Crontab in Raspberry pi doesn't run a very simple script

Question

I'm new to Linux and I've been struggling with this issue for a while in my Raspberry Pi and had no success.

First I wrote a simple script in /home/myfile.sh like this:

#!/bin/bash
clear
echo "hi"

Then I did the sudo chmod 755 /home/myfile.sh to grant the permissions.

And finally I modified the crontab using crontab -e:

# some comments ...
* * * * * /home/myfile.sh

The problem:

When I run the script manually it works fine but when I set the above line in my crontab, nothing ever happens. What am I doing wrong?

Answer 1

In order to show how I managed to solve my issue with the hope of helping others, Here I post it as an answer to my own question:

I got around the problem by using system-wide crontab (/etc/crontab) instead of per user crontab (crontab -e).

To clarify this,

/etc/crontab is the system-wide crontab:

# m h dom mon dow user      command
*   *  *   *   *  someuser  echo 'foo'

while crontab -e is per user 'crontab':

# m h  dom mon dow  command
*   *   *   *   *   echo 'foo'

Notice in a per user crontab there is no 'user' field.