Network Devices and Connections

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Manual Configuration

Create file in /etc/sysconfig/network-scripts/ifcfg-ifname
Populate file with:
TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=static [dhcp, none]
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
UUID=sd55sd-sdfss5li-lkjawq
NAME=ens256
ONBOOT=yes
IPADDR=192.168.1.11
NETMASK=255.255.255.0
GATEWAY=192.168.1.1
DNS1=192.168.1.53

nmcli

Available Commands

Object: c[onnection]

show lists connections
up / down activates/deactivates an interface
add add a connection
edit edit an existing connection or adds a new one
modify modify one or more properties of an existing connection
delete delete a connection
reload re-read all connections profiles
load re-read a specific connection profile

Object: d[evice]

status exhibits device status
show display detailed information about all or the specified interface

Flow

1. check service running systemctl status NetworkManager

2. check presence of device: nmcli d[evice] s[tatus]

3. add (add) a connection (con) profile and attach it to the interface: nmcli con add type Ethernet ifname ens256 con-name ens256 [ip4 192.168.1.11/24 gw4 192.168.1.1]
Result: Connections ens256 successfully added.

4. confirm status: nmcli c[onnection] s[how]

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