document gvfsd debugging

admin-guide/troubleshooting/gvfs.md

@@ -0,0 +1,13 @@
+# GVFS (Gnome Virtual Filesystem)
+
+GVFS or `gio mount` allows access to different types of network filesystems like SMB/CIFS and protocols like FTP or SFTP.
+
+If Nautilus access to such a destination or a `gio mount ...` does not work, following can be used to see what happens inside `gvfsd`:
+
+```bash
+GVFS_SMB_DEBUG=10 GVFS_DEBUG=1 $(find /usr/lib* -name gvfsd 2>/dev/null) --replace
+```
+of if Kerberos is involved and might be the issue:
+```bash
+KRB5_TRACE=/dev/stdout GVFS_SMB_DEBUG=10 GVFS_DEBUG=1 $(find /usr/lib* -name gvfsd 2>/dev/null) --replace
+```

admin-guide/troubleshooting/kerberos.md

@@ -1,13 +1,13 @@
-# GVFS (Gnome Virtual Filesystem)
+# Kerberos
 
-GVFS or `gio mount` allows access to different types of network filesystems like SMB/CIFS and protocols like FTP or SFTP.
+PSI Kerberos documentation: https://intranet.psi.ch/de/knowledge-base/kerberos-and-afs
 
-If Nautilus access to such a destination or a `gio mount ...` does not work, following can be used to see what happens inside `gvfsd`:
+ - Old AIT AD Kerberos troubleshooting guide: [PDF](../_static/AIT-AD-Kerberos-Troubleshooting.pdf)
+ - Old AIT keytab file documentation: [PDF](../_static/AIT-Keytab-File.pdf)
+
+
+Enable trace log of the Kerberos library to troubleshoot authentication problems (e.g. for curl):
 
 ```bash
-GVFS_SMB_DEBUG=10 GVFS_DEBUG=1 $(find /usr/lib* -name gvfsd 2>/dev/null) --replace
-```
-of if Kerberos is involved and might be the issue:
-```bash
-KRB5_TRACE=/dev/stdout GVFS_SMB_DEBUG=10 GVFS_DEBUG=1 $(find /usr/lib* -name gvfsd 2>/dev/null) --replace
+KRB5_TRACE=/dev/stderr curl -v --negotiate -u : https://boot00-test.psi.ch/sysdb/v1/node > /dev/null
 ```