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Linux下sshd启动失败及Squid启动失败问题解决一例
(SSH启动失败) 休假回来，登录服务器时，提示“network refuse"，怎么会？ 检查/etc/hosts.allow , /etc/hosts.deny 都没有问题 本机和服务器IP在同一网段! #service sshd restart 正常 #ps -aux|grep sshd 没有此进程 #nmap -sT localhost 如下，没有sshd进程，看来真的没有启动起来! Starting nmap V. 3.00 ( www.insecure.org/nmap/ ) Interesting ports on localhost.localdomain (127.0.0.1): (The 1593 ports scanned but not shown below are in state: closed) Port State Service 21/tcp open ftp 80/tcp open http 111/tcp open sunrpc 443/tcp open https 1024/tcp open kdm 1025/tcp open NFS-or-IIS 10000/tcp open snet-sensor-mgmt #tail -20 /var/log/secure 发现有如下错误 sshd[3266]: error: Bind to port 22 on 172.16.X.X failed: Cannot assign requested address. sshd[3266]: fatal: Cannot bind any address. sshd[2234]: error: Bind to port 22 on 172.16.X.X failed: Cannot assign requested address. sshd[2234]: fatal: Cannot bind any address. 没有办法，google一下，发现没有合适的解决办法，大多建议重新安装程式，没有办法，开装 #rpm -e openssh* #mount -t iso9660 /dev/cdrom /mnt/cdrom #cd /mnt/cdrom #rpm -ivh openssh* #service sshd start 试用SSH登录，正常 (Squid启动失败) 上班有一会了，有人反映没有办法上网？晕死，怎么一上班这么多事。 进入机房查看服务器，屏幕上面写着呢？ Running: squid -sY >;>; /usr/local/squid/var/squid.out 2>&1 /usr/local/squid/bin/RunCache[22]: 20830 Abort(coredump) Running: squid -sY >;>; /usr/local/squid/var/squid.out 2>&1 #ll /usr/local/squid/var/squid.out 正常 #adsl-restart 以前出现这种问题，好象从启一下ADSL拨号就好了，不过此次不行。 接下来查看其他日志 #tail /usr/local/squid/var/squid.out 2007/07/22 00:56:10| WARNING: Closing open FD 2 2007/07/22 00:56:10| Starting Squid Cache version 2.5.STABLE9 for i686-pc-linux-gnu... 2007/07/22 00:56:10| Process ID 3365 2007/07/22 00:56:10| With 1024 file descriptors available 2007/07/22 00:56:10| Performing DNS Tests... FATAL: ipcache_init: DNS name lookup tests failed. Squid Cache (Version 2.5.STABLE9): Terminated abnormally. CPU Usage: 0.010 seconds = 0.000 user + 0.010 sys Maximum Resident Size: 0 KB Page faults with physical i/o: 276 Startup: Sun Jul 22 00:59:01 CST 2007 WARNING: Cannot write log file: /usr/local/squid/var/logs/cache.log /usr/local/squid/var/logs/cache.log: Permission denied messages will be sent to ’stderr’. #tail /var/log/messages Oct 29 01:39:37 adslserver squid[12521]: Starting Squid Cache version 2.5.STABLE9 for i686-pc-linux-gnu... Oct 29 01:39:37 adslserver squid[12521]: Process ID 12521 Oct 29 01:39:37 adslserver squid[12521]: With 1024 file descriptors available Oct 29 01:39:37 adslserver squid[12521]: Performing DNS Tests... Oct 29 01:39:42 adslserver squid[12521]: Successful DNS name lookup tests... Oct 29 01:39:42 adslserver squid[12521]: DNS Socket created at 0.0.0.0, port 3455, FD 5 Oct 29 01:39:42 adslserver squid[12521]: Adding nameserver 202.96.134.133 from squid.conf Oct 29 01:39:42 adslserver squid[12521]: Adding nameserver 202.96.128.68 from squid.conf Oct 29 01:39:43 adslserver squid[12521]: Unlinkd pipe opened on FD 10 Oct 29 01:39:43 adslserver squid[12521]: Swap maxSize 8192000 KB, estimated 630153 objects Oct 29 01:39:43 adslserver squid[12521]: Target number of buckets: 31507 Oct 29 01:39:43 adslserver squid[12521]: Using 32768 Store buckets Oct 29 01:39:43 adslserver squid[12521]: Max Mem size: 32768 KB Oct 29 01:39:43 adslserver squid[12521]: Max Swap size: 8192000 KB Oct 29 01:39:43 adslserver squid[12521]: Local cache digest enabled; rebuild/rewrite every 3600/3600 sec Oct 29 01:39:43 adslserver squid[12521]: Rebuilding storage in /usr/local/squid/var/cache1 (DIRTY) Oct 29 01:39:43 adslserver squid[12521]: Rebuilding storage in /usr/local/squid/var/cache2 (DIRTY) Oct 29 01:39:43 adslserver squid[12521]: Using Least Load store dir selection Oct 29 01:39:43 adslserver squid[12521]: Current Directory is / Oct 29 01:39:43 adslserver squid[12521]: Loaded Icons. Oct 29 01:39:43 adslserver squid[12521]: Accepting HTTP connections at 172.16.X.X, port 3128, FD 14. Oct 29 01:39:43 adslserver squid[12521]: Accepting ICP messages at 0.0.0.0, port 3130, FD 15. Oct 29 01:39:43 adslserver squid[12521]: Accepting SNMP messages on port 3401, FD 16. Oct 29 01:39:43 adslserver squid[12521]: WCCP Disabled. Oct 29 01:39:43 adslserver squid[12521]: Pinger socket opened on FD 18 Oct 29 01:39:43 adslserver squid[12521]: Ready to serve requests. Oct 29 01:39:43 adslserver squid[12521]: diskHandleWrite: FD 9: disk write error: (28) No space left on device Oct 29 01:39:43 adslserver squid[12521]: Write failure -- check your disk space and cache.log #df -m DISK 100%被使用了，阿门，问题出在这里了，不过奇怪的是我有设置cache_swap_log and cache_swap_high呀，cache应该会自动清的呀，不管了，先手动清了再了 #rm -rf /usr/local/squid/var/cache1 #rm -rf /usr/local/squid/var/cache2 #mkdir /usr/local/squid/var/cache1 #mkdir /usr/local/squid/var/cache2 #chown -R nobody.nobody /usr/local/squid/var #su nobody -c "/usr/local/squid/sbin/squid -z" #su nobody -c "/usr/local/squid/bin/RunCache &" |
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