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219 lines
5 KiB
Text
219 lines
5 KiB
Text
= Network Manager Quick Reference
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Peter Boy (pboy); The Fedora Docs Team
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:revnumber: F37 onwards
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:revdate: 2023-08-29
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:category: Administration
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:tags: How-to, Network, NetworkManager, Quick Refeence
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//:page-aliases:
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== NetworkManager status
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Overall status of NetworkManager::
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+
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----
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$ nmcli general status
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----
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Display active connections::
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----
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$ nmcli connection show --active
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----
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Display all configured connections::
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----
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$ nmcli connection show configured
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----
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== Connect/disconnect to an already configured connection
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Connect to a configured connection by name::
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----
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$ nmcli connection up id <connection_name>
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----
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Disconnection by name::
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----
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$ nmcli connection down id <connection_name>
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----
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== Wi-Fi
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Get Wi-Fi status::
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----
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$ nmcli radio wifi
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----
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Turn Wi-Fi on or off::
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----
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$ nmcli radio wifi _on|off_
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----
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Available access points (AP)::
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----
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$ nmcli device wifi list
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----
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Refresh the previous list::
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----
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$ nmcli device wifi rescan
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----
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Create a new connection to an open AP::
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----
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$ nmcli device wifi connect <SSID|BSSID>
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----
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Create a new connection to a protected AP::
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----
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$ nmcli device wifi connect <SSID|BSSID> password <password>
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----
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== Network interfaces
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List available devices and their status::
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----
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$ nmcli device status
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----
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Disconnect an interface::
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----
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$ nmcli device disconnect iface <interface>
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----
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== Create or modify a connection
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To create a new connection using an interactive editor
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----
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$ nmcli connection edit con-name <name_of_new_connection>
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----
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To edit an already existing connection using an interactive editor:
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----
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$ nmcli connection edit <connection_name>
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----
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[[exampletutorial]]
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=== Example/Tutorial
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Create a new connection:
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----
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$ nmcli connection edit con-name _name of new connection_
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----
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It asks us to define a connection type:
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----
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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
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Enter connection type:
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----
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In this example, we use ethernet:
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Enter connection type: ethernet
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----
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The following message appears, note that `nmcli>` is a prompt and that it lists the main settings available:
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----
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===| nmcli interactive connection editor |===
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Adding a new '802-3-ethernet' connection
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Type 'help' or '?' for available commands.
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Type 'describe [<setting>.<prop>]' for detailed property description.
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You may edit the following settings: connection, 802-3-ethernet (ethernet), 802-1x, ipv4, ipv6
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nmcli>
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----
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Edit the setting `ipv4`:
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----
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nmcli> goto ipv4
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----
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Note that after this our prompt has changed to indicate that we are currently editing the `ipv4` setting:
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----
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nmcli ipv4>
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List available properties under the `ipv4` setting and describe the `method` property:
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nmcli ipv4> describe
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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
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Property name?
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Property name? method
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----
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Set property `method` to `auto`:
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----
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nmcli ipv4> set method auto
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----
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The `ipv4` setting is now finished. Go back to the main level. Enter the following command until the prompt looks like `nmcli>`:
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----
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nmcli ipv4> back
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----
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To list the main settings again, use the `goto` command without any arguments. After that, press `Enter` and ignore the error.
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----
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nmcli> goto
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Available settings: connection, 802-3-ethernet (ethernet), 802-1x, ipv4, ipv6
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Setting name?
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----
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It is possible to set a value for a property directly from the main level:
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----
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nmcli> set __setting__.__property__ _value_
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----
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For example:
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----
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nmcli> set connection.autoconnect TRUE
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nmcli> set connection.interface-name _interface name this connection is bound to_
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nmcli> set ethernet.cloned-mac-address _Spoofed MAC address_
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----
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Finally, check the connection details, save and exit:
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----
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nmcli> print
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nmcli> save
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nmcli> quit
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----
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=== Manually editing
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To manually edit an `ifcfg` connection configuration, open or create with a text editor the configuration file of the connection located in `/etc/sysconfig/network-scripts/ifcfg-`.
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A description of most common configuration options is available in the link:https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/6/html/deployment_guide/s1-networkscripts-interfaces[RHEL6 Deployment Guide].
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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:
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----
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$ cat /etc/sysconfig/network-scripts/keys-__connection name__
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WPA_PSK='password'
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----
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Or, if using keyfile, simply edit the connection file located inside `/etc/NetworkManager/system-connections/`
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Finally, save the files and to apply changes to an already active connection execute.
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----
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nmcli connection up id _connection name_
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----
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[[delete-a-connection-configuration]]
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== Delete a connection configuration
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Delete the connection:
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----
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nmcli connection delete id <connection_name>
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----
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Please note that this also deactivates the connection.
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