tmux prefix restored

config/.tmux.conf

@@ -1,9 +1,9 @@
 #
 # Ctrl-a is the prefix.
 #
-set -g prefix ALT-b
-bind ALT-b send-prefix
 unbind C-b
+set-option -g prefix C-a
+bind-key C-a send-prefix
 
 # Start windows from #1 (default #0)
 set -g base-index 1
@@ -16,8 +16,9 @@ set -g status-position top
 set -g history-limit 100000
 
 # 256color mode.
-set -g default-terminal "tmux-256color"
-setw -g xterm-keys on
+#set -g default-terminal "tmux-256color"
+set -g default-terminal "xterm-256color"
+# setw -g xterm-keys on
 
 # VI mode
 set -g status-keys vi