The shell prompt in bash can be modified to provide useful information. There are environmental variables that can be set to control the prompt string (see the bash manpage for more information). One of the more useful things, in my opinion, to include in the prompt string is the current path (so you always knows […]
*nix operating systems use the following shorthand: . denotes the present directory and .. denotes the parent directory. Names for directories can be conjoined with a /. So ../.. denotes the second directory up from the present directory. You can go down the hierarchy as well as up. Suppose the present directory is foo and […]
After my post about DOI numbers, I realized, to my chagrin, that the online version of the journal that I edit, has no explicit representation of DOI numbers. They occur as part of the URL query string, but in order to extract this information, you have to:
Know what a URL query string is Know the syntax […]
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