off
chkconfig sendmail off
chkconfig mcstrans off
chkconfig pcscd off
chkconfig bluetooth off
chkconfig hidd off
NOTES:
The next group of services is more useful to servers.
--- xinetd
- may be needed for some servers
--- acpid
- needed for power button to shut down server gently
--- microcode_ctl
- not needed on AMD machines
--- irqbalance
- not needed unless running SMP
- multiple cores, multiple processors, hyperthreading
--- haldaemon and messagebus
- support for plug and play devices
--- mdmonitor
- not needed unless running software RAID
Evaluate their worth even more closely before disabling them.
chkconfig xinetd off
chkconfig acpid off
chkconfig microcode_ctl off
chkconfig irqbalance off
chkconfig haldaemon off
chkconfig messagebus off
chkconfig mdmonitor off
Run the following to see what else is enabled:
chkconfig --list |grep "3:on" |awk '{print $1}' |sort
If you want to compare the list before and after, you can:
chkconfig --list |grep "3:on" |awk '{print $1}' |sort > before
and
chkconfig --list |grep "3:on" |awk '{print $1}' |sort > after
Virtual Terminals
You may also minimize the virtual terminals. The default is six virtual terminals. You
can probably do with two.
To disable them, edit the /etc/inittab file and comment out the ones that you don't
want running like this:
# 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
Updating system and Rebooting
yum update
init 6
References:
http://www.sonoracomm.com/support/18-support/202-centos-min
http://www.sonoracomm.com/support/18-support/114-minimal-svcs
http://www.hscripts.com/tutorials/linux-services/
