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diff --git a/wtmux b/wtmux
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+#
+# Worktemux: tmux session wrapper
+# https://robots.thoughtbot.com/a-tmux-crash-course
+#
+
+# Default options.
+opts=""
+
+# Session selection.
+if [ ! -z "$1" ]; then
+  if tmux list-sessions 2> /dev/null | grep -q "^$1:"; then
+    tmux attach -t $1
+    exit $?
+  else
+    session="new -s $1"
+  fi
+
+  if [ "$1" == "root" ]; then
+    sudo tmux attach
+    exit
+  elif [ -f "$HOME/.tmux/$1" ]; then
+    opts="-f $HOME/.tmux/$1"
+  elif [ -f "$HOME/.tmux/base" ]; then
+    opts="-f $HOME/.tmux/base"
+  else
+    opts=""
+  fi
+fi
+
+# Start session.
+tmux $opts $session