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+====== Deploy Script Using Case ======
+This script is meant to be used for varnish, but can be adapted for anything.
+<code bash>
+#!/bin/bash
+## deploy-varnish.sh
+## deploy default.vcl and/or reload varnish daemon on all hosts
+if [ $# -lt 1 ]
+then
+  echo "Usage : $0 {deploy|deployall|reload|reloadall}"
+  exit 1
+fi
+case "$1" in
+  deploy)
+    while read -r host
+      do
+        cat conf/default.vcl | ssh $host 'sudo /bin/sh -c "cat > /etc/varnish/default.vcl"'
+      done < <(head -n1 hosts)
+      echo "deployed config to $host"
+  ;;
+  deployall)
+    while read -r host
+      do
+        cat conf/default.vcl | ssh $host 'sudo /bin/sh -c "cat > /etc/varnish/default.vcl"'
+      done < hosts
+      echo "deployed config to all hosts"
+  ;;
+  reload)
+    while read -r host
+      do
+        ssh $host 'sudo /bin/sh -c "/etc/init.d/varnishd reload || /etc/init.d/varnish reload"'
+        echo "reloaded varnishd on $host"
+      done < <(head -n1 hosts)
+  ;;
+  reloadall)
+    read -r -p "Are you sure? [Y/n] " response
+    if [[ $response == "y" || $response == "Y" || $response == "yes" || $response == "Yes" ]]
+    then
+      while read -r host
+        do
+          ssh $host 'sudo /bin/sh -c "/etc/init.d/varnishd reload || /etc/init.d/varnish reload"'
+        done < hosts
+        echo "reloaded varnishd on all hosts"
+    else
+      echo "Abort!"
+    fi
+  ;;
+esac
+</code>