On Mon, Apr 21, 2014 at 8:18 PM, paul g <pj.world at hotmail.com> wrote:

> FOO=bar <----mean?


Those are environment variables.

Open up a command prompt and type "env" to see your current environment
variables listed.

Some of these variables are system-wide variables, set from the
/etc/environment file, and some are per-user variables, set in your
~/.bashrc for instance. You can manually set an environment variable if
needed with something like:

$ export MYSWEETVARIABLE=foobar

...then you can verify it's been set:

$ env | grep SWEET
MYSWEETVARIABLE=foobar

Note: this variable will only exist for your current shell instance. Once
you exit that shell, the variable will go away. If you need persistent
environment variables, add them to your ~/.bashrc file.

Also note: if you need a variable to only last for the execution of a
single command, you can do this:

$ MYSWEETVARIABLE=foobar /path/to/command

-Erik
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