nmcli examples RHEL 7

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Example 1. Listing available Wi-Fi APs

$ nmcli device wifi list
           *  SSID               MODE    CHAN  RATE       SIGNAL  BARS  SECURITY
              netdatacomm_local  Infra   6     54 Mbit/s  37      ▂▄__  WEP
           *  F1                 Infra   11    54 Mbit/s  98      ▂▄▆█  WPA1
              LoremCorp          Infra   1     54 Mbit/s  62      ▂▄▆_  WPA2 802.1X
              Internet           Infra   6     54 Mbit/s  29      ▂___  WPA1
              HPB110a.F2672A     Ad-Hoc  6     54 Mbit/s  22      ▂___  --
              Jozinet            Infra   1     54 Mbit/s  19      ▂___  WEP
              VOIP               Infra   1     54 Mbit/s  20      ▂___  WEP
              MARTINA            Infra   4     54 Mbit/s  32      ▂▄__  WPA2
              N24PU1             Infra   7     11 Mbit/s  22      ▂___  --
              alfa               Infra   1     54 Mbit/s  67      ▂▄▆_  WPA2
              bertnet            Infra   5     54 Mbit/s  20      ▂___  WPA1 WPA2

       This command shows how to list available Wi-Fi networks (APs). You can also use
       --fields option for displaying different columns.  nmcli -f all dev wifi list
       will show all of them.

Example 2. Showing general information and properties for a Wi-Fi interface

$ nmcli -p -f general,wifi-properties device show wlan0
           ====================================
                                   Device details (wlan0)
           ====================================
           GENERAL.DEVICE:           wlan0
           GENERAL.TYPE:             wifi
           GENERAL.VENDOR:           Intel Corporation
           GENERAL.PRODUCT:          PRO/Wireless 5100 AGN [Shiloh] Network Connection
           GENERAL.DRIVER:           iwlwifi
           GENERAL.DRIVER-VERSION:   3.8.13-100.fc17.x86_64
           GENERAL.FIRMWARE-VERSION: 8.83.5.1 build 33692
           GENERAL.HWADDR:           00:1E:65:37:A1:D3
           GENERAL.MTU:              1500
           GENERAL.STATE:            100 (connected)
           GENERAL.REASON:           0 (No reason given)
           GENERAL.UDI:              /sys/devices/pci0000:00/0000:00:1c.1/net/wlan0
           GENERAL.IP-IFACE:         wlan0
           GENERAL.IS-SOFTWARE:      no
           GENERAL.NM-MANAGED:       yes
           GENERAL.AUTOCONNECT:      yes
           GENERAL.FIRMWARE-MISSING: no
           GENERAL.CONNECTION:       My Alfa WiFi
           GENERAL.CON-UUID:         85194f4c-d496-4eec-bae0-d880b4cbcf26
           GENERAL.CON-PATH:         /org/freedesktop/NetworkManager/ActiveConnection/
           10
           ---------------------------------------------------------------------------
           WIFI-PROPERTIES.WEP:      yes
           WIFI-PROPERTIES.WPA:      yes
           WIFI-PROPERTIES.WPA2:     yes
           WIFI-PROPERTIES.TKIP:     yes
           WIFI-PROPERTIES.CCMP:     yes
           WIFI-PROPERTIES.AP:       no
           WIFI-PROPERTIES.ADHOC:    yes
           ---------------------------------------------------------------------------

       This command shows information about a Wi-Fi device.

Example 3. Listing NetworkManager polkit permissions

$ nmcli general permissions
           PERMISSION                                                VALUE
           org.freedesktop.NetworkManager.enable-disable-network     yes
           org.freedesktop.NetworkManager.enable-disable-wifi        yes
           org.freedesktop.NetworkManager.enable-disable-wwan        yes
           org.freedesktop.NetworkManager.enable-disable-wimax       yes
           org.freedesktop.NetworkManager.sleep-wake                 no
           org.freedesktop.NetworkManager.network-control            yes
           org.freedesktop.NetworkManager.wifi.share.protected       yes
           org.freedesktop.NetworkManager.wifi.share.open            yes
           org.freedesktop.NetworkManager.settings.modify.system     yes
           org.freedesktop.NetworkManager.settings.modify.own        yes
           org.freedesktop.NetworkManager.settings.modify.hostname   auth
           org.freedesktop.NetworkManager.settings.modify.global-dns auth
           org.freedesktop.NetworkManager.reload                     auth

