Due to their low price and power consumption HPs tiny MicroServer N36L, N40L and N54L are often used as tiny VMware servers in the basement of enthusiastic nerds and geeks. Especially in combination with faul-tolerant ECC memory and a HP SmartArray P410 SAS controller you can built an adequate solid Enterprise-ready …

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When converting a physical Linux server using VMware Converter Standalone the following error message might be displayed if you're using distributed portgroups: 1A general system error occured: failed to poweron vm I found a hint that indicated that the amount of used vCPUs or cores exceeds the license limit of the …

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It is possible that a VM is not responding any more - mostly it's a simple solution to restart the appropriate VM. Under rare circumstances it is possible that this restart process isn't passing through. An indicator for this issue is that the process (which normally only takes a couple of seconds) needs multiple …

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If you're running a PostgreSQL database on a CentOS/RHEL system and moved the data directory to a dedicated partition the following error might occur if you want to monitor the filling level using the Nagios/Icinga plugin check_disk: 1DISK CRITICAL - /var/lib/pgsql/data is not accessible: Permission denied The reason …

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After some time old packages are accumulated in software channels managed by Spacewalk, Red Hat Satellite or SUSE Manager. Especially at least when your hard drive are threaten to get tanked up you should clean up and remove unneeded packages. For this there is a utility called spacewalk-data-fsck - but this tool only …

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If you want to always use the most recent Flash version around with Red Hat Enterprise Desktop (RHED) you'll probably use the Adobe YUM repository. If you're also receiving packages from the RHN channel "RHEL x86_64 Workstation Supplementary" further complications are possible because this channel also offers …

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If you want to list all installed Perl modules - e.g. to make sure all requirements of a Perl application are provided - pmall might help you a lot. On Red Hat Enteprise Linux/CentOS systems the tool is part of the perl-pmtools package and creates an output like below: 1# yum install -y perl-pmtools 2# pmall 3Newt …

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If you use Open Monitoring Distribution (OMD) and don't want to setup a full-fledged Postfix or Sendmail service (e.g. because it is a test system) you might want to have a look at the alternative tool ssmtp for relaying mails to an external mail server. The tool is only recommend if you don't need any local mail …

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Recent bugs and security issue are mapped to necessary updates in the form of errata. Users of the commercial Red Hat Satellite or SUSE Manager server get these information directly from their distributor. Using Spacewalk this needs to be done manually - fortunately there a script CEFS by Steve Meier which automates …

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If problems occur while starting the Open Source Architecture Daemons the issue can have multiple problem causes. This service is used amongst others in combination with Spacewalk, Red Hat Satellite, or SUSE Manager to push configuration jobs or software packages. The following problem causes are possible: The firewall …

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