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copied!<p>Xterm-compatible Unix terminals have standard escape sequences for setting the background and foreground colors. I'm not sure if Terminal.app shares them; it should.</p> <pre><code>case $HOSTNAME in live1|live2|live3) echo -e '\e]11;1\a' ;; testing1|testing2) echo -e '\e]11;2\a' ;; esac </code></pre> <p>The second number specifies the desired color. 0=default, 1=red, 2=green, etc. So this snippet, when put in a shared .bashrc, will give you a red background on live servers and a green background on testing ones. You should also add something like this to reset the background when you log out.</p> <pre><code>on_exit () { echo -e '\e]11;0\a' } trap on_exit EXIT </code></pre> <hr> <p>EDIT: Google turned up a way to <a href="http://www.athensexchange.com/blog/155" rel="nofollow noreferrer">set the background color using AppleScript</a>. Obviously, this only works when run on the same machine as Terminal.app. You can work around that with a couple wrapper functions:</p> <pre><code>set_bg_color () { # color values are in '{R, G, B, A}' format, all 16-bit unsigned integers (0-65535) osascript -e "tell application \"Terminal\" to set background color of window 1 to $1" } sshl () { set_bg_color "{45000, 0, 0, 50000}" ssh "$@" set_bg_color "{0, 0, 0, 50000}" } </code></pre> <p>You'd need to remember to run sshl instead of ssh when connecting to a live server. Another option is to write a wrapper function for ssh that scans its arguments for known live hostnames and sets the background accordingly.</p>

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