       This command shows configured polkit permissions for various NetworkManager
       operations. These permissions or actions (using polkit language) are configured
       by a system administrator and are not meant to be changed by users. The usual
       place for the polkit configuration is
       /usr/share/polkit-1/actions/org.freedesktop.NetworkManager.policy.  pkaction
       command can display description for polkit actions.

             pkaction --action-id org.freedesktop.NetworkManager.network-control --verbose


       More information about polkit can be found at
       http://www.freedesktop.org/wiki/Software/polkit.

Example 4. Listing NetworkManager log level and domains

$ nmcli general logging
           LEVEL  DOMAINS
           INFO PLATFORM,RFKILL,ETHER,WIFI,BT,MB,DHCP4,DHCP6,PPP,WIFI_SCAN,IP4,IP6,A
           UTOIP4,DNS,VPN,SHARING,SUPPLICANT,AGENTS,SETTINGS,SUSPEND,CORE,DEVICE,OLPC,
           WIMAX,INFINIBAND,FIREWALL,ADSL,BOND,VLAN,BRIDGE,DBUS_PROPS,TEAM,CONCHECK,DC
           B,DISPATCH

       This command shows current NetworkManager logging status.

Example 5. Changing NetworkManager logging
 
$ nmcli g log level DEBUG domains CORE,ETHER,IP
 
$ nmcli g log level INFO domains DEFAULT

       The first command makes NetworkManager log in DEBUG level, and only for CORE,
       ETHER and IP domains. The second command restores the default logging state.
       Please refer to the NetworkManager.conf(5) manual page for available logging
       levels and domains.

Example 6. Adding a bonding master and two slave connection profiles

$ nmcli con add type bond ifname mybond0 mode active-backup
 
$ nmcli con add type ethernet ifname eth1 master mybond0
 
$ nmcli con add type ethernet ifname eth2 master mybond0

       This example demonstrates adding a bond master connection and two slaves. The
       first command adds a master bond connection, naming the bonding interface
       mybond0 and using active-backup mode. The next two commands add slaves
       connections, both enslaved to mybond0. The first slave will be bound to eth1
       interface, the second to eth2.

Example 7. Adding a team master and two slave connection profiles

$ nmcli con add type team con-name Team1 ifname Team1 config team1-master-json.conf
 
$ nmcli con add type ethernet con-name Team1-slave1 ifname em1 master Team1
 
$ nmcli con add type ethernet con-name Team1-slave2 ifname em2 master Team1

       This example demonstrates adding a team master connection profile and two
       slaves. It is very similar to the bonding example. The first command adds a
       master team profile, naming the team interface and the profile Team1. The team
       configuration for the master is read from team1-master-json.conf file. Later,
       you can change the configuration with modify command (nmcli con modify Team1
       team.config team1-master-another-json.conf). The last two commands add slaves
       profiles, both enslaved to Team1. The first slave will be bound to em1
       interface, the second to em2. The slaves don't specify config and thus teamd
       will use its default configuration. You will activate the whole setup by
       activating both slaves:

$ nmcli con up Team1-slave1
 
$ nmcli con up Team1-slave2

       By default, the created profiles are marked for auto-activation. But if another
       connection has been activated on the device, the new profile won't activate
       automatically and you need to activate it manually.

Example 8. Adding a bridge and two slave profiles

$ nmcli con add type bridge con-name TowerBridge ifname TowerBridge
 
$ nmcli con add type ethernet con-name br-slave-1 ifname ens3 master TowerBridge
 
$ nmcli con add type ethernet con-name br-slave-2 ifname ens4 master TowerBridge
 
$ nmcli con modify TowerBridge bridge.stp no

       This example demonstrates adding a bridge master connection and two slaves. The
       first command adds a master bridge connection, naming the bridge interface and
       the profile as TowerBridge. The next two commands add slaves profiles, both will
       be enslaved to TowerBridge. The first slave will be tied to ens3 interface, the
       second to ens4. The last command will disable 802.1D STP for the TowerBridge
       profile.

