Both my rigs have no logs. Neither are set to clear logs on reboot, so they should be there if they are. Only logs I have seen are the ones I posted that show up in miner_watchdog
m1@m1-desktop:~$ /var/log$ ll sys*
bash: /var/log$: No such file or directory
This is truly strange and I kind of want to get the bottom of it. I wonder if you have a read-only filesystem as Ubuntu should be logging tons of stuff to /var/log:
m1@Testy:/var/log$ ls
alternatives.log dist-upgrade lightdm syslog.4.gz
alternatives.log.1 dmesg mail.err syslog.5.gz
apache2 dpkg.log mail.err.1 syslog.6.gz
apport.log dpkg.log.1 mail.log syslog.7.gz
apt faillog mail.log.1 teamviewer12
auth.log fontconfig.log mail.log.2.gz unattended-upgrades
auth.log.1 fsck mail.log.3.gz upstart
auth.log.2.gz gpu-manager.log mail.log.4.gz wtmp
auth.log.3.gz installer prime-offload.log wtmp.1
auth.log.4.gz kern.log prime-supported.log Xorg.0.log
boot.log kern.log.1 speech-dispatcher Xorg.0.log.old
bootstrap.log kern.log.2.gz syslog Xorg.1.log
btmp kern.log.3.gz syslog.1 Xorg.failsafe.log
btmp.1 kern.log.4.gz syslog.2.gz
cups lastlog syslog.3.gz
Try writing a file as root like this:
m1@Testy:/var/log$ sudo su -
root@Testy:~# cd /var/log
root@Testy:/var/log# touch test.txt
root@Testy:/var/log# ls test*
test.txt