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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There are plenty of "apps" for OwnCloud which are expanding the functional range of the open-source software. Currently at about 110 such addons are available for free download. Some of these addons can be installed directly using the "Apps" menu in the administration interface of OwnCloud - some addons require manual …

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When it is necessary to share files between multiple devices and persons OwnCloud is a good alternative for Dropbox. The open-source software that also supports WebDAV can also be installed on a managed web server - for this purpose the project offers a installation script which is transfered to the server using FTP: …

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To keep contacts and calendars up-to-date between multiple devices well-known cloud services like Apple iCloud or the Google services are often used. It's no doubt that this is a very comfortable solution - but in my opinion you shouldn't place trust in public cloud services. I personally avoid cloud services and try …

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VMware released a new version of the famous ESXi Hypervisor one month ago. This tops VMware's portfolio off after the products Fusion, Player and Workstation already were updated in september. Some technichal enhancements of the new version: dropped 32 GB host memory limitation - (a minimum of 4 GB memory is required …

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Earlier this year I tried Windows 8 for the second time - and decided to switch back to Windows 7. One of the reasons was the missing support of my Thinkpad X230's webcam and UltaNav - especially the middle mouse button. It was not possible to use the middle mouse button als middle button. By default a scroll function …

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If you're having issues with configuring Active Directory authentification in VMware vCenter Server Appliance (vCSA) 5.5 you might want to have a look at the following log file: /var/log/vmware/vpx/vpxd_cfg.log Ideally access this file using tail -f before saving the Active Directory configuration to see error messages …

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