Example 9. Adding an ethernet connection profile with manual IP configuration

$ nmcli con add con-name my-con-em1 ifname em1 type ethernet \ip4 192.168.100.100/24 gw4 192.168.100.1 ip4 1.2.3.4 ip6 abbe::cafe
 
$ nmcli con mod my-con-em1 ipv4.dns "8.8.8.8 8.8.4.4"
 
$ nmcli con mod my-con-em1 +ipv4.dns 1.2.3.4
 
$ nmcli con mod my-con-em1 ipv6.dns "2001:4860:4860::8888 2001:4860:4860::8844"
 
$ nmcli -p con show my-con-em1

       The first command adds an Ethernet connection profile named my-con-em1 that is
       bound to interface name em1. The profile is configured with static IP addresses.
       Three addresses are added, two IPv4 addresses and one IPv6. The first IP
       192.168.100.100 has a prefix of 24 (netmask equivalent of 255.255.255.0).
       Gateway entry will become the default route if this profile is activated on em1
       interface (and there is no connection with higher priority). The next two
       addresses do not specify a prefix, so a default prefix will be used, i.e. 32 for
       IPv4 and 128 for IPv6. The second, third and fourth commands modify DNS
       parameters of the new connection profile. The last con show command displays the
       profile so that all parameters can be reviewed.

Example 10. Convenient field values retrieval for scripting

$ nmcli -g ip4.address connection show my-con-eth0
           192.168.1.12/24

$ nmcli -g ip4.address,ip4.dns connection show my-con-eth0
           192.168.1.12/24
           192.168.1.1

$ nmcli -g ip4 connection show my-con-eth0
           IP4:192.168.1.12/24:192.168.1.1::192.168.1.1::

       This example shows retrieval of ip4 connection field values via the --get-values
       option. Multiple comma separated fields can be provided: they will be printed
       one per line. If a whole section is provided instead of a single field, the name
       of the section will be printed followed by all the related field values on the
       same line. See also --terse, --mode, --fields and --escape options in nmcli(1)
       manual page for more customized output.

Example 11. Escaping colon characters in tabular mode

$ nmcli -t -f general -e yes -m tab dev show eth0
           GENERAL:eth0:ethernet:Intel Corporation:82567LM Gigabit Network Connection:
           e1000e:2.1.4-k:1.8-3:00\:22\:68\:15\:29\:21:1500:100 (connected):0 (No reas
           on given):/sys/devices/pci0000\:00/0000\:00\:19.0/net/eth0:eth0:yes:yes:no:
           ethernet-13:89cbcbc6-dc85-456c-9c8b-bd828fee3917:/org/freedesktop/NetworkMa
           nager/ActiveConnection/9

This example shows escaping colon characters in tabular mode. It may be useful for script processing, because ':' is used as a field separator.

Example 12. nmcli usage in a NetworkManager dispatcher script to make Ethernet and Wi-Fi mutually exclusive
           #!/bin/bash
           export LC_ALL=C

           enable_disable_wifi ()
           {
          result=$(nmcli dev | grep "ethernet" | grep -w "connected")
               if [ -n "$result" ]; then
                   nmcli radio wifi off
               else
                   nmcli radio wifi on
               fi
           }

           if [ "$2" = "up" ]; then
               enable_disable_wifi
           fi

           if [ "$2" = "down" ]; then
               enable_disable_wifi
           fi


       This dispatcher script makes Wi-Fi mutually exclusive with wired networking.
       When a wired interface is connected, Wi-Fi will be set to airplane mode
       (rfkilled). When the wired interface is disconnected, Wi-Fi will be turned back
       on. Name this script e.g. 70-wifi-wired-exclusive.sh and put it into
       /etc/NetworkManager/dispatcher.d/ directory. See NetworkManager(8) manual page
       for more information about NetworkManager dispatcher scripts.

