Useful-commands.md

@@ -14,10 +14,12 @@ journalctl -eu systemd-nspawn@xcache [--since ...]
 
 # container commands
 run a command in a new container using the xcache image (as xrootd user)
+(currently not working since we run on read/write image)
 ```bash
 systemd-nspawn -D /var/lib/machines/xcache <command>
 ```
 get a shell (as xrootd user)
+(currently not working since we run on read/write image)
 ```bash
 systemd-nspawn -D /var/lib/machines/xcache /bin/bash
 ```
@@ -25,3 +27,8 @@ get a shell in a running container (as root, usually not nescessary)
 ```
 nsenter --target=$(machinectl show --property Leader xcache | sed "s/^Leader=//")  --all
 ```
+
+inside, one can then switch to a shell as the xrootd user with e.g.
+```
+su -s /bin/bash xrootd
+```