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Auto aliasing of ssh hosts

/ Published in: Bash
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A bash script that auto register ssh aliases of known hosts (as seen at http://blogs.ubuntu-nl.org/dennis/2008/07/29/traincoding-ssh-aliases/).

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  1. if [ -d ~/.ssh ]; then
  2.  
  3.     # Touch files we expect to exist
  4.     if [ ! -e ~/.ssh/config ]; then touch ~/.ssh/config; fi
  5.     if [ ! -e ~/.ssh/known_hosts ]; then touch ~/.ssh/known_hosts; fi
  6.  
  7.     # Parse ~/.ssh/known_hosts and ~/.ssh/config to find hosts
  8.     for x in `sed -e ’s/[, ].*//’ ~/.ssh/known_hosts; awk ‘/^Host [^*?]+$/{print $2}’ ~/.ssh/config`; do
  9.  
  10.         # Don’t override commands
  11.         type $x > /dev/null 2>&1 && continue
  12.         alias $x=”ssh $x”
  13.  
  14.         # Remove the domainname
  15.         y=${x/.*/}
  16.         if [ "$y" != "$x" ]; then
  17.             if ! type $y > /dev/null 2>&1; then
  18.                 alias $y=”ssh $x”
  19.             fi
  20.         fi
  21.  
  22.         # Remove prefix. Add prefixes you want removed here
  23.         y=${y/pf1-/}
  24.         y=${y/pf2-/}
  25.         if [ "$y" != "$x" ]; then
  26.             if ! type $y > /dev/null 2>&1; then
  27.                 alias $y=”ssh $x”
  28.             fi
  29.         fi
  30.     done
  31. fi

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