I have the cron job as shown below, and wanted it to run every 2 hours, but it keeps running every 2 minutes.
Can someone tell me where I'm going wrong?
* */2 * * * /pathtoscript

An asterisk in the minute (first) field tells it to run every minute, regardless of the other fields. You need to specify an exact minute to run within the hour. Be that on the hour (0), half past (30), etc..



Also you can do by this
or if you want to be more specific on every 2 hours, you can use
The hours values should be sparated by commas. 


Off the top of my head, you could try specifying all the hours when it should run:


The correct description of what you had
is "run every minute where the hour is a multiple of 2". Which means 00:00 to 00:59, 02:00 to 02:59, 04:00 to 04:59, ... and so on. Not quite the same as "run every minute". The solution already given is valid though. 

