I have an old iMac that has Ubuntu server 24.04 LTS (GNU/Linux 6.8.0-35-generic x86_64) installed.
It was previously hooked up to a router that was connected to the internet via Ethernet.Now, it is connected to another identical iMac running macOS through a direct Ethernet cable.
In System Preferences, the ip is set to 192.168.0.33 and the netmask is 255.255.255.0
If I run sudo ifdown enp2s0 && sudo ifup -v enp2s0, the ethernet works and has the ip address 192.168.0.48 as written in /etc/network/interfaces.
ifconfig shows this:
enp2s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 192.168.0.48 netmask 255.255.255.0 broadcast 192.168.0.255 ether 3c:07:54:59:5c:b4 txqueuelen 1000 (Ethernet) RX packets 726 bytes 91026 (91.0 KB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 549 bytes 98547 (98.5 KB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 device interrupt 16 However, if I suspend the system, wake-on-LAN does not work even though it worked perfectly before, and ifconfig shows this:
enp2s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 ether 3c:07:54:59:5c:b4 txqueuelen 1000 (Ethernet) RX packets 633 bytes 70825 (70.8 KB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 477 bytes 86894 (86.8 KB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 device interrupt 16 What should I do to fix this issue?