I have mysql installed in Fedora 7.

I want to make mysql a part of the environment, so linux knows the command mysql.

How do I do this?

In the environment there is as variable called PATH. Note that is must be spelled with uppercase letters when refering to the variable.

The purpose of PATH is to contain a list of directories the shell will search through when looking for an executable.

The mysql executable is located in /usr/bin, which is probably not in the user's PATH, but is in the root users PATH. If you can su to root and start mysql, but cannot start mysql as user, then you must add /usr/bin you the user's PATH.

This is how to do it from the command line:
PATH=$PATH:/usr/bin
export PATH

That will add /usr/bin to the current value of $PATH. If you reverse the order (PATH=/usr/bin:$PATH) you will erase your current PATH, and will only have /usr/bin in the PATH.

Great! This solved my problem for now, so thanks a lot and thumps up .
However when I reboot the path disappears and I have to add the Mysql path again.
How do I make it permanent part of my environment, so the path is added at boot?

You can set your path in the .bashrc file

mysql by default should be in the default path on most distro's. Did you happen to do a custom install and placed it elsewhere?

I couldn't find MySql in this distro, which is an "Fedora 7 standart install" as the author described his published virtual appliance.

And yes I did make a custom install of mysql so the path I have to refer to is /usr/local/mysql/bin. I added this path to the file /etc/profile (which where refered to from the the file bashrc), and I now have mysql as a part of my environment even after reboot.

If it was Fedora 7, probably a desktop type install then. A simple:

yum -y install mysql

Would have installed it for you.