![]() Thus, the following commands are equal: # nmcli connection show Hint: You can use the auto-complete hitting Tab when you use nmcli, but is better to use minimal format of the command. Hint: If you want to see only the active connections, type: # nmcli con show -a In the above image you can see the two connections which are active: Myoffice1 and enp0s8. The last column of devices helps us understand which connection is “UP” and running and which is not. Now, let’s move on and check our connections: # nmcli con show ONBOOT, if it has value “yes” it means, that on boot our computer will read this profile and try to assign it to its device.DNS1, DNS2, two dns servers we want to use.For example values of 16, 24, 26 means that the first 16, 24 or 26 bits respectively are 1 and the rest 0, defining exactly what the network address is and what is the range of ip which can be assigned. You can understand better the subnet mask if you write down its binary format. IPADDR, is the static IP we assign to our profile.BOOTPROTO, if it has value “dhcp” then our connection profile takes dynamic IP from dhcp server, if it has value “none” then it takes no dynamic IP and probably whe assign a static IP.DEVICE, the name of the network device which is associated with this profile.We could have wifi, team, bond and others. ![]() Let’s have a quick look to most important of them. We realize that some properties have different values and some others don’t exist if it isn’t necessary. Ι ‘ll show you two of them from my machine, one with a dhcp configuration and one with static ip. When we create a new connection or modify an existing one with nmcli or nmtui, the results are saved here as connection profiles. Ifdown-ipv6 ifdown-tunnel ifup-isdn ifup-TeamPortĪs you can see here the files with name starting with ifcfg- (interface configuration) are connection profiles. Ifdown-ippp ifdown-TeamPort ifup-ipv6 ifup-Team Ifdown-eth ifdown-sit ifup-ib ifup-routes network-functions-ipv6 Ifdown-bnep ifdown-routes ifup-eth ifup-ppp network-functions Ifdown ifdown-ppp ifup-bnep ifup-post init.ipv6-global Ifcfg-lo ifdown-post ifup-aliases ifup-plusb ifup-wireless Sample Output ifcfg-enp0s3 ifdown-isdn ifup ifup-plip ifup-tunnel We find them in /etc/sysconfig/network-scripts directory. We call these files also as “connection profiles”. ![]() They need us to make a configuration file to tell them how to achieve network connectivity. ![]() It is simple to understand that our devices by themselves can do nothing. In the last column we see our configuration files which is used by our devices in order to connect to the network. Naming depends on the type of the network card (if it is onboard, pci card, etc). In your machine you could see other names. We have one network cards with name enp0s3. A good starting point would be to check our devices: # nmcli dev statusĪs we can see in the first column is a list of our network devices. ![]()
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