Troubleshooting: Could not update .ICEauthority file

Here is the error message that might encounter duing gnome desktop startup.

Could not update .ICEauthority file 
/var/lib/gdm3/.ICEauthority

I have resolved this problem by simply removing that file and let gdm3 daemon re-create it. The commands below must be executed with root privileges.

/etc/init.d/gdm3 stop
rm /var/lib/gdm3/.ICEauthority*
/etc/init.d/gdm3 start

Note, restarting gdm not helps all the time, so try reboot computer instead.

How to Backup and Restore OpenLDAP Database

Instead of backup / restore of actual ldap database (hdb, etc) we will export/import ldap directory tree into ldif format that ultimately let us do the same, however without any particular database implementation specifics.

Backup

The backup will be stored in backup.ldif text file.

#!/bin/sh

slapcat -v -l ldap.diff

Restore

The restore will go through replacing current database from a one we have in ldif backup.

#!/bin/sh

# Stop slapd daemon
/etc/init.d/slapd stop

# Remove current database
rm -rf /var/lib/ldap/*

# Import directory tree from backup
slapadd -l backup.ldif

# Fix permissions
chown -R openldap:openldap /var/lib/ldap/*

# Start slapd daemon
/etc/init.d/slapd start