# pacman -Syu :: Synchronizing package databases... error: failed retrieving file 'core.db' from mirrors.ustc.edu.cn : Recv failure: Connection reset by peer error: failed retrieving file 'core.db' from mirrors.163.com : Recv failure: Connection reset by peer error: failed retrieving file 'core.db' from archlinux.polymorf.fr : Recv failure: Connection reset by peer error: failed retrieving file 'core.db' from fooo.biz : Recv failure: Connection reset by peer error: failed retrieving file 'core.db' from mirror.one.com : Recv failure: Connection reset by peer ^C Interrupt signal received But I found that I can ping mirrors.ustc.edu.cn # ping mirrors.ustc.edu.cn PING mirrors.ustc.edu.cn (202.38.95.110) 56(84) bytes of data. 64 bytes from mirrors.ustc.edu.cn (202.38.95.110): icmp_seq=1 ttl=128 time=5.46 ms 64 bytes from mirrors.ustc.edu.cn (202.38.95.110): icmp_seq=2 ttl=128 time=5.68 ms 64 bytes from mirrors.ustc.edu.cn (202.38.95.110): icmp_seq=3 ttl=128 time=5.07 ms ^C --- mirrors.ustc.edu.cn ping statistics --- 3 packets transmitted, 3 received, 0% packet loss, time 2003ms rtt min/avg/max/mdev = 5.076/5.410/5.686/0.252 ms I don't know what's the problem about my x86_64 archlinux. -- My best regards to you. No System Is Safe! mudongliang