What are Daemons and what do they do?
Daemons are services that run in the background to provide various functions not provided by the operating system kernel. Most daemons are started during your linux boot process and remain running for the duration of your linux session but it is possible to start and stop services during a session (therefore linux does not need to be rebooted when you install new software).
The following are some of the common daemons:
- atd
- future task scheduler
- amd
- automatically mounts file systems
- anacron
- runs scheduled jobs that were missed because the system was down when they were scheduled
- apmd
- power management server
- arpwatch
- converts network card addresses to IP addresses
- autofs
- mount file systems on demand
- crond
- runs regularly scheduled tasks
- cups
- printing system
- gpm
- gives mouse access in text mode
- httpd
- Apache web server
- identd
- allows you to tell which user is using a particular network connection
- inetd
- internet super server
- innd
- news server
- ipop3
- mail delivery server
- ipchains
- firewall and proxy server
- lpd
- line printer
- named
- domain name server
- netfs
- mounts unix, windows, and netware file shares
- network
- starts network interface (required for linux to run)
- nfs
- network file system
- nfslock
- file locking for nfs
- pcmia
- pc card services
- postfix
- mail server
- postgresql
- sql database server
- pppoe
- ppp over ethernet for adsl
- proftpd
- ftp server
- random
- random number generator
- routed
- provides routing services
- sendmail
- email server
- sound
- sound support
- smb
- samba server
- snmpd
- simple network management protocol support
- squid
- web cache and proxy server
- sshd
- encrypted remote access support
- swat
- web based admin tool for samba
- syslog
- logs important events that occur on your system
- telnet
- provides telnet access
- usb
- provides usb support
- ypbind
- prerequisite for nis
- webadmin
- web based system administration
- wu-ftpd
- another ftp server
- xfs
- provides truetype, type 1 and other fonts
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