Separate names with a comma.
yes - mine are commented out
deb http://ftp.us.debian.org/debian stretch main contrib
# security updates
I used this as a guide to setup my Untangle on Proxmox..
I have 2 Hp servers ( HP ProLiant DL360 G6, HP Proliant DL160 G6)
that are having a kernel panic with the latest enterprise kernel 4.15.18-1
that would be my guess :/
seems I ran across a recommended change here on the forum...
options vers=4, soft (instead of the vers=3)
I run a cron job weekly
/sbin/fstrim -v /
If that is any help...
Worked for mine also... I selected /boot