mirror of https://github.com/FreshRSS/FreshRSS.git
Adding a note about cron and stderr informations (#2457)
Avoid cron sending email in case of success command
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@ -78,6 +78,22 @@ cd /usr/share/FreshRSS
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# Optimize database (reduces the size) for a given user (perform `OPTIMIZE TABLE` in MySQL, `VACUUM` in SQLite)
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```
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#### Note about cron
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Some commands display informations on standard error, cron will send an email with thoses informations every time the command will be executed (exited zero or non-zero).
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To avoid cron sending email on success:
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```sh
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@daily /usr/local/bin/my-command > /var/log/cron-freshrss-stdout.log 2>/var/log/cron-freshrss-stderr.log || cat /var/log/cron-freshrss-stderr.log
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```
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Explanations:
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- _/usr/local/bin/my-command > /var/log/cron-freshrss-stdout.log_ : redirect the standard output to a log file
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- _/usr/local/bin/my-command 2> /var/log/cron-freshrss-stderr.log_ : redirect the standard error to a log file
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- _|| cat /var/log/cron-freshrss-stderr.log_ : if the exit code of _/usr/local/bin/my-command_ is non-zero, then it send by mail the content error file.
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Now, cron will send you an email only if the exit code is non-zero and with the content of the file containing the errors.
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## Unix piping
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