Linux下sshd啟動(dòng)失敗及Squid啟動(dòng)失敗問(wèn)題解決一例
(SSH啟動(dòng)失敗)
休假回來(lái)，登錄服務(wù)器時(shí)，提示“network refuse"，怎么會(huì )？
檢查/etc/hosts.allow , /etc/hosts.deny 都沒(méi)有問(wèn)題
本機和服務(wù)器IP在同一網(wǎng)段!
#service sshd restart 正常
#ps -aux|grep sshd 沒(méi)有此進(jìn)程
#nmap -sT localhost
如下，沒(méi)有sshd進(jìn)程，看來(lái)真的沒(méi)有啟動(dòng)起來(lái)!
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
發(fā)現有如下錯誤
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.
沒(méi)有辦法，google一下，發(fā)現沒(méi)有合適的解決辦法，大多建議重新安裝程式，沒(méi)有辦法，開(kāi)裝
#rpm -e openssh*
#mount -t iso9660 /dev/cdrom /mnt/cdrom
#cd /mnt/cdrom
#rpm -ivh openssh*
#service sshd start
試用SSH登錄，正常
(Squid啟動(dòng)失敗)
上班有一會(huì )了，有人反映沒(méi)有辦法上網(wǎng)？暈死，怎么一上班這么多事。
進(jìn)入機房查看服務(wù)器，屏幕上面寫(xiě)著(zhù)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 以前出現這種問(wèn)題，好象從啟一下ADSL撥號就好了，不過(guò)此次不行。
接下來(lái)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，阿門(mén)，問(wèn)題出在這里了，不過(guò)奇怪的是我有設置cache_swap_log and cache_swap_high呀，cache應該會(huì )自動(dòng)清的呀，不管了，先手動(dòng)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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