renice command

[mattjohndrow]

which one gives more priority- -20 or +20 for renice?

also, i get this line of text whenever i do renice:
sudo [Matthew-Johndrows-Computer:~] matt% sudo renice -20 PID #
sudo: /var/run/sudo writable by non-owner (040777), should be mode 0700

Password:postdrop: warning: unable to look up public/pickup: No such file or directory

PID#: old priority 0, new priority -20

what is it?

[Brad]

Looks like you need to repair your permissions.

-20 is highest priority.
0 is default.
20 is lowest priority.

[mattjohndrow]

thanks brad, appreciate it!