I had file system errors in sda1 (orphaned INODES). After fixing that problem several configuration files are not functioning. Probably the most critical is the DNS lookup function. resolved.conf shows:
[Resolve] #DNS= #FallbackDNS= #Domains= #LLMNR=no #MulticastDNS=no #DNSSEC=no #Cache=yes #DNSStubListener=yes
I can edit the file in mousepad, but cannot save it. I've also tried terminal commands edit, sudo edit, nano and sudo nano. None of these provides a useable copy of resolved.conf. Ubuntu documentation says to fix my problem by editing this file.
How can I edit this file and then save a working version?