Crontab scheduled tasks using notes

As used herein, the linuxinside crontabof the timing tasks running phpprogram

A. crontabUse the command

crontab -eEnter crontab
service crond restart/reloadreboot / reload crontab(here crond)
tail -f /var/log/conto view cronthe log

II. crontabText code

1. Use curlscripts execute the script

0 3 * * * /usr/bin/curl http://xxx.com/api/method > /dev/null 2>&1 &

1. Use phpexecute the script execution procedures

0 3 * * * /usr/bin/php http://xxx.com/api/method > /dev/null 2>&1 &

Use phpscripts Note
1. The file must have access allows phppermission to execute the program read and write
2 phpscripts and so can not use the $ _SERVER phpsuperglobal (but this is way more quickly)

Also: with whereis 软件can easily find software location

III. Time crontab cron job description

1. */1 * * * *Once per minute
   0 3 * * *executed once a day at 3 am

2. Address verification crontab time
   https://crontab.guru/

Reproduced in: https: //www.jianshu.com/p/960748e0fe2b