linux下网络时有时无

ppbbgg110

me@dubuntu:~$ ping www.baidu.com
ping: unknown host www.baidu.com
me@dubuntu:~$ ping www.baidu.com
PING www.a.shifen.com (220.181.38.5) 56(84) bytes of data.
64 bytes from 220.181.38.5: icmp_seq=1 ttl=54 time=38.0 ms
64 bytes from 220.181.38.5: icmp_seq=5 ttl=54 time=38.2 ms
64 bytes from 220.181.38.5: icmp_seq=6 ttl=54 time=37.8 ms
64 bytes from 220.181.38.5: icmp_seq=7 ttl=54 time=38.4 ms
64 bytes from 220.181.38.5: icmp_seq=8 ttl=54 time=39.1 ms
64 bytes from 220.181.38.5: icmp_seq=9 ttl=54 time=37.7 ms
64 bytes from 220.181.38.5: icmp_seq=10 ttl=54 time=38.0 ms
64 bytes from 220.181.38.5: icmp_seq=11 ttl=54 time=37.3 ms
64 bytes from 220.181.38.5: icmp_seq=12 ttl=54 time=38.1 ms
64 bytes from 220.181.38.5: icmp_seq=13 ttl=54 time=38.9 ms
64 bytes from 220.181.38.5: icmp_seq=14 ttl=54 time=37.5 ms
64 bytes from 220.181.38.5: icmp_seq=15 ttl=54 time=37.6 ms
64 bytes from 220.181.38.5: icmp_seq=16 ttl=54 time=38.6 ms
64 bytes from 220.181.38.5: icmp_seq=17 ttl=54 time=37.9 ms
64 bytes from 220.181.38.5: icmp_seq=18 ttl=54 time=40.7 ms
64 bytes from 220.181.38.5: icmp_seq=19 ttl=54 time=38.2 ms
64 bytes from 220.181.38.5: icmp_seq=20 ttl=54 time=38.5 ms
64 bytes from 220.181.38.5: icmp_seq=21 ttl=54 time=37.3 ms
64 bytes from 220.181.38.5: icmp_seq=22 ttl=54 time=38.1 ms
64 bytes from 220.181.38.5: icmp_seq=23 ttl=54 time=38.9 ms
64 bytes from 220.181.38.5: icmp_seq=24 ttl=54 time=37.7 ms
64 bytes from 220.181.38.5: icmp_seq=25 ttl=54 time=38.3 ms
64 bytes from 220.181.38.5: icmp_seq=26 ttl=54 time=37.7 ms
64 bytes from 220.181.38.5: icmp_seq=27 ttl=54 time=37.9 ms
64 bytes from 220.181.38.5: icmp_seq=28 ttl=54 time=38.9 ms
64 bytes from 220.181.38.5: icmp_seq=29 ttl=54 time=38.0 ms
64 bytes from 220.181.38.5: icmp_seq=30 ttl=54 time=38.8 ms
64 bytes from 220.181.38.5: icmp_seq=31 ttl=54 time=37.3 ms
64 bytes from 220.181.38.5: icmp_seq=32 ttl=54 time=37.9 ms
64 bytes from 220.181.38.5: icmp_seq=33 ttl=54 time=37.0 ms
64 bytes from 220.181.38.5: icmp_seq=34 ttl=54 time=38.0 ms
64 bytes from 220.181.38.5: icmp_seq=35 ttl=54 time=38.6 ms
64 bytes from 220.181.38.5: icmp_seq=36 ttl=54 time=37.1 ms
64 bytes from 220.181.38.5: icmp_seq=37 ttl=54 time=38.4 ms
64 bytes from 220.181.38.5: icmp_seq=38 ttl=54 time=38.2 ms
64 bytes from 220.181.38.5: icmp_seq=39 ttl=54 time=37.8 ms
64 bytes from 220.181.38.5: icmp_seq=40 ttl=54 time=37.6 ms
64 bytes from 220.181.38.5: icmp_seq=41 ttl=54 time=38.0 ms
64 bytes from 220.181.38.5: icmp_seq=42 ttl=54 time=38.8 ms
64 bytes from 220.181.38.5: icmp_seq=43 ttl=54 time=37.6 ms
64 bytes from 220.181.38.5: icmp_seq=44 ttl=54 time=38.4 ms
64 bytes from 220.181.38.5: icmp_seq=45 ttl=54 time=37.0 ms
64 bytes from 220.181.38.5: icmp_seq=46 ttl=54 time=37.7 ms
64 bytes from 220.181.38.5: icmp_seq=47 ttl=54 time=38.6 ms
64 bytes from 220.181.38.5: icmp_seq=48 ttl=54 time=37.9 ms
64 bytes from 220.181.38.5: icmp_seq=49 ttl=54 time=37.7 ms
64 bytes from 220.181.38.5: icmp_seq=50 ttl=54 time=38.5 ms
64 bytes from 220.181.38.5: icmp_seq=51 ttl=54 time=37.5 ms
ping: sendmsg: No buffer space available
ping: sendmsg: No buffer space available
ping: sendmsg: No buffer space available
ping: sendmsg: No buffer space available
ping: sendmsg: No buffer space available
ping: sendmsg: No buffer space available
ping: sendmsg: No buffer space available
ping: sendmsg: No buffer space available
ping: sendmsg: No buffer space available
ping: sendmsg: No buffer space available
ping: sendmsg: No buffer space available
ping: sendmsg: No buffer space available
ping: sendmsg: No buffer space available
