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【正文】 eb站點(diǎn)啟動(dòng)、關(guān)閉及進(jìn)程查看方法命令所在目錄命令命令說(shuō)明/opt/apache/bin./apachectl start啟動(dòng)d/opt/apache/bin./apachectl startssl啟動(dòng)d并加載SSL服務(wù)/opt/apache/bin./apachectl stop關(guān)閉apache/opt/apache/bin./apachectl status查看apache的狀態(tài) web日志說(shuō)明Log存放目錄為:/opt/apache/logs/opt/apache/logs/access_log為所有訪問(wèn)網(wǎng)站的日志/opt/apache/logs/error_log為錯(cuò)誤信息日志/opt/apache/logs//opt/apache/logs/ssl_engine_log 為ssl引擎日志,即ssl的運(yùn)行日志,可以通過(guò)查看此日志了解運(yùn)行狀態(tài)及錯(cuò)誤。 日常維護(hù)維護(hù)分為:業(yè)務(wù)維護(hù)及系統(tǒng)維護(hù)業(yè)務(wù)維護(hù)就是,利用系統(tǒng)管理員的身份,查看操作日志系統(tǒng)維護(hù)是:定期查看系統(tǒng)日志,apache日志等,看是否有運(yùn)行錯(cuò)誤,并定期備份日志??梢约訁?shù) h[oraclelocalhost server]$ df hFilesystem Size Used Avail Use% Mounted on/dev/cciss/c0d0p2 103G 91G 8% //dev/cciss/c0d0p1 99M 13M 82M 13% /bootnone 1% /dev/shm/dev/cciss/c0d0p5 30G 181M 28G 1% /home注意:當(dāng)某空間使用率超過(guò)85%時(shí),通過(guò)du查看是哪些文件占用的空間比較大例如/home使用了85%cd /home以root用戶查看su輸入root用戶密碼[rootlocalhost /] du m maxdepth=1m是以M大小顯示maxdepth=1表示只是一級(jí)子目錄的大小,如果想查看二級(jí)的就寫為2找出占用很大的文件,經(jīng)判斷后決定刪除或轉(zhuǎn)移。輸入:[oraclelocalhost /]$ top輸出:top 10:52:46 up 6 days, 39 min, 2 users, load average: , , Tasks: 123 total, 1 running, 122 sleeping, 0 stopped, 0 zombieCpu(s): % us, % sy, % ni, % id, % wa, % hi, % siMem: 8247956k total, 1828612k used, 6419344k free, 119476k buffersSwap: 8385920k total, 0k used, 8385920k free, 1526064k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 1 root 16 0 3004 552 472 S 0: init 2 root RT 0 0 0 0 S 0: migration/0 3 root 34 19 0 0 0 S 0: ksoftirqd/0 4 root RT 0 0 0 0 S 0: migration/1 5 root 34 19 0 0 0 S 0: ksoftirqd/1 6 root RT 0 0 0 0 S 0: migration/2 說(shuō)明:當(dāng)發(fā)現(xiàn)個(gè)別進(jìn)程占用率很高,可以通過(guò)用“ps –axj | grep 進(jìn)程名”查看這個(gè)進(jìn)程在進(jìn)行什么操作,如果發(fā)現(xiàn)這個(gè)進(jìn)程持續(xù)的時(shí)間很長(zhǎng),而且非系統(tǒng)必要進(jìn)程;可以通過(guò)“kill –9” 進(jìn)程的PID號(hào),將進(jìn)程殺死。 定期查看root郵件輸入:[oraclelocalhost log]$ su lPassword: [rootlocalhost root] mail輸出: 1 root Fri Sep 8 16:23 18/704 HP Insight Management Agents Trap Alarm N 2 root Fri Sep 8 16:23 18/684 HP Agent Trap Alert N 3 root Fri Sep 8 16:23 19/748 HP Insight Management Agents Trap Alarm說(shuō)明:前面為N的表示新郵件可以在amp。d 110這樣就會(huì)刪除110的信。這樣當(dāng)數(shù)據(jù)庫(kù)出現(xiàn)故障時(shí),我們就可以利用備份文件與歸檔方法相結(jié)合,作數(shù)據(jù)庫(kù)“最新?tīng)顟B(tài)”的恢復(fù)。所備份的數(shù)據(jù)文件存儲(chǔ)于磁陣上的硬盤。