Bu Blogda Ara

6 Şubat 2009 Cuma

Centos Servisleri ve ne işe yaradıkları

acpid - off Advanced Configuration and Power Interface
event daemon. Shutdown applications if the power fails.

aep1000 - off AEP1000/AEP2000 coprocessor driver.

anacron - off Cron-like, but doesn't assume that the
machine is always on.

apmd - off Advanced Power Management. Only on for your
UPS to shutdown your computer when the power fails.

atd - off Run jobs queued for later execution by "at".

autofs - off Auto mount CDs and other file system-like
devices and media.

bcm5820 - off Hardware cryptographic accelerator support for
the BCM5820 Cryptonet driver.

cpuspeed - on for laptops, off for desktop computers.

crond - on Runs regularly scheduled system tasks, e.g. a
task that runs once a day.

cups - on Common Unix Printing System. Necesary if you
want to print.

cups-config-daemon - off(?) Works with HAL to dynamically manage printer
configuration. Might overwrite
/etc/cups/cupsd.conf. See:

cxoffice - off Probably runs automatically if you have
Crossover Office and run an installed Windows application.

dc_client - off Distributed session cache client proxy.

dc_server - off Distributed session cache server.

gpm - off unless you want mouse cut/paste on the
non-graphical console.

haldaemon - on Auto-recognizes various kinds of hardware and
mountable media.

httpd - off The Apache web server. Only on if you need a
web server.

iptables - on The firewall.

irda - off Infrared wireless device daemon. For PDA, etc.

irqbalance - on If you have a multiprocessor system. Off on
all single cpu machines.

isdn - off Only used if you have an ISDN network connection.
kudzu - off Detects and configures new and/or changed
hardware on a system. Can be run manually if you need it.

lisa - off Scans your network to provide information
about hosts on your network, perhaps including
Windows shares. Some versions have security
problems. Part of kdenetwork utilities.

lm_sensors - off Monitor system sensors such as CPU and
motherboard temperature.

mDNSResponder - off Publishes and browses available network
services via Zeronconf (aka "Rendezvous").

mdmonitor - off Part of the mdadm package to administer
software RAID. See rpm -qi mdadm

mdmpd - off Monitor MD multipath devices, e.g. disks with
more than one controller. Apparently only for
RAID arrays.

messagebus - on Provides a communication bus for dbus. Programs
talk to other programs. Probably leave enabled.

microcode_ctl - on for Intel CPUs, off for AMD processors. Only works on Intel CPUs
(doesn't work with AMD). I'm not clear what the
updated microcode does. You can find out your cpu
info on Linux systems with this command:
cat /proc/cpuinfo
More info at:

mysqld - off A crash prone, slow, non-standard SQL
database server.

named - off A DNS server.

netdump - off Only for diagnosing kernel crashes.

netfs - off Automatically Mounts and unmounts all Network
File System (NFS), SMB/CIFS (Lan
Manager/Windows), and NCP (NetWare) mount points.
This is the only thing you need if you are an NFS
client (e.g. not an NFS server), since netfs will
run any other necessary daemons. Netfs may
automatically handle everything necessary for the
other (non-NFS) protocols, but I've only tested
it with NFS. Disable this if you don't use NFS,
Samba, or NetWare.

netplugd - off Automatic recognition of active/inactive
network interfaces.

network - on if you have an Ethernet connection. Off for
modem users.

nfs - off Network File System. Only on to allows other
unix systems to share your hard drive (volume, file system). Not
necessary if you are a client to a shared volume.

nfslock - off Provides NFS file locking functionality.
Disable if you aren't using NFS. Required by nfs.

nifd - off Network interface monitor. Calls
mDNSResponder if your IP address changes.

nscd - off Nscd provides cacheing for the passwd(5),
group(5), and hosts(5) databases.

ntpd - off Network Time Protocol. Easier to put this in
cron: /usr/sbin/ntpdate -s -u ntp1.virginia.edu

pcmcia - on for laptop users with PCMCIA cards. Off for
desktop machines.

portmap - off Netfs will start portmap as necessary.
Portmap is DARPA port to RPC program number
mapper. Required if you are an nfs client or
server (although netfs starts portmap for
clients, so you don't need it explicitly
enabled). If you're not using NFS or NIS, then
you should disable portmap. Some (?) versions of
portmap are highly insecure. You can run `rpcinfo
-p $hostname` against your system to see what
additional services it is providing. More info

postgresql - off The most powerful, fastest, easiest to use SQL
database. Robust and has excellent documentation.

psacct - off Daemon used by several utilities for monitoring process
activities, including ac, lastcomm, accton, and sa.

readahead - off The readahead process preloads the buffer
cache with files that might be paged in one 'page
demand triggered' read at a time. This can speed
things up of boxes with enough memory. Config
file is: /etc/readahead.files

readahead_early - off See readahead. Config file is: /etc/readahead.early.files

rhnsd - off Queries the Red Hat Network for updates and

rpcgssd - off Part of the nfs-utils package. Required by nfs.

rpcidmapd - off Required if you are running an nfs server.

rpcsvcgssd - off Required by nfs.

saslauthd - off unless you are using plaintext SASL password

sendmail - off Part of the mail server. Only on if you
machine is mail server.

sgi_fam - off FAM is a file monitoring daemon that detects
when files have changed and then performs some action.

smartd - off SMART Disk Monitoring Daemon. Monitor hard
drive and predict failure.

smb - off Samba Windows file sharing server.

snmpd - off Respond to SNMP request packets. Probably
only on if another machine is monitoring the
status of your machine.

snmptrapd - off Receive and log SNMP trap messages. SNMP is
for monitoring system status.

spamassassin - off Mail filter to identify spam using text
analysis. Only for mail servers(?)

squid - off Proxy caching server for web and ftp.

sshd - off SSH daemon. On if you want to ssh into your

syslog - on Handles logging of system events. It is good
to leave this turned on. Logs autorotate and will
not fill your hard drive.

tux - off Apparently a web server.

vncserver - off Remote desktop sharing.

winbind - off Related to Samba.

xfs - on X Windows font server. Use by X windows to
support a graphical desktop (including KDE and Gnome)

xinetd - on Super daemon (aka super server), launches network related daemons
on demand.

ypbind - off Disabled unless you are using and NIS server, usually
for password authentication

yppasswdd - off yppasswdd is the RPC server that lets users
change their passwords when you are using NIS
(a.k.a. YP).

ypserv - off ypserv is an implementation of the standard
NIS/YP networking protocol.

ypxfrd - off ypxfrd should be started in addition to ypserv to
accelerate transferring yp maps.

yum - off Yellow dog Updater, Modified. Updates
software packages (rpm and/or apt
packages). Some people run it nightly, some run
it manually.

ilk kurulum için açmanız gereken ve yeterli olan servisler ise ;

# chkconfig --list |grep 3:on

acpid 3:on
apmd 3:on
cpuspeed 3:on
crond 3:on
haldaemon 3:on
ipmi 3:on
irqbalance 3:on
messagebus 3:on
network 3:on
sendmail 3:on
sshd 3:on
syslog 3:on
xinetd 3:on

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