= NetworkManager Command Line Interface (nmcli)

[[description]]
== Description

`nmcli` is a tool that allows NetworkManager management from command line.

[[networkmanager-status]]
== NetworkManager status

Display overall status of NetworkManager

[source,bash,subs="+quotes"]
----
$ nmcli general status
----

Display active connections

[source,bash]
----
$ nmcli connection show --active
----

Display all configured connections

[source,bash]
----
$ nmcli connection show configured
----

[[connectdisconnect-to-an-already-configured-connection]]
== Connect/disconnect to an already configured connection

Connect to a configured connection by name

[source,bash,subs="+quotes"]
----
$ nmcli connection up id _connection name_
----

Disconnection by name

[source,bash,subs="+quotes"]
----
$ nmcli connection down id _connection name_
----

[[wifi]]
== Wifi

Get Wifi status

[source,bash]
----
$ nmcli radio wifi
----

Turn wifi on or off

[source,bash,subs="+quotes"]
----
$ nmcli radio wifi _on|off_
----

List available access points(AP) to connect to

[source,bash]
----
$ nmcli device wifi list
----

Refresh previous list

[source,bash]
----
$ nmcli device wifi rescan
----

Create a new connection to an open AP

[source,bash,subs="+quotes"]
----
$ nmcli device wifi connect _SSID|BSSID_
----

Create a new connection to a password protected AP

[source,bash,subs="+quotes"]
----
$ nmcli device wifi connect _SSID|BSSID_ password _password_
----

[[network-interfaces]]
== Network interfaces

List available devices and their status

[source,bash]
----
$ nmcli device status
----

Disconnect an interface

[source,bash,subs="+quotes"]
----
$ nmcli device disconnect iface _interface_
----

[[create-or-modify-a-connection]]
== Create or modify a connection

To create a new connection using an interactive editor

[source,bash,subs="+quotes"]
----
$ nmcli connection edit con-name _name of new connection_
----

To edit an already existing connection using an interactive editor

[source,bash,subs="+quotes"]
----
$ nmcli connection edit _connection name_
----

[[exampletutorial]]
=== Example/Tutorial

Let's create a new connection

[source,bash,subs="+quotes"]
----
$ nmcli connection edit con-name _name of new connection_
----

It will ask us to define a connection type

[source,bash]
----
Valid connection types: 802-3-ethernet (ethernet), 802-11-wireless (wifi), wimax, gsm, cdma, infiniband, adsl, bluetooth, vpn, 802-11-olpc-mesh (olpc-mesh), vlan, bond, team, bridge, bond-slave, team-slave, bridge-slave
Enter connection type: 
----

In this example we will use ethernet

[source,bash]
----
Enter connection type: ethernet
----

Next this will appear, note that `nmcli>` is a prompt and that it lists the main settings available

[source,bash]
----
===| nmcli interactive connection editor |===

Adding a new '802-3-ethernet' connection

Type 'help' or '?' for available commands.
Type 'describe [<setting>.<prop>]' for detailed property description.

You may edit the following settings: connection, 802-3-ethernet (ethernet), 802-1x, ipv4, ipv6
nmcli> 
----

We will edit the setting `ipv4`

[source,bash]
----
nmcli> goto ipv4
----

Note that after this our promt has changed to this to indicate that we are currently editing the "ipv4" setting

[source,bash]
----
nmcli ipv4>
----

List available properties under the setting `ipv4` and describe the property `method`

[source,bash]
----
nmcli ipv4> describe

Available properties: method, dns, dns-search, addresses, routes, ignore-auto-routes, ignore-auto-dns, dhcp-client-id, dhcp-send-hostname, dhcp-hostname, never-default, may-fail
Property name?

Property name? method
----

Let's set property `method` to `auto`

[source,bash]
----
nmcli ipv4> set method auto
----

Now that we have finished editing the `ipv4` setting let's go back to the main level.
Execute the following command until the prompt looks like this `nmcli>`

[source,bash]
----
nmcli ipv4> back
----

If you need to list again the main settings use the `goto` command without any arguments.
After that just press enter and ignore the error.

[source,bash]
----
nmcli> goto

Available settings: connection, 802-3-ethernet (ethernet), 802-1x, ipv4, ipv6
Setting name?
----

It is possible to set a value for a property directly from the main level

[source,bash]
----
nmcli> set __setting__.__property__ _value_
----

For example:
[source,bash,subs="+quotes"]
----
nmcli> set connection.autoconnect TRUE

nmcli> set connection.interface-name _interface name this connection is bound to_

nmcli> set ethernet.cloned-mac-address _Spoofed MAC address_
----

Finally check the connection details, save and exit

[source,bash]
----
nmcli> print

nmcli> save

nmcli> quit
----

[[manually-editing]]
=== Manually editing

To manually edit a ifcfg connection configuration open or create with a text editor the configuration file of the connection located in `/etc/sysconfig/network-scripts/ifcfg-`

A description of most common configuration options is available at: http://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Deployment_Guide/s1-networkscripts-interfaces.html

To modify a connection password open with a text editor and edit the file `keys-` located in `/etc/sysconfig/network-scripts/`.
The password is stored in plain text.
For example

[source,bash,subs="+quotes"]
----
$ cat /etc/sysconfig/network-scripts/keys-__connection name__
WPA_PSK='password'
----

Or if using keyfile, simply edit the connection file located inside `/etc/NetworkManager/system-connections/`

Finally save the files and to apply changes to an already active connection execute

[source,bash,subs="+quotes"]
----
nmcli connection up id _connection name_
----

[[delete-a-connection-configuration]]
== Delete a connection configuration

Delete the connection

[source,bash,subs="+quotes"]
----
nmcli connection delete id _connection name_
----

Please note this also deactivates the connection.

[[documentation-for-networkmanager-command-line-interface-nmcli]]
== Documentation for NetworkManager Command Line Interface nmcli

The primary reference for nmcli are the manual pages nmcli and nmcli-examples.
For a quick reference, the user can type `nmcli help` to print the supported options and commands.
The help parameter can also be used to obtain a more detailed description for the individual commands.
For example `nmcli connection help` and `nmcli connection add help` show a description for the possible connection operations and for how to add connections, respectively.

The newest version of the manual page can be found on https://developer.gnome.org/NetworkManager/unstable/nmcli.html[nmcli] and https://developer.gnome.org/NetworkManager/unstable/nmcli-examples.html[nmcli-examples].

[[notes]]
=== Notes

nmcli maybe contain some bugs and lack some features graphical tools for NetworkManager have.

To see all available options for your version of nmcli

[source,bash]
----
$ info nmcli
----

See a typo, something missing or out of date, or anything else which can be improved?
Edit this document at https://pagure.io/fedora-docs/quick-docs.
