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← Revision 6 as of 2023-06-22 20:37:03 → ⇥
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Editor: DominicRicottone
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'''NetworkManager''' is a high level network administration tool. '''`NetworkManager(8)`''' is a high level network administration tool.
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Most [[Linux]] distributions offer a `networkmanager` package.
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'''`nmcli(1)`''' and '''`nmtui(1)`''' are bundled with NetworkManager. '''`nmcli(1)`''' and '''`nmtui(1)`''' are bundled with `NetworkManager(8)`.
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NetworkManager stores profiles of '''connections'''. These are then written to files in `/etc/NetworkManager/system-connections/`. `NetworkManager(8)` stores profiles of '''connections'''. These are then written to files in `/etc/NetworkManager/system-connections/`.
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NetworkManager uses an internal [[Protocols/DHCP|DHCP]] client. To use a different client, edit `/etc/NetworkManager/conf.d/dhcp-client.conf` like: `NetworkManager(8)` uses an internal [[Protocols/DHCP|DHCP]] client. To use a different client, edit `/etc/NetworkManager/conf.d/dhcp-client.conf` like:
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Only [[Dhclient|dhclient]] and [[Dhcpcd|dhcpcd]] are allowed alternatives. Only [[Dhclient|dhclient(8)]] and [[Dhcpcd|dhcpcd(8)]] are allowed alternatives.
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NetworkManager broadcasts a machine's hostname. To disable this on a per-connection basis, edit `/etc/NetworkManager/system-connections/CONNECTION_UUID` like: `NetworkManager(8)` broadcasts a machine's hostname. To disable this on a per-connection basis, edit `/etc/NetworkManager/system-connections/CONNECTION_UUID` like:
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NetworkManager tries to take ownership of [[Protocols/DNS|DNS]] through the [[Linux/resolv.conf|resolver file]], `/etc/resolv.conf`. If another service tries to do the same, DNS can end up mangled. `NetworkManager(8)` tries to take ownership of [[Protocols/DNS|DNS]] through the [[Linux/ResolvConf|resolver file]], `/etc/resolv.conf`. If another service tries to do the same, DNS can end up mangled.
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Only [[Dnsmasq|dnsmasq]] and [[Linux/SystemdResolved|systemd-resolved]] are allowed alternatives. Only [[Dnsmasq|dnsmasq(8)]] and [[Linux/SystemdResolved|systemd-resolved(8)]] are allowed alternatives.

As a workaround for compatibility with [[OpenResolv|openresolv]], edit `/etc/NetworkManager/conf.d/rc-manager.conf` like:

{{{
[main]
rc-manager=resolvconf
}}}

It is also possible to disable DNS operations entirely by setting `dns=none`.
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== Wi-Fi Backend === === Wi-Fi Backend ===
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----



== See also ==

[[https://man.archlinux.org/man/extra/networkmanager/NetworkManager.8.en|NetworkManager(8)]]

[[https://man.archlinux.org/man/nmcli.1|nmcli(1)]]

NetworkManager

NetworkManager(8) is a high level network administration tool.

Contents

  1. NetworkManager
    1. Installation
    2. Usage
      1. WiFi
      2. Network Interfaces
    3. Configurations
      1. DHCP
      2. DNS
      3. Wi-Fi Backend
    4. See also

Installation

Most Linux distributions offer a networkmanager package.

Usage

nmcli(1) and nmtui(1) are bundled with NetworkManager(8).

NetworkManager(8) stores profiles of connections. These are then written to files in /etc/NetworkManager/system-connections/.

To list all connections, try: 

nmcli connection show

To set a connection up or down, try: 

nmcli connection up CONNECTION_UUID
nmcli connection down CONNECTION_UUID

To delete a connection (and erase the locally stored profile), try: 

nmcli connection delete CONNECTION_UUID
# or
rm /etc/NetworkManager/system-connections/CONNECTION_UUID

WiFi

To list available Wi-Fi networks, try: 

nmcli device wifi list

To connect to a new Wi-Fi network, thereby creating a connection, try: 

nmcli device wifi connect NETWORK_SSID password NETWORK_PASSWORD

To turn off Wi-Fi entirely, try: 

nmcli radio wifi off

Network Interfaces

To disconnect a network interface (like eth0), try: 

nmcli device disconnect ifname IFNAME

Configurations

DHCP

NetworkManager(8) uses an internal DHCP client. To use a different client, edit /etc/NetworkManager/conf.d/dhcp-client.conf like: 

[main]
dhcp=dhclient

Only dhclient(8) and dhcpcd(8) are allowed alternatives.

NetworkManager(8) broadcasts a machine's hostname. To disable this on a per-connection basis, edit /etc/NetworkManager/system-connections/CONNECTION_UUID like: 

[ipv4]
dhcp-send-hostname=false

[ipv6]
dhcp-send-hostname=false

DNS

NetworkManager(8) tries to take ownership of DNS through the resolver file, /etc/resolv.conf. If another service tries to do the same, DNS can end up mangled.

To use a different client, edit /etc/NetworkManager/conf.d/dns.conf like: 

[main]
dns=dnsmasq

Only dnsmasq(8) and systemd-resolved(8) are allowed alternatives.

As a workaround for compatibility with openresolv, edit /etc/NetworkManager/conf.d/rc-manager.conf like: 

[main]
rc-manager=resolvconf

It is also possible to disable DNS operations entirely by setting dns=none.

Wi-Fi Backend

To use iwd(8) as the Wi-Fi backend, edit /etc/NetworkManager/conf.d/wifi_backend.conf like: 

[device]
wifi.backend=iwd

See also

NetworkManager(8)

nmcli(1)

CategoryRicottone

NetworkManager (last edited 2023-06-22 20:37:03 by DominicRicottone)