crontab FAQ
来源:互联网 发布:师洋淘宝店 编辑:程序博客网 时间:2024/06/12 21:45
1、crontab变量问题
crontab中的脚本需要引入系统变量才能找到,否则crontab中的命令找不到系统变量,或者都写绝对路径。
2、1分钟执行一次
*/1 * * * * /etc/keepalived/test.sh
3、5秒钟执行一次
* * * * * /etc/keepalived/checkMac.sh
* * * * * sleep 5; /etc/keepalived/checkMac.sh
* * * * * sleep 10; /etc/keepalived/checkMac.sh
* * * * * sleep 15; /etc/keepalived/checkMac.sh
* * * * * sleep 20; /etc/keepalived/checkMac.sh
* * * * * sleep 25; /etc/keepalived/checkMac.sh
* * * * * sleep 30; /etc/keepalived/checkMac.sh
* * * * * sleep 35; /etc/keepalived/checkMac.sh
* * * * * sleep 40; /etc/keepalived/checkMac.sh
* * * * * sleep 45; /etc/keepalived/checkMac.sh
* * * * * sleep 50; /etc/keepalived/checkMac.sh
* * * * * sleep 55; /etc/keepalived/checkMac.sh
* * * * * sleep 5; /etc/keepalived/checkMac.sh
* * * * * sleep 10; /etc/keepalived/checkMac.sh
* * * * * sleep 15; /etc/keepalived/checkMac.sh
* * * * * sleep 20; /etc/keepalived/checkMac.sh
* * * * * sleep 25; /etc/keepalived/checkMac.sh
* * * * * sleep 30; /etc/keepalived/checkMac.sh
* * * * * sleep 35; /etc/keepalived/checkMac.sh
* * * * * sleep 40; /etc/keepalived/checkMac.sh
* * * * * sleep 45; /etc/keepalived/checkMac.sh
* * * * * sleep 50; /etc/keepalived/checkMac.sh
* * * * * sleep 55; /etc/keepalived/checkMac.sh
4、You have mail in /var/spool/mail/root
一般这种情况mail的内容就只是一些正常的系统信息或者是比较重要的错误报告。如果你安装了mutt的话直接用这个命令就可以查看mail的内容(用root登陆先),没有装的话用cat /var/spool/mail/root查看(用root登陆先)。
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