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chore(kb/cron): add warning about quoting the percent char

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Michele Cereda
2026-01-05 20:58:35 +01:00
parent 2abfe7402c
commit 29d276ae44
2 changed files with 8 additions and 0 deletions
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6
knowledge base/crontab.md
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@@ -6,6 +6,10 @@
## TL;DR
> [!caution]
> Escape the `%` character if used in commands (e.g., in `date`'s formatting), even if in quotes.<br/>
> Cron interprets `%` as a newline. Everything after it is sent to the command's stdin, not as part of the command.
```sh
# List existing jobs.
crontab -l
@@ -35,7 +39,9 @@ sudo crontab -r -u 'nana'
*/10 * * * * ls
# Run a script at 02:34 every Friday.
# `%` needs escaping even in quotes
34 2 * * Fri /absolute/path/to/script.sh
35 3 * * FRI /absolute/path/to/script.sh > /absolute/path/to/script.$(date '+\%F').log
```
## Further readings