ping: sendmsg: No buffer space available
ping: sendmsg: No buffer space available
ping: sendmsg: No buffer space available
ping: sendmsg: No buffer space available
ping: sendmsg: No buffer space available
ping: sendmsg: No buffer space available
ping: sendmsg: No buffer space available
ping: sendmsg: No buffer space available
ping: sendmsg: No buffer space available
64 bytes from 220.181.38.5: icmp_seq=74 ttl=54 time=38.5 ms
64 bytes from 220.181.38.5: icmp_seq=75 ttl=54 time=38.3 ms
64 bytes from 220.181.38.5: icmp_seq=76 ttl=54 time=37.9 ms
64 bytes from 220.181.38.5: icmp_seq=77 ttl=54 time=37.1 ms
64 bytes from 220.181.38.5: icmp_seq=78 ttl=54 time=38.4 ms
64 bytes from 220.181.38.5: icmp_seq=79 ttl=54 time=38.4 ms
64 bytes from 220.181.38.5: icmp_seq=80 ttl=54 time=38.5 ms
64 bytes from 220.181.38.5: icmp_seq=81 ttl=54 time=38.3 ms
64 bytes from 220.181.38.5: icmp_seq=82 ttl=54 time=38.4 ms
64 bytes from 220.181.38.5: icmp_seq=83 ttl=54 time=37.8 ms
64 bytes from 220.181.38.5: icmp_seq=84 ttl=54 time=37.4 ms
64 bytes from 220.181.38.5: icmp_seq=85 ttl=54 time=38.2 ms
64 bytes from 220.181.38.5: icmp_seq=86 ttl=54 time=38.5 ms
64 bytes from 220.181.38.5: icmp_seq=87 ttl=54 time=38.2 ms
64 bytes from 220.181.38.5: icmp_seq=88 ttl=54 time=38.1 ms
64 bytes from 220.181.38.5: icmp_seq=89 ttl=54 time=38.0 ms
64 bytes from 220.181.38.5: icmp_seq=90 ttl=54 time=38.6 ms
64 bytes from 220.181.38.5: icmp_seq=91 ttl=54 time=38.7 ms
64 bytes from 220.181.38.5: icmp_seq=92 ttl=54 time=38.2 ms
64 bytes from 220.181.38.5: icmp_seq=93 ttl=54 time=37.7 ms
64 bytes from 220.181.38.5: icmp_seq=94 ttl=54 time=43.4 ms
64 bytes from 220.181.38.5: icmp_seq=95 ttl=54 time=37.9 ms
64 bytes from 220.181.38.5: icmp_seq=96 ttl=54 time=39.2 ms
64 bytes from 220.181.38.5: icmp_seq=97 ttl=54 time=38.8 ms
64 bytes from 220.181.38.5: icmp_seq=98 ttl=54 time=38.3 ms
64 bytes from 220.181.38.5: icmp_seq=99 ttl=54 time=37.8 ms
64 bytes from 220.181.38.5: icmp_seq=100 ttl=54 time=38.1 ms
64 bytes from 220.181.38.5: icmp_seq=101 ttl=54 time=38.4 ms
64 bytes from 220.181.38.5: icmp_seq=102 ttl=54 time=38.5 ms
ping: sendmsg: No buffer space available
ping: sendmsg: No buffer space available
ping: sendmsg: No buffer space available
ping: sendmsg: No buffer space available
ping: sendmsg: No buffer space available
ping: sendmsg: No buffer space available
ping: sendmsg: Network is unreachable
ping: sendmsg: Network is unreachable
ping: sendmsg: Network is unreachable
ping: sendmsg: Network is unreachable
ping: sendmsg: Network is unreachable
ping: sendmsg: Network is unreachable
ping: sendmsg: Network is unreachable
ping: sendmsg: Network is unreachable
ping: sendmsg: Network is unreachable
ping: sendmsg: Network is unreachable
ping: sendmsg: Network is unreachable
ping: sendmsg: Network is unreachable
ping: sendmsg: Network is unreachable
ping: sendmsg: Network is unreachable
ping: sendmsg: Network is unreachable
ping: sendmsg: Network is unreachable
ping: sendmsg: Network is unreachable
ping: sendmsg: Network is unreachable
ping: sendmsg: Network is unreachable
64 bytes from 220.181.38.5: icmp_seq=128 ttl=54 time=38.2 ms
64 bytes from 220.181.38.5: icmp_seq=129 ttl=54 time=38.0 ms
64 bytes from 220.181.38.5: icmp_seq=130 ttl=54 time=37.8 ms
64 bytes from 220.181.38.5: icmp_seq=131 ttl=54 time=39.1 ms
64 bytes from 220.181.38.5: icmp_seq=132 ttl=54 time=38.4 ms
64 bytes from 220.181.38.5: icmp_seq=133 ttl=54 time=39.1 ms


以前用magiclinux就是因为上网像这样时断时续。重装也没用。所以就没用magiclinux。前几天用着一点事也没有。今天重装了一遍。。。就配置了一下网络。优化系统服务，硬盘。终端。然后apt-get update ..........
哎。很是头痛。不知道怎么搞。就边发贴子也发不了。现在用的XP.