CentOS7安装定时任务

q66262

　　CentOS7使用cron和anacron用来定期重复执行指令

1.服务安装

1.1   查看是否安装yum-cron

    rpm -q yum-cron

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1.2    安装cronie

    yum -y install cronie

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1.3    安装yum-cron

    yum -y install yum-cron

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1.4    备注

　　单独安装yum-cron也可以，因为yum会自动检测到yum-cron需要一来到cronie然后自动安装

2.基本操作

2.1   启动

    systemctl start crond
systemctl start yum-cron

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2.2 停止

    systemctl stop yum-cron
systemctl stop crond

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2.3   查看状态

    systemctl status crond.service

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2.4   重新加载

    systemctl reload crond.service
2.5   重新启动

    systemctl restart crond.service
2.6 卸载

    yum -y remove yum-cron
yum -y remove cronie
2.7   设置开机启动

    systemctl enable crond.service
2.8   查看是否开机启动

2.8.1 列出所有已经安装的服务及状态

    systemctl list-unit-files

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3. 定时任务编辑

3.1   查看当前用户的crontab

    crontab -l

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3.2   编辑crontab

    crontab -e

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3.3 重新加载

    systemctl reload crond.service
3.4 查看执行结果

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3.5 删除crontab

    crontab -r