add missing packages

rhel8/index.md

@@ -33,10 +33,27 @@ It looks like it works already a lot out of the box, but no guarantee can be giv
 On the very first puppet run the command to install the GUI packages takes up to 10 minutes and it looks like it
 is hanging. Usually it is after the installation of `/etc/sssd/sssd.conf`. Just give it a bit time.
 
+#### Missing or Replaced Packages
+
+[List of packages removed in RHEL 8](https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html-single/considerations_in_adopting_rhel_8/index#removed-packages_changes-to-packages)
+
+| RHEL 7 | RHEL 8 | remarks |
+| ---    | ---    | ---     |
+| `a2ps`   | recommends to use `enscript` instead | [`enscript` upstream](https://www.gnu.org/software/enscript/) [`a2ps` upstream](https://www.gnu.org/software/a2ps/)   |
+| blt | - | [`blt` upstream](http://blt.sourceforge.net/) |
+| ... | ... | here I stopped research, please report/document further packages |
+| `devtoolset*` | `gcc-toolset*` | |
+
 #### Installing a Machine with YFS and an Old Package Snapshot Tag
 After the `pli-firstboot` script it stopps due to errors (installed yfs kernel module version does not fit running kernel). Still it manages to install everything fine.  
 So please restart the machine (so it loads the right kernel) and run `puppet agent` again to finally start and enable the `yfs-service`.
 
+#### "yum/dnf search" Gives Permission Denied as Normal User
+It works fine beside the below error message.
+```
+Failed to store expired repos cache: [Errno 13] Permission denied: '/var/cache/dnf/x86_64/8/expired_repos.json'
+```
+
 
 ## Documenatation