Merge pull request #1 from LandmakTechnology/master

Update READme.md

Author: tracy4uk

nexus-installation/READme.md

@@ -17,7 +17,7 @@
 ```sh
 #As a good security practice, Nexus is not advised to run nexus service as a root user, 
 # so create a new user called nexus and grant sudo access to manage nexus services as follows. 
-sudo hostname nexus
+sudo hostnamectl set-hostname nexus
 sudo useradd nexus
 # Grand sudo access to nexus user
 sudo echo "nexus ALL=(ALL) NOPASSWD:ALL" | sudo tee /etc/sudoers.d/nexus
@@ -36,6 +36,7 @@ sudo yum install java-11-openjdk-devel java-1.8.0-openjdk-devel -y
 sudo wget http://download.sonatype.com/nexus/3/nexus-3.15.2-01-unix.tar.gz 
 sudo tar -zxvf nexus-3.15.2-01-unix.tar.gz
 sudo mv /opt/nexus-3.15.2-01 /opt/nexus
+sudo rm -rf nexus-3.15.2-01-unix.tar.gz
 ```
 
 ## Grant permissions for nexus user to start and manage nexus service