Proper way to run a script using cron?

Question

When running a script with cron, any executable called inside must have the full path. I discovered this trying to run wondershaper, when many errors showed when it tried to

Answer 1

Declaring variables inside your cron job is more explicit and easier to maintain : all you have to modify is contained in your cron job, and you don't need to transfer multiple files should you move it to another system.

PATH=/usr/bin:/your/fancy/dir
MYAPPROOT=/var/lib/myapp

*/2 * * * * myappinpath
*/3 * * * * $MYAPPROOT/mylocalapp