Update cheatsheets

crontab

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# crontab
+
+> Schedule cron jobs to run on a time interval for the current user.
+> More information: <https://crontab.guru/>.
+
+- Edit the crontab file for the current user:
+
+`crontab -e`
+
+- Edit the crontab file for a specific user:
+
+`sudo crontab -e -u {{user}}`
+
+- Replace the current crontab with the contents of the given file:
+
+`crontab {{path/to/file}}`
+
+- View a list of existing cron jobs for current user:
+
+`crontab -l`
+
+- Remove all cron jobs for the current user:
+
+`crontab -r`
+
+- Sample job which runs at 10:00 every day (* means any value):
+
+`0 10 * * * {{command_to_execute}}`
+
+- Sample crontab entry, which runs a command every 10 minutes:
+
+`*/10 * * * * {{command_to_execute}}`
+
+- Sample crontab entry, which runs a certain script at 02:30 every Friday:
+
+`30 2 * * Fri {{/absolute/path/to/script.sh}}`