Update READme.md

Author: legah2045

Maven-installation/READme.md

@@ -18,7 +18,7 @@
 ``` sh
 # install Java JDK 1.8+ as a pre-requisit for maven to run.
 
-sudo hostname maven
+sudo hostnamectl set-hostname maven
 cd /opt
 sudo yum install wget nano tree unzip git-all -y
 sudo yum install java-11-openjdk-devel java-1.8.0-openjdk-devel -y