Some commands not working with Cron

[Kyred]

I am running a linux file server using Ubuntu Server 8.10. I am still new to linux, so I use the machine to practice writing bash scripts and such.

Anyway, I have written a script for my server that emails me daily reports about the server at 6:25 every morning using Cron. The script has been working fine.

However, I've noticed that some commands are not executed properly when Cron executes the script. If I execute the script myself, however, the commands work.

For example, recently I have allowed some friends of mine to putty into my server. I want my daily report to be able to track who has logged in since the last report. The script works if I execute it manually. However, when the script is run through cron, it always says that 0 people have logged in that day. Why is this?

The commands I use in the script are:

date
who
grep
cat
wc -l

[yancek]

You may need to use the full path for commands in the script for it to work in cron.

/bin/date
/bin/cat

or wherever they are on your system.

[i92guboj]

We can't say much without taking a look into the script.