Hello,
I've noticed that Fedora takes a long time to
boot, and most of it can be disabled.
A quote from
justol'bob:
Quote:
|
Originally Posted by justol'bob
There have been several threads about how Fedora may take longer to boot than you're happy with. A couple of excellent threads already exist on ways to speed up the process:
In-depth howto
BootCharts
Uber-startups!
However, you may have wondered as all the startup processes speed by: 'Do I really need all of that? What ARE those things used for?'
This 'How-to' is to answer some of those questions and to suggest which processes MIGHT be turned off and which ones MUST be left on. |
To start, let's learn a bit about the
boot processes.
Background Info
init is what starts your computer -- It loads the services and determins which ones to start in what order.
chkconfig sets the bool values (true / false) on the services to enable/disable them at startup.
service controls currently running services by starting, stopping or restarting them.
There are 7 runlevels to init, each will have a different configuration/do differnt things:
configurable mean you can edit the daemons & services that start
0 = shutdown (not configurable)
1 = single-user (not configurable)
2 = multi-user (configurable, full CLI functionality but no network, this one is usually ignored)
3 = multi-user (one of the common ones, configurable, full CLI functionality)
4 = Xen kernel (configurable, but ignored b/c not many people use it)
5 = Runlevel 3 + X Windows (configurable, most used, full graphical functionallity)
6 = reboot (not configurable)
Note that,
init,
chkconfig and
service are commands, and also that you'll need to be root first:
Now that you're root (make sure you add that space & dash after
su...), you can execute the commands:
Code:
init [0-6]
example
init 1
-------------------
Code:
chkconfig [service name] [ on | off ]
examples
chkconfig sendmail off
chkconfig nvidia-glx on
-------------------
Code:
service [service name] [ start | stop | restart ]
examples
service network restart
service wpa_supplicant start
service sendmail stop
Next, let's go into the default runlevel: This is part of the /etc/inittab file:
Code:
# Default runlevel. The runlevels used by RHS are:
... - snip - ...
#
id:3:initdefault:
Changing the number (in this case, 3 -> 5) will change your default runlevel.
Now, let's move on.
Changing your default services
If you're in the GUI, you can install an easy tool to do so:
Code:
su -
yum install system-config-services
It can now be accessed under
[System menu] > Administration > Server Settings > Services or by running
Code:
system-config-services
from the menu. I like to
[Edit Runlevel menu] > Runlevels All to let you edit runlevels 3, 4 and 5 all at once.
If you're in the terminal, you're stuck with the manual chkconfig command. Sorry.
Code:
man init
man chkconfig
man service
for more info on the commands.
Last thing I'm going to say is don't be afraid to disable services; The worst that can happen is something won't work and on reboot you simply re-enable it.
Priorities:
L = Only laptops need this.
D = Only Desktops need this.
A = All need this! Keep it enabled.
HR = Highly Recommended! But not absolutely needed. Better to keep enabled.
R = Not needed at all but nice to have.
NN = Not needed, disable at will. Keep enabled if you're using things itn it's description, though.
[ service ] : [ Description ] : [ Priority ]
NetworkManager : Best network selection :
L
acpid : Power managment :
HR
anacron : More Cron management :
HR
apmd : For laptop's battery monitoring :
L
atd : Similar to Cron's functions :
NN
autofs : Auto-detect/mount filesystems :
HR
ahavi-daemon : Zeroconf stuff :
NN
avavi-dnsconfd : DNS Zeroconf stuff :
NN
bluetooth : needed for bluetooth wireless devices to work :
NN
btseed : BitTorrent Seeding :
NN
bttrack : BitTorrent tracking :
NN
cpuspeed : dynamic CPU speed daemon :
L
crond : Automated tasks :
A
cups : Central Unix Printing System :
HR
cups-config-daemon: Central Unix Printing System through D-Bus :
HR
dc_client : SSL session cache client proxy :
NN
dc_server : SSL session server :
NN
dhcdbd : D-BUS control of ISC DHCP client :
NN
diskdump : Create Dump files if system crashes :
NN
firstboot : First-boot configuration utility :
NN after your first
boot 
gpm : Mouse support in terminals (runlevel 3) :
NN
haldaemon : Hardware Abstraction Layer :
A
hplip : HP Printer service :
A for all that use HP Printers
httpd : Apache's Web server :
NN
iptables : Firewall. Plain & Simple. :
A
isdn : Integrated Services Digital Network :
NN
kudzu : hardware probe at startup, only if you're changing hardware :
NN
lirc : Infrared controls :
NN
lisa : Similar to "Network Neighbourhood" :
R
lm_sensors : System sensor monitoring :
A that have CPU / fan sensors
mdnsresponder : Howl network :
NN
messagebus : The system-messenger dbus :
A
mysqld : MySQL's database server :
NN
named : BIND DNS server :
NN
netdump : netconsole & netcrashdump utility :
NN
netfs : Network filesystems :
HR
netplugd : Dynamic network managment :
NN
network : Network connectivity & services :
A
nifd : Network interface monitor daemon :
NN
nscd : Name service caching daemon :
NN
ntpd: Network Time Protol :
NN
nfs + nfslock : NFS servers :
NN
portmap : RPC connections, like NFS / NIS :
NN
pcmcia : Laptop PCMCIA :
L
redahead & readahead_early : Caches
boot services & therefore decreases
boot time :
A
rpcgssd : NFS v4 connection helper :
NN
rpcidmapd : NFS v4 connection helper :
NN
rpcsvcgssd : NFS v4 connection helper :
NN
saslauthd : plaintext auth in cyrus-sasl :
NN
sendmail : Mail server, although there are better ones out there I'd disable this one and install something like squirrelmail. Either way, it's enabled by default and can be disabled. :
NN
smb : The Samba or SMB server :
NN
snmpd : Simple Network Management Protocol :
NN
snmptrapd : Simple Network Management Protocol :
NN
sshd: remote SSH server :
NN
syslog : System & Kernel logger. VITAL!:
A
wpa_supplicant : Wireless auth helper :
A who use wireless
xfs : X font server. Vital to graphic functioning!:
A
xinetd : the replacement for inted, xinetd is a internet superdaemon.
HR
ati-fglrx / nvidia-glx : Livna graphics drivers services :
HR
Services you want to disable *should* be disabled in runlevels 3, 4 and 5 (the default for editing when using
chkconfig [service] [ on | off ])
Going further
See the links provided below, you can also remove all instances of the
text in /etc/grub.conf:
Code:
su -
editor /etc/grub.conf
editor is
gedit if you're in gnome,
kedit if you're in KDE. For me, it's
Code:
su -
gedit /etc/grub.conf
Then simply remove any instance of the
four letters "rhgb" and
not the entire line!
For more info (links, same as at the top):
In-depth howto
BootCharts
Uber-startups!
Enjoy the fast
boot times
Firewing1
Speed up your boot time!
Linear Mode
