Toolserver:Cron

Your crontab is a file that specifies a series of commands to be run at specified intervals. Cron uses that file to actually do this.

opens your crontab for editing, or creates the file if it doesn't exist already.

Save your crontab after editing with.

Syntax
3      2       *       *       0,6     /some/command/to/run 3      2       *       *       1-5     /another/command/to/run >/dev/null
 * 1) minute (0-59),
 * |     hour (0-23),
 * |     |       day of the month (1-31),
 * |     |       |       month of the year (1-12),
 * |     |       |       |       day of the week (0-6 with 0=Sunday).
 * |     |       |       |       |       commands

Output
Cron will email you every time a command runs. To avoid this, you can redirect output.

The  on the second command redirects normal output to nowhere. This will still email you error messages; you can avoid that by appending, which sends 2 (error messages) to the same place as 1 (normal messages). If you want those to go elsewhere, then specify that instead of, for example:

Shortcuts
string         meaning --         --- @yearly         Run once a year, "0 0 1 1 *". @annually      (same as @yearly) @monthly       Run once a month, "0 0 1 * *". @weekly        Run once a week, "0 0 * * 0". @daily         Run once a day, "0 0 * * *". @midnight      (same as @daily) @hourly        Run once an hour, "0 * * * *".

As well, you can do "every five minutes" using