Difference between revisions of "Netctl"

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{{Article summary text|A guide to configuring the network using netctl and network profile scripts.}}
 
{{Article summary text|A guide to configuring the network using netctl and network profile scripts.}}
 
{{Article summary end}}
 
{{Article summary end}}
 
==Intro==
 
 
Netctl is a new Arch project slated to replace [[netcfg]].  Users should regard it as the future of CLI-based network management on Arch Linux.
 
Netctl is a new Arch project slated to replace [[netcfg]].  Users should regard it as the future of CLI-based network management on Arch Linux.
  

Revision as of 04:45, 5 March 2013

Template:Article summary start Template:Article summary text Template:Article summary end Netctl is a new Arch project slated to replace netcfg. Users should regard it as the future of CLI-based network management on Arch Linux.

Installation

Netctl is currently in [testing]. Users are encouraged to download it from their favorite mirror.

Recommended Reading

Considerable effort has gone into the construction of quality man pages. Users are encouraged to read the following man pages prior to using netctl:

  • netctl
  • netctl.profile
  • netctl.special

Configuration

Netctl uses simple text profiles. Example profiles are provided for users to use as a template under /etc/netctl/examples. Common configurations include:

  • ethernet-dhcp
  • ethernet-static
  • wireless-wpa-static

To use an example profile, simply copy it to /etc/netctl/<profile> and edit:

# cp /etc/netctl/examples/ethernet-static /etc/netctl/my-static-network

For Users Migrating from Netcfg

Netctl uses /etc/netctl to store its profiles whereas netcfg used /etc/network.d for the same purpose.

In order to migrate from netcfg, at least the following is needed:

  • Move network profile files to the new directory.
  • Rename variables therein according to netctl.profile(5) (most have only become CamelCase i.e CONNECTION= becomes Connection=).
  • Unquote interface variables and other variables that don't strictly need quoting (this is mainly a style thing).
  • Run netctl enable <profile> for every profile in the old NETWORKS array. 'last' doesn't work this way, see netcfg.special(7).
  • Use netctl list / netctl start <profile> instead of netcfg-menu. wifi-menu remains available.

Password Encryption (256-bit PSK)

Users not wishing to have their passwords stored in plain text have the option of generating a 256-bit Encrypted PSK.

If you have not done so already, install wpa_actiond from the core repository using pacman

 $ pacman -Syu wpa_actiond

Next, generate your 256-bit Encrypted PSK using wpa_passphrase:

Usage: wpa_passphrase [ssid] [passphrase]
$ wpa_passphrase archlinux freenode

In a second terminal window copy the example file wireless-wpa from /etc/netctl/examples/ to /etc/netctl/.

# cp /etc/netctl/examples/wireless-wpa /etc/netctl/wireless-wpa

You will then need to edit /etc/netctl/wireless-wpa using your favorite text editor and add the Encrypted Pre-shared Key that was generated early using wpa_passphrase to the Key variable of this profile.

Once completed your network profile wireless-wpa containing a 256-bit Encrypted PSK should resemble:

/etc/netctl/wireless-wpa
Note: Make sure to use the special non-quoted rules for Key= that are explained at the end of netctl.profile(5)
Description='A simple WPA encrypted wireless connection using 256-bit Encrypted PSK' Interface=wlp2s2 Connection=wireless Security=wpa IP=dhcp ESSID=archlinux Key=\"64cf3ced850ecef39197bb7b7b301fc39437a6aa6c6a599d0534b16af578e04a

Support

Official announcement thread: https://bbs.archlinux.org/viewtopic.php?id=157670