vrijdag 12 april 2013

Citrix on VMWare: Duplicate user profiles in Documents and Settings

Checking the documents and settings folder I noticed all user profiles are duplicated like


There is only a Local Settings\Application Data\VMware", with an hgfs.dat file in it.

Very strange.....

woensdag 10 april 2013

Windows 2008: PowerShell File Archiving script

I wrote a powershell script which archives files not accessed within a period of days, it first determines which files meet the criteria, then it moves the file to the archive location leaving a shortcut in the original location. Very user-friendly :)

vrijdag 5 april 2013

VMWare: Cannot disable SSH Firewall rule vSphere 5.1 host

After SSH'd to a ESXi 5.1 host I wanted to stop the ssh daemon and then disable the SSH firewall rule via Virtual Center console, which gave me the next error message:

After doing some research I discovered this is a bug in ESXi 5.1

OCS: Certificate for local system with Thumbprint .... is about to expire or already expired.

Suddenly certificate thumbprint events where appearing on our Office Communications Server and several users reported that they are unable to login to OCS.

woensdag 3 april 2013

VMWare: Change Virtual Center service account

Today Virtual Center suddenly stopped responding to our clients. When I tried to restart the Virtual Center Server service it wouldn't start, error message: Couldn't logon with supplied account...strange because nothing changed, at least not that I was aware of.

vrijdag 29 maart 2013

Linux: kernel.warning events not logged

The logfile of my firewall was > 1GB so I archived it and echo'd ( echo > firewall.log ) a new one.
After the cleanup no messages where logged to the new firewall.log file, strange because nothing changed in the configuration.

donderdag 28 maart 2013

Linux: Install AIDE on RedHat

AIDE is widely used to verify the integrity of the system/configuration files.

What AIDE basically does is take a "snapshot" of the state of the system, register hashes,
modification times and other data regarding the files defined by the administrator.
This "snapshot" is used to build a database that is saved and (usually) stored in an external

In this article I will describe how to configure and use AIDE on a RedHat system....

SCCM 2007: WSUS DB maintenance

For a while now the synchronization of updates which are initiated by SCCM via WSUS are terribly slow. It takes hours and hours after SCCM is ready to deploy new updates to the clients caused by a WSUS databases of which the last maintenance job was run probably after the installation a few years ago.

woensdag 27 maart 2013

Linux : Let user's see each others cron jobs

The possibility to look in an other users crontab is only priveleged to the root user. As the root user this can be done with the command crontab -l -u <username>. When multiple users working on the same system it could be desirable to see what cron jobs other users added to the system....