add additional link, add crosslink

infrastructure-guide/initial_setup.md

@@ -18,7 +18,7 @@ The steps involved to bootstrap the boot server and the repository server are th
 1. Generate a kickstart file for the system in the https://git.psi.ch/linux-infra/bootstrap repository
     - For the DMZ server the ip of the DNS server needs to be different in DMZ `--nameserver=192.168.70.5`
 
-1. Create a new iso including the generated kickstart file via
+1. Create a new iso including the generated kickstart file via the [mkksiso](https://weldr.io/lorax/mkksiso.html) utility:
     ```
     mkksiso lx-boot-dmz-01.psi.ch.ks rhel-8.7-x86_64-boot.iso  lx-boot-dmz-01-rhel-8.7-x86_64-boot.iso
     ```
@@ -43,5 +43,5 @@ For the initial setup of boot and repos server in the DMZ a temporary firewall a
 ## References
 - https://weldr.io/lorax/mkksiso.html
 - https://access.redhat.com/solutions/60959
-
+- https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/performing_an_advanced_rhel_8_installation/starting-kickstart-installations_installing-rhel-as-an-experienced-user#doc-wrapper