       Example sessions of interactive connection editor

Example 13. Adding an ethernet connection profile in interactive editor (a)
$ nmcli connection edit type ethernet

           ===| 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, dcb
           nmcli> print
           ==========================================
                                     Connection details
           ==========================================
           connection.id:                      ethernet-4
           connection.uuid:                    de89cdeb-a3e1-4d53-8fa0-c22546c775f4
           connection.interface-name:          --
           connection.type:                    802-3-ethernet
           connection.autoconnect:             yes
           connection.autoconnect-priority:    0
           connection.timestamp:               0
           connection.read-only:               no
           connection.permissions:
           connection.zone:                    --
           connection.master:                  --
           connection.slave-type:              --
           connection.secondaries:
           connection.gateway-ping-timeout:    0
           ---------------------------------------------------------------------------
           802-3-ethernet.port:                --
           802-3-ethernet.speed:               0
           802-3-ethernet.duplex:              --
           802-3-ethernet.auto-negotiate:      yes
           802-3-ethernet.mac-address:         --
           802-3-ethernet.cloned-mac-address:  --
           802-3-ethernet.mac-address-blacklist:
           802-3-ethernet.mtu:                 auto
           802-3-ethernet.s390-subchannels:
           802-3-ethernet.s390-nettype:        --
           802-3-ethernet.s390-options:
           ---------------------------------------------------------------------------
           ipv4.method:                        auto
           ipv4.dns:
           ipv4.dns-search:
           ipv4.addresses:
           ipv4.gateway:                       --
           ipv4.routes:
           ipv4.route-metric:                  -1
           ipv4.ignore-auto-routes:            no
           ipv4.ignore-auto-dns:               no
           ipv4.dhcp-client-id:                --
           ipv4.dhcp-send-hostname:            yes
           ipv4.dhcp-hostname:                 --
           ipv4.never-default:                 no
           ipv4.may-fail:                      yes
           ---------------------------------------------------------------------------
           ipv6.method:                        auto
           ipv6.dns:
           ipv6.dns-search:
           ipv6.addresses:
           ipv6.gateway:                       --
           ipv6.routes:
           ipv6.route-metric:                  -1
           ipv6.ignore-auto-routes:            no
           ipv6.ignore-auto-dns:               no
           ipv6.never-default:                 no
           ipv6.may-fail:                      yes
           ipv6.ip6-privacy:                   -1 (unknown)
           ipv6.dhcp-hostname:                 --
           ---------------------------------------------------------------------------
           nmcli> goto ethernet
           You may edit the following properties: port, speed, duplex, auto-negotiate,
            mac-address, cloned-mac-address, mac-address-blacklist, mtu, s390-subchann
           els, s390-nettype, s390-options
           nmcli 802-3-ethernet> set mtu 1492
           nmcli 802-3-ethernet> b
           nmcli> goto ipv4.addresses
           nmcli ipv4.addresses> desc

           === [addresses] ===
           [NM property description]
           Array of IP addresses.

           [nmcli specific description]
           Enter a list of IPv4 addresses formatted as:
             ip[/prefix], ip[/prefix],...
           Missing prefix is regarded as prefix of 32.

Example: 192.168.1.5/24, 10.0.0.11/24

nmcli ipv4.addresses> set 192.168.1.100/24
     Do you also want to set 'ipv4.method' to 'manual'? [yes]: yes
 
