Softpanorama

Home Switchboard Unix Administration Red Hat TCP/IP Networks Neoliberalism Toxic Managers
May the source be with you, but remember the KISS principle ;-)
Skepticism and critical thinking is not panacea, but can help to understand the world better

Disabling the avahi daemon

News

Redundant daemons in RHEL

Recommended Books

Recommended Links

Avahi daemon and zeroconfig protocol

The Linux USB sub-system
Linux Swap filesystem Loopback filesystem   Admin Horror Stories Linux Tips Humor

Avahi-daemon and avahi-dnsconfd

The Avahi website defines Avahi as:

 ...a system which facilitates service discovery on a local network. This means that you can plug your laptop or computer into a network and instantly be able to view other people who you can chat with, find printers to print to, or find files being shared…

Avahi is a Zeroconf implementation on Linux. Zeroconf is an Apple-based protocol which that enables users to create usable IP networks without having DNS servers. Unless you network is running Apple servers OS or is so small that there is no DNS server on it, avahi daemon is useless and I don't quite understand why it is included and enabled by default in RHEL.

Avahi makes sense mainly on desktops in networks with Apple computers. A common use of the avahi-daemon is with Rhythmbox, so you can see music that is made available to be shared with others. If you’re not sharing music or files on your system, you can turn off this daemon.

Possible drawbacks of Avahi

In case of enterprise servers with RHEL this daemon does not make any sense and can (and should) be disabled the following way

 
# chkconfig --list | grep avahi
avahi-daemon    0:off   1:off   2:off   3:on    4:on    5:on    6:off
avahi-dnsconfd  0:off   1:off   2:off   3:off   4:off   5:off   6:off

# service avahi-daemon stop
Shutting down Avahi daemon:                                [  OK  ]

# chkconfig avahi-daemon off

# chkconfig --list | grep avahi
avahi-daemon    0:off   1:off   2:off   3:off   4:off   5:off   6:off
avahi-dnsconfd  0:off   1:off   2:off   3:off   4:off   5:off   6:off

Learn more:
http://zeroconf.org


Top Visited
Switchboard
Latest
Past week
Past month

NEWS CONTENTS

Old News ;-)

[Apr 29, 2011] Disabling avahi-daemon Len

One of the things I quickly found to be bothering me is the fact that there was an apparently long and unexplicable delay for all new network connections which resembled to a dns resolving. No reason for lengthy dns resolving though. So I did a strace:
socket(PF_FILE, SOCK_STREAM, 0)         = 4
fcntl64(4, F_GETFD)                     = 0
fcntl64(4, F_SETFD, FD_CLOEXEC)         = 0
connect(4, {sa_family=AF_FILE, path="/var/run/avahi-daemon/socket"}, 110) = 0
fcntl64(4, F_GETFL)                     = 0x2 (flags O_RDWR)
fstat64(4, {st_mode=S_IFSOCK|0777, st_size=0, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7f35000_
llseek(4, 0, 0xbfa7d918, SEEK_CUR)     = -1 ESPIPE (Illegal seek)
write(4, "RESOLVE-ADDRESS 10.0.0.6\n", 25) = 25read(4,  <unfinished ...>

the results shows a connection to a avahi-daemon which I have no ideea what is good for so I should not need it. I disabled it in /etc/default/avahi-daemon

cat /etc/default/avahi-daemon # 0 = don't start, 1 = start
AVAHI_DAEMON_START=0

Hope it helps.

disabling-the-avahi-daemon

The Avahi daemon is present as default and allows you to discover network resources and get connected to them.

Its primary roles are to:

Avahi is an implementation of the Zeroconf protocol and is compatible with Apple services.

Possible drawbacks of Avahi

Disable the Avahi Daemon

Under Ubuntu 7.04

If you have no use for Avahi and you want to disable it it is not enough to disable it from the list of services. You need to:
  • Edit the /etc/default/ avahi-daemon file:
    • sudo gedit /etc/default/avahi-daemon
    • Change the line: AVAHI_DAEMON_START = 1
    • to: AVAHI_DAEMON_START = 0
  • Reboot your system
  • Note: The command sudo update-rc.d-f avahi-daemon remove is not enough to disable the Avahi Daemon.

Ubuntu 7.10

Under Debian systems

Additional information

Recommended Links

Google matched content

Softpanorama Recommended

Top articles

Sites

Avahi daemon and zeroconfig protocol



Etc

The Last but not Least Technology is dominated by two types of people: those who understand what they do not manage and those who manage what they do not understand ~Archibald Putt. Ph.D


Copyright © 1996-2018 by Dr. Nikolai Bezroukov. www.softpanorama.org was initially created as a service to the (now defunct) UN Sustainable Development Networking Programme (SDNP) in the author free time and without any remuneration. This document is an industrial compilation designed and created exclusively for educational use and is distributed under the Softpanorama Content License. Original materials copyright belong to respective owners. Quotes are made for educational purposes only in compliance with the fair use doctrine.

FAIR USE NOTICE This site contains copyrighted material the use of which has not always been specifically authorized by the copyright owner. We are making such material available to advance understanding of computer science, IT technology, economic, scientific, and social issues. We believe this constitutes a 'fair use' of any such copyrighted material as provided by section 107 of the US Copyright Law according to which such material can be distributed without profit exclusively for research and educational purposes.

This is a Spartan WHYFF (We Help You For Free) site written by people for whom English is not a native language. Grammar and spelling errors should be expected. The site contain some broken links as it develops like a living tree...

You can use PayPal to make a contribution, supporting development of this site and speed up access. In case softpanorama.org is down you can use the at softpanorama.info

Disclaimer:

The statements, views and opinions presented on this web page are those of the author (or referenced source) and are not endorsed by, nor do they necessarily reflect, the opinions of the author present and former employers, SDNP or any other organization the author may be associated with. We do not warrant the correctness of the information provided or its fitness for any purpose.

The site uses AdSense so you need to be aware of Google privacy policy. You you do not want to be tracked by Google please disable Javascript for this site. This site is perfectly usable without Javascript.

Last modified: March, 12, 2019