Crontab command not found

## Cron often clears the whole $PATH environment
## So the shell doesn't know where to look for the command

## You should set the $PATH enviorment in crontab:
PATH="/usr/local/bin:/usr/bin:/bin"
0 1 * * * db2 connect to myDB2

## Or add the $PATH enviorment in your script:
#!/bin/bash
PATH="/usr/local/bin:/usr/bin:/bin"

# rest of script follows

Source: askubuntu.com

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