crontab
定时任务启动时的 workdir 为用户家目录
具体格式参照 crontab -e 时的系统提示格式 如Ubuntu:# m h dom mon dow command
# 格式是：分 时 日 月 星期 要运行的命令
# week (0 - 6) = sun,mon,tue,wed,thu,fri,sat
# 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,...,sat
# | | | | |
# * * * * * user-name command to be executed
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usage
usage: crontab [-u user] file
crontab [ -u user ] [ -i ] { -e | -l | -r }
(default operation is replace, per 1003.2)
-e (edit user's crontab)
-l (list user's crontab)
-r (delete user's crontab)
-i (prompt before deleting user's crontab)
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tldr
crontab
Schedule cron jobs to run on a time interval for the current user.Job definition format: "(min) (hour) (day_of_month) (month) (day_of_week) command_to_execute".More information: https://manned.org/crontab.
- Edit the crontab file for the current user:
crontab -e
- Edit the crontab file for a specific user:
sudo crontab -e -u {{user}}
- Replace the current crontab with the contents of the given file:
crontab {{path/to/file}}
- View a list of existing cron jobs for current user:
crontab -l
- Remove all cron jobs for the current user:
crontab -r
- Sample job which runs at 10:00 every day (* means any value):
0 10 * * * {{command_to_execute}}
- Sample job which runs every minute on the 3rd of April:
* * 3 Apr * {{command_to_execute}}
- Sample job which runs a certain script at 02:30 every Friday:
30 2 * * Fri {{/absolute/path/to/script.sh}}
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