FIXED on the backup DHCP server I kept seeing
Apr 10 11:10:08 dhcp-backup kernel: [ 86.045487] audit: type=1400 audit(1586513408.708:44): apparmor="DENIED" operation="open" profile="/usr/sbin/dhcpd" name="/proc/1404/task/1417/comm" pid=1404 comm="dhcpd" requested_mask="w" denied_mask="w" fsuid=0 ouid=0 Apr 10 11:10:08 dhcp-backup kernel: [ 86.047925] audit: type=1400 audit(1586513408.708:45): apparmor="DENIED" operation="open" profile="/usr/sbin/dhcpd" name="/proc/1404/task/1418/comm" pid=1404 comm="dhcpd" requested_mask="w" denied_mask="w" fsuid=0 ouid=0 Apr 10 11:10:08 dhcp-backup kernel: [ 86.048075] audit: type=1400 audit(1586513408.708:46): apparmor="DENIED" operation="open" profile="/usr/sbin/dhcpd" name="/proc/1404/task/1419/comm" pid=1404 comm="dhcpd" requested_mask="w" denied_mask="w" fsuid=0 ouid=0 Changing /etc/apparmor.d/usr.sbin.dhcpd # owner @{PROC}/[0-9]*/task/[0-9]*/comm r, owner @{PROC}/[0-9]*/task/[0-9]*/comm rw, then reloading the policy into the kernel with: sudo apparmor_parser -r /etc/apparmor.d/usr.sbin.dhcpd resolved the issue -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1870729 Title: DHCP Server regularly killed code=killed, status=6/ABRT To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/isc-dhcp/+bug/1870729/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs