Bash: prompt for tmux to show MOTD in SSH sessions

bash/.bashrc.append

@@ -29,6 +29,15 @@ popd() {
 	cd .
 }
 
-if [ -z "$TMUX" ] && [ "$PWD" == ~ ]; then
-	tmux new -As default
+if [ -z "$TMUX" ] && [ -n "$SSH_TTY" ]; then
+	tput sc
+	tput smso
+	echo -n 'tmux: space - shell: any key'
+	tput sgr0
+	read -rsN1 input
+	tput rc
+	tput el
+	if [ "$input" = ' ' ]; then
+		tmux new -As default
+	fi
 fi