what is an environment variable?

Thufir Hawat hawat.thufir at gmail.com
Fri Mar 16 23:03:48 UTC 2012

I've looked at https://help.ubuntu.com/community/EnvironmentVariables and 
some other resources, but it's still unclear to me *what* $PATH is.  
There's no corresponding file, just various files which add to the this 
variable.  (It's a shell variable?)

How do you see all the files which effect $PATH?  You just have to go 
through ~/.bash* and ~/.profile* and such, as well as /etc/evironment?

Once something is added to $PATH, how do you remove it?


thufir at caladan:~$ 
thufir at caladan:~$ nl /etc/environment 
     1	PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/
thufir at caladan:~$ 
thufir at caladan:~$ echo $PATH
thufir at caladan:~$ 

I cannot find any existing file which would add .rvm to $PATH, so why 
does that "stick" there?  I logged out, just to be sure.  


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