通過(guò)查看v$recover_file 來(lái)確定哪些文件需要恢復(fù),通過(guò)查看v$datafile視圖查看文件ID和文件名之間的相關(guān)性通過(guò)下面的命令查看需要恢復(fù)的數(shù)據(jù)文件的文件ID號(hào):select file, online, error from v$recover_file。通過(guò)這些信息,決定對(duì)哪些文件進(jìn)行恢復(fù),及其采用的恢復(fù)方式。在數(shù)據(jù)庫(kù)打開(kāi)的情況下,如果是system表空間的數(shù)據(jù)文件出現(xiàn)介質(zhì)失敗,那么oracle需要在mount狀態(tài)下恢復(fù)其數(shù)據(jù)文件,如果是其他表空間,可以只對(duì)介質(zhì)失敗涉及到的數(shù)據(jù)文件進(jìn)行恢復(fù),即在數(shù)據(jù)庫(kù)打開(kāi)的狀態(tài)下進(jìn)行恢復(fù)。ERROR:ORA00604: error occurred at recursive SQL level 1ORA01116: error in opening database file 1ORA01110: data file 1: 39。ORA27041: unable to open fileLinux Error: 2: No such file or directoryAdditional information: 3System出現(xiàn)介質(zhì)失敗,表示被誤刪或被損壞,可以執(zhí)行如下:1)首先登錄SQL*PLUS并啟用SYSDBA權(quán)限輸入::sqlplus user/passwdoracmts。 (啟動(dòng)SYSDBA權(quán)限)shutdown abort (關(guān)閉數(shù)據(jù)庫(kù))startup mount (加載數(shù)據(jù)庫(kù))也可以通過(guò)查看視圖,確定哪個(gè)文件需要恢復(fù)SQL select file,error from v$recover_file。 FILENAME 1/opt/oracle/oradata/oracmts/ 2/opt/oracle/oradata/oracmts/ 3/opt/oracle/oradata/oracmts/ FILENAME 4/opt/oracle/oradata/oracmts/知道要恢復(fù)的是1():2)在SQL提示符下輸入alter database datafile 39。 offline?;騬ecover datafile 39。如果不需要?dú)w檔日志文件進(jìn)行恢復(fù),即輸出Media recovery plete.如果需要?dú)w檔日志文件參與恢復(fù),即輸出:ORA00279: change 2246878 generated at 07/22/2005 16:28:13 needed for thread 1ORA00289: suggestion : /opt/oracle/oradata/archive /ORA00280: change 2246878 for thread 1 is in sequence 167Specify log: {RET=suggested | filename | AUTO | CANCEL}輸入:auto即可自動(dòng)完成恢復(fù)。/opt/oracle/oradata/archive /39。/opt/oracle/oradata/archive /39。/opt/oracle/oradata/oracmts/39。6)打開(kāi)數(shù)據(jù)庫(kù)即可,在SQL提示符下輸入alter database open其他數(shù)據(jù)文件恢復(fù)方法類似,只需要把數(shù)據(jù)文件的名字更改即可。數(shù)據(jù)庫(kù)的日常維護(hù) 檢查數(shù)據(jù)庫(kù)的基本狀況主要介紹如何對(duì)數(shù)據(jù)庫(kù)的基本情況進(jìn)行檢查,內(nèi)容共分三部分,分別為:檢查oracle的進(jìn)程;檢查oracle監(jiān)聽(tīng)進(jìn)程;檢查oracle實(shí)例狀態(tài)。 檢查oracle監(jiān)聽(tīng)進(jìn)程輸入:lsnrctl status輸出:LSNRCTL for Linux: Version Production on 24OCT2006 17:22:28Copyright (c) 1991, 2005, Oracle. All rights reserved.Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=oracle02)(PORT=1521)))STATUS of the LISTENERAlias LISTENERVersion TNSLSNR for Linux: Version ProductionStart Date 24OCT2006 17:22:23Uptime 0 days 0 hr. 0 min. 5 secTrace Level offSecurity ON: Local OS AuthenticationSNMP ONListener Parameter File /opt/oracle/
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