diff --git a/bin/startRuby b/bin/startRuby
index 3c30999..1f41d49 100755
--- a/bin/startRuby
+++ b/bin/startRuby
@@ -5,12 +5,21 @@
 
 gb=https://www.yatex.org/gitbucket/
 repo=ssh://git@jdgb/JD2021student/Ruby.git
+edom=itl.koeki-u.ac.jp
 
 if ! curl -s $gb/signin >/dev/null; then
   echo "No network" >&2; exit 1
 fi
 
 start() {
+  if [ ! -s $HOME/.gitconfig ]; then
+    if ! grep -q user.email $HOME/.gitconfig; then
+      getent passwd `logname` | if IFS=: read u p uid gid gecos rest; then
+	git config --global user.name  "$gecos"
+	git config --global user.email "$user@$edom"
+      fi
+    fi
+  fi
   if [ -d $HOME/Ruby/.git ]; then
     echo "Already have ~/Ruby directory"
     exit 0