Set host keys to generate on first-boot (vmware-samples#129)

Sets host keys to generate on first-boot.

scripts/linux/photon.sh

@@ -90,7 +90,7 @@ rm -rf /var/tmp/*
 
 # Cleans SSH keys.
 echo '> Cleaning SSH keys ...'
-#rm -f /etc/ssh/ssh_host_*
+rm -f /etc/ssh/ssh_host_*
 
 # Sets hostname to localhost.
 echo '> Setting hostname to localhost ...'

scripts/linux/rhel7-derivative.sh

@@ -121,9 +121,5 @@ sudo chmod +x /home/$BUILD_USERNAME/clean.sh
 echo '> Running the clean script ...'
 sudo /home/$BUILD_USERNAME/clean.sh
 
-### Generate the host keys using ssh-keygen. ### 
-echo '> Generating the host keys using ssh-keygen ...'
-sudo ssh-keygen -A
-
 ### Done. ### 
 echo '> Done.'

scripts/linux/rhel7.sh

@@ -89,7 +89,7 @@ rm -rf /var/cache/dnf/*
 
 ### Clean the SSH keys. ###
 echo '> Cleaning the SSH keys ...'
-#rm -f /etc/ssh/ssh_host_*
+rm -f /etc/ssh/ssh_host_*
 
 ### Sets the hostname to localhost. ###
 echo '> Setting the hostname to localhost ...'
@@ -128,9 +128,5 @@ echo '> Running the clean script ...'
 sudo /home/$BUILD_USERNAME/clean.sh
 ### END: Clean the guest operating system. ###
 
-### Generate the host keys using ssh-keygen. ###
-echo '> Generating the host keys using ssh-keygen ...'
-sudo ssh-keygen -A
-
 ### Done. ###
 echo '> Done.'

scripts/linux/rhel8-derivative.sh

@@ -121,9 +121,5 @@ sudo chmod +x /home/$BUILD_USERNAME/clean.sh
 echo '> Running the clean script ...'
 sudo /home/$BUILD_USERNAME/clean.sh
 
-### Generate the host keys using ssh-keygen. ### 
-echo '> Generating the host keys using ssh-keygen ...'
-sudo ssh-keygen -A
-
 ### Done. ### 
 echo '> Done.'

scripts/linux/rhel8.sh

@@ -89,7 +89,7 @@ rm -rf /var/cache/dnf/*
 
 ### Clean the SSH keys. ###
 echo '> Cleaning the SSH keys ...'
-#rm -f /etc/ssh/ssh_host_*
+rm -f /etc/ssh/ssh_host_*
 
 ### Sets the hostname to localhost. ###
 echo '> Setting the hostname to localhost ...'
@@ -128,9 +128,5 @@ echo '> Running the clean script ...'
 sudo /home/$BUILD_USERNAME/clean.sh
 ### END: Clean the guest operating system. ###
 
-### Generate the host keys using ssh-keygen. ###
-echo '> Generating the host keys using ssh-keygen ...'
-sudo ssh-keygen -A
-
 ### Done. ###
 echo '> Done.'

scripts/linux/ubuntu-server-18.sh

@@ -117,9 +117,14 @@ sudo chmod +x /home/$BUILD_USERNAME/clean.sh
 echo '> Running the clean script ...'
 sudo /home/$BUILD_USERNAME/clean.sh
 
-### Generate the host keys using ssh-keygen. ###
-echo '> Generating the host keys using ssh-keygen ...'
-sudo ssh-keygen -A
+### Set check for ssh keys on reboot; regenerate on reboot if neccessary. ###
+echo '> Setting check for ssh keys on reboot; will regenerate on reboot if neccessary. ...'
+sudo cat <<EOF > /etc/rc.local
+#!/bin/bash
+test -f /etc/ssh/ssh_host_dsa_key || dpkg-reconfigure openssh-server
+exit 0
+EOF
+sudo chmod +x /etc/rc.local
 
 ### Done. ###
 echo '> Done.'

scripts/linux/ubuntu-server-2x.sh

@@ -124,9 +124,14 @@ sudo chmod +x /home/$BUILD_USERNAME/clean.sh
 echo '> Running the clean script ...'
 sudo /home/$BUILD_USERNAME/clean.sh
 
-### Generate the host keys using ssh-keygen. ###
-echo '> Generating the host keys using ssh-keygen ...'
-sudo ssh-keygen -A
+### Set check for ssh keys on reboot; regenerate on reboot if neccessary. ###
+echo '> Setting check for ssh keys on reboot; will regenerate on reboot if neccessary. ...'
+sudo cat <<EOF > /etc/rc.local
+#!/bin/bash
+test -f /etc/ssh/ssh_host_dsa_key || dpkg-reconfigure openssh-server
+exit 0
+EOF
+sudo chmod +x /etc/rc.local
 
 ### Done. ###
 echo '> Done.'