nmcli ipv4.addresses>
 
nmcli ipv4.addresses> print addresses: 192.168.1.100/24
 
nmcli ipv4.addresses> back
nmcli ipv4> b
nmcli> set ipv4.gateway 192.168.1.1
nmcli> verify
Verify connection: OK
nmcli> print
           ================================================
                                     Connection details
           ================================================
           connection.id:                      ethernet-4
           connection.uuid:                    de89cdeb-a3e1-4d53-8fa0-c22546c775f4
           connection.interface-name:          --
           connection.type:                    802-3-ethernet
           connection.autoconnect:             yes
           connection.autoconnect-priority:    0
           connection.timestamp:               0
           connection.read-only:               no
           connection.permissions:
           connection.zone:                    --
           connection.master:                  --
           connection.slave-type:              --
           connection.secondaries:
           connection.gateway-ping-timeout:    0
           ---------------------------------------------------------------------------
           802-3-ethernet.port:                --
           802-3-ethernet.speed:               0
           802-3-ethernet.duplex:              --
           802-3-ethernet.auto-negotiate:      yes
           802-3-ethernet.mac-address:         --
           802-3-ethernet.cloned-mac-address:  --
           802-3-ethernet.mac-address-blacklist:
           802-3-ethernet.mtu:                 1492
           802-3-ethernet.s390-subchannels:
           802-3-ethernet.s390-nettype:        --
           802-3-ethernet.s390-options:
           ---------------------------------------------------------------------------
           ipv4.method:                        manual
           ipv4.dns:
           ipv4.dns-search:
           ipv4.addresses:                     192.168.1.100/24
           ipv4.gateway:                       192.168.1.1
           ipv4.routes:
           ipv4.route-metric:                  -1
           ipv4.ignore-auto-routes:            no
           ipv4.ignore-auto-dns:               no
           ipv4.dhcp-client-id:                --
           ipv4.dhcp-send-hostname:            yes
           ipv4.dhcp-hostname:                 --
           ipv4.never-default:                 no
           ipv4.may-fail:                      yes
           ---------------------------------------------------------------------------
           ipv6.method:                        auto
           ipv6.dns:
           ipv6.dns-search:
           ipv6.addresses:
           ipv6.routes:
           ipv6.route-metric:                  -1
           ipv6.ignore-auto-routes:            no
           ipv6.ignore-auto-dns:               no
           ipv6.never-default:                 no
           ipv6.may-fail:                      yes
           ipv6.ip6-privacy:                   -1 (unknown)
           ipv6.dhcp-hostname:                 --
           ---------------------------------------------------------------------------
nmcli> set ipv4.dns 8.8.8.8 8.8.4.4
nmcli> print
           ==================================================
                                     Connection details
           ==================================================
           connection.id:                      ethernet-4
           connection.uuid:                    de89cdeb-a3e1-4d53-8fa0-c22546c775f4
           connection.interface-name:          --
           connection.type:                    802-3-ethernet
           connection.autoconnect:             yes
           connection.autoconnect-priority:    0
           connection.timestamp:               0
           connection.read-only:               no
           connection.permissions:
           connection.zone:                    --
           connection.master:                  --
           connection.slave-type:              --
           connection.secondaries:
           connection.gateway-ping-timeout:    0
           ---------------------------------------------------------------------------
           802-3-ethernet.port:                --
           802-3-ethernet.speed:               0
           802-3-ethernet.duplex:              --
           802-3-ethernet.auto-negotiate:      yes
           802-3-ethernet.mac-address:         --
           802-3-ethernet.cloned-mac-address:  --
           802-3-ethernet.mac-address-blacklist:
           802-3-ethernet.mtu:                 1492
           802-3-ethernet.s390-subchannels:
           802-3-ethernet.s390-nettype:        --
           802-3-ethernet.s390-options:
           ---------------------------------------------------------------------------
           ipv4.method:                        manual
           ipv4.dns:                           8.8.8.8,8.8.4.4
           ipv4.dns-search:
           ipv4.addresses:                     192.168.1.100/24
           ipv4.gateway:                       192.168.1.1
           ipv4.routes:
           ipv4.route-metric:                  -1
           ipv4.ignore-auto-routes:            no
           ipv4.ignore-auto-dns:               no
           ipv4.dhcp-client-id:                --
           ipv4.dhcp-send-hostname:            yes
           ipv4.dhcp-hostname:                 --
           ipv4.never-default:                 no
           ipv4.may-fail:                      yes
           ---------------------------------------------------------------------------
           ipv6.method:                        auto
           ipv6.dns:
           ipv6.dns-search:
           ipv6.addresses:
           ipv6.gateway:                       --
           ipv6.routes:
           ipv6.route-metric:                  -1
           ipv6.ignore-auto-routes:            no
           ipv6.ignore-auto-dns:               no
           ipv6.never-default:                 no
           ipv6.may-fail:                      yes
           ipv6.ip6-privacy:                   -1 (unknown)
           ipv6.dhcp-hostname:                 --
           ---------------------------------------------------------------------------
nmcli> verify
Verify connection: OK
nmcli> save
Connection 'ethernet-4' (de89cdeb-a3e1-4d53-8fa0-c22546c775f4) successfully saved.
nmcli> quit