Installation-instructions.md

 # Install packages on debian host system
 ```bash
 apt install acl dnf rpm git systemd-container rsync voms-clients
+# (possibly rpm is not needed for manual image building)
 ```
 
 # Clone git and checkout config files
@@ -58,9 +59,11 @@ groupmod -g $XRD_GID_HOST xrootd
 
 # Directories for bind mounts
 Create directories for bind mounts and make them owned by xrootd where nescessary. Here one needs to check that the data directory is the correct path (e.g. the path where the raid system is mounted) and possibly adjust the bind mount in `/etc/systemd/nspawn/xcache.nspawn`
+
+Note: Assuming the data directories are under `/srv/xache` and are as configured in `/etc/xrootd/xcache.cfg`
 ```bash
-mkdir -p /var/spool/xrootd /var/run/xrootd /srv/data/xrootd/namespace /srv/data/xrootd/xrdcinfos /srv/data/xrootd/data
-chown xrootd:xrootd /var/spool/xrootd /var/run/xrootd /srv/data/xrootd/namespace /srv/data/xrootd/xrdcinfos /srv/data/xrootd/data
+mkdir -p /var/spool/xrootd /var/run/xrootd /srv/xcache/namespace /srv/xcache/xrdcinfos
+chown -R xrootd:xrootd /var/spool/xrootd /var/run/xrootd /srv/xcache
 
 # if not existing
 mkdir -p /etc/grid-security