`pass` is a versatile, yet simple command line password manager that follows the Unix philosophy. The application saves each password in an encrypted GPG file and allows organizing them in various folder hierarchies.
As you administer servers, you will begin to spend a lot of time on the command line. Most likely, you will be using the bash shell. The bash shell includes a lot of commands and expansion capabilities to take advantage of the input you have typed in
In case anyone else comes along, I had the same problem using Apache 2.4.6 (Ubuntu). It had to do with apache not having permission to /usr/lib/iipimage-server. I simply copied that to /usr/share/iipimage-server and adjusted the path in iipsrv.conf and the url worked.