建站
咨詢
售后
建站咨詢
新聞中心
這篇文章將為大家詳細(xì)講解有關(guān)怎么理解定時(shí)任務(wù)crontab，文章內(nèi)容質(zhì)量較高，因此小編分享給大家做個(gè)參考，希望大家閱讀完這篇文章后對(duì)相關(guān)知識(shí)有一定的了解。
網(wǎng)站的建設(shè)成都創(chuàng)新互聯(lián)專注網(wǎng)站定制,經(jīng)驗(yàn)豐富,不做模板,主營(yíng)網(wǎng)站定制開(kāi)發(fā).小程序定制開(kāi)發(fā),H5頁(yè)面制作!給你煥然一新的設(shè)計(jì)體驗(yàn)!已為成都活動(dòng)板房等企業(yè)提供專業(yè)服務(wù)。
腳本目錄：
[oracle@tangjian ~]$ mkdir -p /u01/app/oracle/rman/scripts/
歸檔目錄：
[oracle@tangjian ~]$ mkdir -p /u01/app/oracle/rman/arch/
創(chuàng)建腳本：（每月一次0級(jí)增量）
[oracle@tangjian ~]$ vi /u01/app/oracle/rman/scripts/full_backup_run.sh
#!/bin/bash
#Usage:test database hot full backup !
export PATH
export ORACLE_BASE=/u01/app/oracle
export ORACLE_HOME=$ORACLE_BASE/product/11.2.0/dbhome_1
export ORACLE_SID=test
export PATH=$PATH:$ORACLE_HOME/bin
DATE=$(date +%Y%m%d)
mkdir -p /u01/app/oracle/rman/$DATE
rman target / < run{ allocate channel c1 type disk; allocate channel c2 type disk; sql'alter system switch logfile'; crosscheck archivelog all; delete noprompt expired archivelog all; backup incremental level 0 database format '/u01/app/oracle/rman/$DATE/test_%U.bk' include current controlfile plus archivelog delete input format '/u01/app/oracle/rman/arch/arch_test_%U.arch'; crosscheck archivelog all; delete noprompt obsolete; delete noprompt backup of database completed before 'sysdate - 32'; release channel c1; release channel c2; } exit; EOF [root@tangjian ~]# chmod -R 775 /u01/app/oracle/rman/scripts/full_backup_run.sh 添加定時(shí)任務(wù)： [oracle@tangjian 20180730]$ crontab -e #rman backup full database shell 52 14 * * * /u01/app/oracle/rman/scripts/full_backup_run.sh 1>/u01/app/oracle/rman/rman_backup_full.log 2>&1 查看任務(wù)列表： [oracle@tangjian 20180730]$ crontab -l 創(chuàng)建腳本：（每星期一次1級(jí)差異增量） [oracle@tangjian ~]$ vi /u01/app/oracle/rman/scripts/level_backup_run.sh #!/bin/bash #Usage:test database hot full backup ! export PATH export ORACLE_BASE=/u01/app/oracle export ORACLE_HOME=$ORACLE_BASE/product/11.2.0/dbhome_1 export ORACLE_SID=test export PATH=$PATH:$HOME/bin:$ORACLE_HOME/bin DATE=$(date +%Y%m%d) mkdir -p /u01/app/oracle/rman/level/$DATE rman target / < run{ allocate channel a1 device type disk; allocate channel a2 device type disk; sql'alter system switch logfile'; crosscheck archivelog all; delete noprompt expired archivelog all; backup incremental level 1 database format '/u01/app/oracle/rman/level/$DATE/test_%U.bk' include current controlfile plus archivelog delete input format '/u01/app/oracle/rman/arch/arch_test_%U.arch'; crosscheck archivelog all; delete noprompt obsolete; delete noprompt backup of database completed before 'sysdate -32'; release channel a1; release channel a2; } exit; EOF [root@tangjian ~]# chmod -R 775 /u01/app/oracle/rman/scripts/level_backup_run.sh 添加定時(shí)任務(wù)： [oracle@tangjian 20180730]$ crontab -e #rman backup full database shell 00 1 1 * * /u01/app/oracle/rman/scripts/full_backup_run.sh 1>/tmp/rman_backup_full.log 2>&1 #rman backup level database shell 00 1 * * 7 /u01/app/oracle/rman/scripts/level_backup_run.sh 1>/tmp/rman_backup_full.log 2>&1 驗(yàn)證腳本可用性： [oracle@tangjian scripts]$ sh full_backup_run.sh [oracle@tangjian scripts]$ sh level_backup_run.sh 常用命令： /sbin/service crond stop 關(guān)閉服務(wù) /sbin/service crond restart 重啟服務(wù) /sbin/service crond reload 重新載入配置 在/etc/rc.d/rc.local這個(gè)腳本的末尾加上（開(kāi)機(jī)自啟）： /sbin/service crond start crontab -u
設(shè)定某個(gè)用戶的cron服務(wù)，一般root用戶在執(zhí)行這個(gè)命令的時(shí)候需要此參數(shù) crontab -l
列出某個(gè)用戶cron服務(wù)的詳細(xì)內(nèi)容 crontab -r 刪除某個(gè)用戶的cron服務(wù) crontab -e
編輯某個(gè)用戶的cron服務(wù) 關(guān)于怎么理解定時(shí)任務(wù)crontab就分享到這里了，希望以上內(nèi)容可以對(duì)大家有一定的幫助，可以學(xué)到更多知識(shí)。如果覺(jué)得文章不錯(cuò)，可以把它分享出去讓更多的人看到。
/sbin/service crond start 啟動(dòng)服務(wù)
網(wǎng)站名稱：怎么理解定時(shí)任務(wù)crontab
文章網(wǎng)址：http://fisionsoft.com.cn/article/jopeod.html
