All, I got some problem to use Squid 2.5S10 + all official patches. Sometimes Squid is loaded at machine boot but could not serve users request (checked by netstat). If I did not use patches, Squid could be shutted down and reloaded. But the patches cause Squid cannot be shutted down with messages below. The Squid is configured to use aufs. Thx & Rgds, Awie ===SNIP=== [root@Squid root]# squid 2005/08/05 21:38:17| Squid is already running! Process ID 626 [root@Squid root]# netstat -a Active Internet connections (servers and established) Proto Recv-Q Send-Q Local Address Foreign Address State tcp 0 0 *:smux *:* LISTEN tcp 0 0 Squid:http *:* LISTEN tcp 0 0 Squid:domain *:* LISTEN tcp 0 0 *:ssh *:* LISTEN tcp 0 0 *:smtp *:* LISTEN tcp 0 528 Squid:ssh 192.168.1.3:1159 ESTABLISHED udp 0 0 *:32768 *:* udp 0 0 Squid:domain *:* raw 0 0 *:tcp *:* 7 raw 0 0 *:udp *:* 7 Active UNIX domain sockets (servers and established) Proto RefCnt Flags Type State I-Node Path unix 5 [ ] DGRAM 948 /dev/log unix 2 [ ] DGRAM 1148 unix 2 [ ] DGRAM 1128 unix 2 [ ] DGRAM 956 [root@Squid root]# squid -k shutdown squid: ERROR: Could not send signal 15 to process 626: (1) Operation not permitted [root@Squid root]#