【无标题】crontab定时任务/bin/sh: root: command not found

centos7 crontab定时任务/bin/sh: root: command not found

错误信息

From root@lidong.novalocal  Wed Mar 16 02:30:01 2022
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Subject: Cron  root /var/www/run.sh 
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Date: Wed, 16 Mar 2022 02:30:01 +0000 (UTC)

/bin/sh: root: command not found

shell脚本

#!/bin/bash
echo 'run program start'
/usr/local/bin/python3  /var/www/run.py
echo 'run program finish'

命令crontab -e(错误写法)

 * * * * *  root /var/www/run.sh

命令crontab -e(正确写法)

• 无需加入root，具体如下。

 * * * * *   /var/www/run.sh

/etc/crontab文件和crontab -e命令区别

1、格式不同

前者

# For details see man 4 crontabs

# Example of job definition:
# .---------------- minute (0 - 59)
# |  .------------- hour (0 - 23)
# |  |  .---------- day of month (1 - 31)
# |  |  |  .------- month (1 - 12) OR jan,feb,mar,apr ...
# |  |  |  |  .---- day of week (0 - 6) (Sunday=0 or 7) OR sun,mon,tue,wed,thu,fri,sat
# |  |  |  |  |
# *  *  *  *  * user-name command to be executed

后者

* 1 * * *  command

2、使用范围

• 修改/etc/crontab这种方法只有root用户能用，这种方法更加方便与直接直接给其他用户设置计划任务，而且还可以指定执行shell等等，
• crontab -e这种所有用户都可以使用，普通用户也只能为自己设置计划任务。然后自动写入/var/spool/cron/usename