Last night (7pm), I put the F30Gnome system into suspend. This am, 9am, woke the cpu up, and got a message --no internet.
tried the obvious, (Via Gnome Network). As far as Fedora was concerned, I did not have a wired connection.

Logged out, logged back in, with no success.
Only success was a reboot -- Any ideas how to solve the problem for the future.
I could just not suspend, but that keeps the cpu and fans on for nothing.
By the way, a shorter 4hr suspend returns normally with working network.

Code:
root09:48 AMF30SDA leslie]$ ifconfig enp6s0
enp6s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.15.5  netmask 255.255.255.0  broadcast 192.168.15.255
        inet6 fe80::d7fb:c903:a39a:ca09  prefixlen 64  scopeid 0x20<link>
        ether 0c:9d:92:84:db:d0  txqueuelen 1000  (Ethernet)
        RX packets 31876  bytes 26665897 (25.4 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 28500  bytes 6334678 (6.0 MiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
        device memory 0xf6500000-f651ffff
Using entp6s0 or eth0
What terminal mode commands do I need. Is it only ifup eth0 ? If I try ifup ... I get a deprecated warning to use NetworkManager
man NetworkManager gives me reams of options. Of the list, which is the first one to try?