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| Cron needs a special configuration file to tell it how to operate. | Cron needs a special configuration file to tell it how to operate. It is suggested that this file be called {{{~/.crontab}}}, though it can have any name. |
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| TODO: Describe format. Suggest calling this file {{{~/.crontab}}}. | For an explanation of the format of this file, run: {{{ man 5 crontab }}} |
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| TODO: crontab ~/.crontab. | Once you are satisfied with your setup, run the following command to activate your changes, assuming that your configuration file is called {{{~/.crontab}}}: |
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| = Exmaples = | {{{ crontab ~/.crontab }}} |
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| TODO: Give examples, based on example given near the end of MemberManual/RunningUnattendedCommands. | = Examples = One convention for making scripts to run commands in their own PAG, as specified by the [:MemberManual/RunningUnattendedCommands:Running Unattended Commands page], is to create the {{{~/scripts}}} directory, and place your scripts there. Then, make a cron configuration file that looks something like this. {{{ 09 0 * * 0 ~/scripts/clean-mail 11 0 * * 0 ~/scripts/remove-tmp 12 0 * * 0 ~/scripts/weekly-comment-check */10 * * * * ~/scripts/make-git-projects }}} |
This page describes the basic use of cron on HCoop systems.
Prerequisites
It is very important that you read the [:MemberManual/RunningUnattendedCommands:Running Unattended Commands page] to understand the general idea of how to run unattended commands on Mire.
Making a cron configuration file
Cron needs a special configuration file to tell it how to operate. It is suggested that this file be called ~/.crontab, though it can have any name.
For an explanation of the format of this file, run:
man 5 crontab
Activating your cron configuration
Once you are satisfied with your setup, run the following command to activate your changes, assuming that your configuration file is called ~/.crontab:
crontab ~/.crontab
Examples
One convention for making scripts to run commands in their own PAG, as specified by the [:MemberManual/RunningUnattendedCommands:Running Unattended Commands page], is to create the ~/scripts directory, and place your scripts there. Then, make a cron configuration file that looks something like this.
09 0 * * 0 ~/scripts/clean-mail 11 0 * * 0 ~/scripts/remove-tmp 12 0 * * 0 ~/scripts/weekly-comment-check */10 * * * * ~/scripts/make-git-projects