Update 'tools/install.sh'

tools/install.sh

@@ -27,8 +27,7 @@ main() {
   CHECK_ZSH_INSTALLED=$(grep /zsh$ /etc/shells | wc -l)
   if [ ! $CHECK_ZSH_INSTALLED -ge 1 ]; then
     printf "${YELLOW}Zsh is not installed!${NORMAL} Installing zsh\n"
-    apt-get install zsh
-    exit
+    apt-get install zsh -y
   fi
   unset CHECK_ZSH_INSTALLED
 
@@ -117,4 +116,9 @@ main() {
   env zsh
 }
 
+if [ "$EUID" -ne 0 ]
+  then echo "Please run as root"
+  exit
+fi
+
 main