Do you live life on the command line, but often forget which terminal is your local box and which is SSH'd into your critical server? There are a number of fixes for this - chiefly, don't be an idiot and look where you are typing first. You might also want to use a different virtual desktop for SSH sessions.
But perhaps the easiest, most obvious way is to change the terminal prompt. Default prompts on unix systems are usually grey or white on a black background, or sometimes the reverse. How much more obvious can it be that you are somewhere else if your prompt is entirely different, like maybe flashing bold red with some warnings?
The prompt for almost all shells is included in the PS1 system variable, so we just need to change that to change the prompt. try the following:
export PS1="\e[48;34m \u@\H:\W\e[m>\$ "
You can get a list of the escaped characters used to make up the prompt here:
www.gnu.org/software/bash/manual/bashref.html#SEC83. Remember to write this to the .bashrc file in your user directory to make it permanent-
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