naked-singularity-v0.6.9 :: added debian-keyring package to

naked-singularity install procedure for centos

README

@@ -46,7 +46,7 @@ AUTHOR
 
 VERSION
 
-    0.6.8
+    0.6.9
 
 LAST UPDATED
 

naked-singularity.sh

@@ -301,6 +301,8 @@ naked_install() {
     sudo yum install -y epel-release
     echo 'sudo yum install -y debootstrap'
     sudo yum install -y debootstrap
+    echo 'sudo yum install -y debian-keyring'
+    sudo yum install -y debian-keyring
 
   elif [[ "${operating_system}" = 'ubuntu' ]]; then