Start tmux by default.

.bashrc.dotfiles

@@ -13,3 +13,8 @@ export PS1="[\[\e[32m\e[1m\]\u@\h\[\e[0m\]:\[\e[34m\e[1m\]\w\[\e[0m\]]\$ "
 # Julia environment variables
 export JULIA_PKG_DEVDIR=$HOME/dev
 export JULIA_PROJECT=@.
+
+# Start tmux by default
+if command -v tmux &> /dev/null && [ -z "$TMUX" ]; then
+    tmux attach -t default || tmux new -s default
+fi