What happened to /etc/network/ipconfig ?

[Renaud Olgiati]

Having to completely rebuild my home network, and looking for the IP address of the gateway, I tried to access /etc/network/ipconfig where I was used to fine the needed details

Surprise, no /etc/network/ipconfig ! WTF ?

Where has that information gone ?

any info gratefuly received,

Renaud Olgiati, on the banks of the Paraguay River

 

[dos2unix]

you are about 12-15 years behind the times



NetworkManager, nmcli replaced networkd a LONG time ago.

These are a little dated, but they should get you by.

Thread 'Using nmcli (NetworkManager Command Line) to create and modify ethernet connnections.'

Dec 29, 2024

nmcli Commands​

Show Connections​

To list all network connections using the abbreviated form:

 nmcli con show

Show Devices​

To list all network devices using the abbreviated form:

 nmcli dev status

Show Configuration for a Specific Device​

To show the configuration of a specific device (e.g., eth0) using the abbreviated form:

 nmcli dev show eth0

Add a DHCP Connection​

To add a DHCP connection with the autoconnect option enabled using the abbreviated form:

 nmcli con add type ethernet ifname eth0 con-name my-dhcp-connection...

• dos2unix
• Replies: 0
• Forum: Linux Networking

• 

Thread 'Become a NetworkManager Guru'

Feb 7, 2024

In most current Linux distro's. Network connections are managed by something called NetworkManager.
If you have a GUI desktop installed, your Network Connections will look something like this.

You can add, delete and modify Network Connections here. Normally your system is smart enough to automatically figure out
which interfaces have connectivity to the internet, and will try to automatically configure them.
But there are times, when you might want to change something.

You can right click on the little icon that looks like two computers and it should bring up something...

• dos2unix
• Replies: 17
• Forum: Linux Networking

• 

 

[Renaud Olgiati]

NetworkManager, nmcli replaced networkd a LONG time ago.

Thank you, I started networking in my house over twenty years ago !

Anyway, thank you for all the info.

Cheers,

Ron.

 

[osprey]

Having to completely rebuild my home network, and looking for the IP address of the gateway, I tried to access /etc/network/ipconfig where I was used to fine the needed details

Surprise, no /etc/network/ipconfig ! WTF ?

Where has that information gone ?

any info gratefuly received,

Renaud Olgiati, on the banks of the Paraguay River

In the case of a system not using NetworkManager, and so not including the nmcli command, generic commands usable to see the ip address and gateway are the commands ip and netstat, for example:

[~]$ ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host noprefixroute
       valid_lft forever preferred_lft forever
2: enp3s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 9c:6b:00:29:37:48 brd ff:ff:ff:ff:ff:ff
    altname enx9c6b00293748
    inet 192.168.0.207/24 brd 192.168.0.255 scope global enp3s0
       valid_lft forever preferred_lft forever
    inet 192.168.0.6/24 brd 192.168.0.255 scope global secondary dynamic enp3s0
       valid_lft 83932sec preferred_lft 83932sec
    inet6 2001:8003:ccaa:6100:9e6b:ff:fe29:3748/64 scope global dynamic mngtmpaddr proto kernel_ra
       valid_lft 81763sec preferred_lft 81763sec
    inet6 fe80::9e6b:ff:fe29:3748/64 scope link proto kernel_ll
       valid_lft forever preferred_lft forever
3: wlp0s20f3: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether f0:57:a6:a9:f4:cf brd ff:ff:ff:ff:ff:ff
    altname wlxf057a6a9f4cf


[~]$ ip r
default via 192.168.0.1 dev enp3s0
192.168.0.0/24 dev enp3s0 proto kernel scope link src 192.168.0.207
192.168.0.1 dev enp3s0 scope link


[~]$ netstat -rn
Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
0.0.0.0         192.168.0.1     0.0.0.0         UG        0 0          0 enp3s0
192.168.0.0     0.0.0.0         255.255.255.0   U         0 0          0 enp3s0
192.168.0.1     0.0.0.0         255.255.255.255 UH        0 0          0 enp3s0

The manpages have info for lots more possible outputs.