> well, > I found that URL using Google before I posted the message here. I'm starting squid as root, which should have the rights to issue the command, and the thing I find most surprising: why does the error appear starting Version 2.5STABLE11, when 10 worked, and the config stays the same? > > fook:/usr/local/squid/sbin # ./squid -v > Squid Cache: Version 2.5.STABLE12 > configure options: --enable-auth=ntlm,basic --enable-external-acl-helpers=wbinfo_group > > I tried compiling squid w/out ntml support: same error. > > But since you've pointed me to the PID file I found out the following: > If I use "pid_filename /usr/local/squid/var/logs/squid.pid" I get the mentioned error message: > fook:/usr/local/squid/sbin # ./squid -k reconfigure > squid: ERROR: Could not send signal 1 to process 21377: (1) Operation not permitted > > If I use "pid_filename /var/run/squid/squid.pid" (permissions are ok) I get: > fook:/usr/local/squid/sbin # ./squid -k reconfigure > squid: ERROR: No running copy That´s a chicken and egg problem. I think you can only do this, following a cold start. > > However, squid created the PID file at the configured location: > fook:/usr/local/squid/sbin # ll /var/run/squid/ > total 5 > drwxrwxr-x 2 root nogroup 80 Jan 9 16:37 . > drwxr-xr-x 14 root root 752 Jan 9 15:56 .. > -rw-r--r-- 1 root nogroup 6 Jan 9 16:37 squid.pid > > I'm lost... > M.