Open Root class docu from command line.

rootdocs.sh

#!/bin/bash

function bail {
  echo You did not enter a valid ROOT class $1
  exit 1
}

if [ -n "$1" ]; then
  if [ `expr match $1 T` == 1 ]; then
    status_code=`curl -o /dev/null -sIw "%{http_code}" http://root.cern.ch/root/html/$1.html`
    if [ $status_code == 200 ]; then
      xdg-open http://root.cern.ch/root/html/$1.html &
    else bail \(404\)
    fi
  else bail
  fi
else bail
fi

unset status_code