crontab

to use bash syntax

* * * * * bash -c 'ls -t /mytest | tail -n +2 | xargs rm --'https://stackoverflow.com/questions/56311070/bash-command-with-pipe-not-working-in-crontab/56311820

cron -e
0 0 * * * /usr/bin/daily-commit
cd ~/Gits/templates/etc/commit
sh ./commit.sh
@monthly

• @reboot

• @hourly - Run at the start of each hour

• @daily - Run every day at midnight UTC

• @weekly - Run at every Sunday at midnight UTC

• @monthly - Run on the 1st of each month at midnight UTC

• @yearly - Run on Jan 1st at midnight UTC

• @annually - Same as @yearly

Where is the cron log file in MacOSX Lion?

I want to troubleshoot a cron job that worked fine until a recent modification, but I can't find the cron log file, where is it?

https://apple.stackexchange.com/questions/38861/where-is-the-cron-log-file-in-macosx-lion

How to Schedule Tasks on Linux: An Introduction to Crontab Files

The cron daemon on Linux runs tasks in the background at specific times; it's like the Task Scheduler on Windows. Add tasks to your system's crontab files using the appropriate syntax and cron will automatically run them for you. Crontab files can be used to automate backups, system maintenance and other repetitive tasks.

https://www.howtogeek.com/101288/how-to-schedule-tasks-on-linux-an-introduction-to-crontab-files/

[tip] 리눅스에서 부팅시 간단하기 시작 프로그램 등록하기

linux 환경에서 구동되는 프로그램을 만들었는데 사용자의 요청에 의해서 리눅스가 처음 시작할때 자동으로 프로그램을 실행하도록 요청을 받을때 간단하게 사용합니다. chkconfig 라는 명령으를 통하여 등록을 할 수도 있지만 리눅스의 부팅과정을 이해해야하며 런레벨에 대한 정보도 학습해야 합니다. 리눅스도 잘 모르는 사용자라 하면 복잡하게 느껴질수도 있습니다. 하지만 해당 방법은 crontab을 통하여 등록할 수 있으며 사용방법이 간답합니다.

https://hmjkor.tistory.com/420

crontab.guru - the cron schedule expression editor

We created Cronitor because cron itself can't alert you if your jobs fail or never start. Cronitor is easy to integrate and provides you with instant alerts when things go wrong. Learn more about cron job monitoring.

https://crontab.guru/every-night-at-midnight

Bash command with pipe not working in crontab

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https://stackoverflow.com/questions/56311070/bash-command-with-pipe-not-working-in-crontab/56311820