History: Cron

             # Cron


"Cron is a time-based job scheduler in Unix-like computer operating systems. The name cron comes from the word "chronos", Greek for "time". Cron enables users to schedule jobs (commands or shell scripts) to run periodically at certain times or dates" 
http://en.wikipedia.org/wiki/Cron


Tiki doesn't require the use of cron, even if starting in ((Tiki5)), it is possible to use cron jobs to offload some work.

To manage cron jobs in Tiki, please see: ((Scheduler)).

## Web Cron

Starting in ((Tiki17)), it's possible to trigger Web Cron like [https://www.easycron.com|Easycron.com] from a URL or JavaScript.

{img src="display1382" link="display1382" width="400" rel="box[g]" imalign="center" desc="Click to expand" align="center" styleimage="border"}

## Changing tracker item status

In ((Tiki6)), tracker item status can be changed after a period of inactivity, etc. See 
http://doc.tiki.org/Batch#Trackers

## Email sending from Newslettters

Using tiki-bach_send_newsletter.php

See ((Newsletters)) and 
http://doc.tiki.org/Newsletter+User#Sending_newsletters_with_a_cron_batch_job

## Updating advanced rating

Using a custom php script as described in 
http://doc.tiki.org/Advanced+Rating#Appendix

See ((Calculations))

## Search

In ((Tiki9)) there is a shell script for use in cron tasks etc for search index maintenance, with a line like:

{CODE(colors="bash", caption="In Tiki 9")}
30 2 * * * cd path_to_tiki/; php lib/search/shell.php rebuild;sh setup.sh -n
{CODE}

{CODE(colors="bash", caption="In Tiki 12")}
30 2 * * * cd path_to_tiki/; php console.php index:rebuild --log
{CODE} 
This will run the command at 2:30 a.m.

See also: ((Cron Job to Rebuild Search Index))

**Note:**
Keep in mind that some webhosts don't allow you set up a cron, and that's why ((Tiki9)) is expected to include another system to manage cronjob calls in a Tiki site, in order to allow cron jobs in external servers with a special security ((token)).

Alternatively, you can use an online cron job third-party service such as EasyCron: https://web.archive.org/web/20160910095003/https://www.easycron.com/cron-job-tutorials/how-to-set-up-cron-job-for-tiki-newsletters

## Email sending from Daily reports

Using tiki-user_send_reports.php

See ((Daily reports))

## Email sending through a mail queue

Using console.php

See ((Mail Queue))

## Related:

- ((Batch))
- ((pr:Scheduler_presets_20))



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(alias(Cron jobs)) | (alias(Cron tabs)) | (alias(Cronjobs)) | (alias(Crontabs)) | (alias(Cronjob)) | (alias(Crontab))