After the upgrade, I am not able to write to /usr/local/sbin so I placed the scripts in /var/tmp for now. Is there a better place to store these per best practices?if you want, you can re-mount it in read-write mode, place the script and re-mount it back to read-only mode.
sol11302: Change in Behavior: The /usr filesystem is mounted in read only mode
http://support.f5.com/kb/en-us/solutions/public/11000/300/sol11302.html
Now if I put the line in crontab for testing purposes, it is not working. However, I am able to execute the script from bash:did you upload the script from laptop to bigip or just copy-and-paste the content?