The crontab on solaris is a bit different to Linux.
Great is that you can use the same command on both system to get access
A bit strange, if you want to add a job which runs every 5 minuits you simply add a line like on Linux:
*/5 * * * * command you want to run
On Solaris this is
0,5,10,15,20,25,30,35,40,45,50,55 * * * * command you want to run
According to my research via google this is caused by the V7 standard which Solaris uses.