refs #8533 Cut unknown environment prompt to 3 chars

roles/debian/files/profile.sh

@@ -11,6 +11,8 @@ if [ -f "/etc/vn/env" ]; then
     fi
 
     read -r VN_ENV < /etc/vn/env
+    ENV_TEXT="$VN_ENV"
+
     case "$VN_ENV" in
         lab)
             ENV_COLOR="\033[01;32m"
@@ -26,17 +28,16 @@ if [ -f "/etc/vn/env" ]; then
             ;;
         *)
             ENV_COLOR="\033[01;36m"
+            ENV_TEXT="${VN_ENV:0:3}"
             ;;
     esac
 
-    ENV_TEXT=${VN_ENV^^}
-
     if [ -z "$ENV_TEXT" ]; then
         ENV_TEXT="???"
         ENV_COLOR="\033[01;37m"
     fi
 
-    ENV_TEXT="\[${ENV_COLOR}\]${ENV_TEXT}\[\033[00m\]"
+    ENV_TEXT="\[${ENV_COLOR}\]${ENV_TEXT^^}\[\033[00m\]"
     PS1="\u@$SHORT_HOST[$ENV_TEXT]:\w"
 
     if [ "$(id -u)" -eq 0 ]; then