default cron shell

hi,

when i finish editing my cron, a messagge appears "commands will be executed using /usr/bin/sh"

Can I change this default?

I want to run my cron jobs using /usr/bin/ksh.

I know that i can do it putting one more line within scripts
#!/usr/bin/ksh

but, i want to cron one line commands sometimes.

thanks

One way.

 echo "< my one line commands goes here >" | /bin/ksh

* * * * * /bin/ksh a_script_name.sh