From dc268f31987caaa1e95716c85414acd96ec9369b Mon Sep 17 00:00:00 2001
From: Samson-W <sccxboy@gmail.com>
Date: Fri, 24 Aug 2018 01:54:34 +0800
Subject: [PATCH] Add a method to check if the version of debian is 9.

---
 lib/utils.sh | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/lib/utils.sh b/lib/utils.sh
index ab843fb..4a73582 100644
--- a/lib/utils.sh
+++ b/lib/utils.sh
@@ -382,3 +382,14 @@ is_pkg_installed()
         FNRET=1
     fi
 }
+
+is_debian_9()
+{
+    if $(cat /etc/debian_version | grep -q "^9.[0-9]"); then
+        debug "Debian version is 9.*."
+        FNRET=0
+    else
+        debug "Debian version is not 9.*."
+        FNRET=1
+    fi
+}