installation

OTRS Dashboard / Set up an agent statistic element (widget)

OTRS does provide agent statistics to show on the dashboard. However, this is not enabled by default, so you’ll have to enable this feature in Admin->SysConfig under the identifier of UseAgentElementInStats first. Go and search for it, as usual, then switch it on.

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Some useful terminal color scheme settings (mc, yast) on sles linux

I’m not very much into suse linux, only lately for a couple of times. However, I want to share these settings to be injected on each and every new system for essential readabilty of some console screens. Problem is, for some apps, midnight commander and yast so far, the default color scheme settings provide that less contrast, see below, that you’re literally guessing pixels instead of just reading text.
As given in the referenced posts, only small tweaks are actually necessary to achieve much better results, I’ll give examples as well, so go for it, don’t postpone to the next and the next and the next… login 😉

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Getting LauncherFolders up and running on Ubuntu 16.04.4

LauncherFolders (http://unity-folders.exceptionfound.com , https://itsfoss.com/group-apps-unity-launcher-launcherfolders) is a great extension to the unity launcher, in being lightweight abd shipping a lot of bang when it only comes to set up containers organizing your apps. However, obviously the code has been crafted back in the Ubuntu 14.04 era, leaving open issues for installation on more modern Ubuntu releases.

First of all, the official ppa (ppa:asukhovatkin/unity-launcher-folders) will no longer register successfully for security reasons such that one has to ressort back to the original deb installation medium (http://unity-folders.exceptionfound.com/unity-launcher-folders_1.0.3_all.deb).

The next fixes, run the app from the console to see the error messages, are documented in (https://askubuntu.com/questions/934916/ubuntu-launcher-folder-not-working) and (https://ubuntuforums.org/showthread.php?t=2325175 , comment #5):

sudo apt install python-gobject python-pil
gksudo gedit /usr/lib/python2.7/dist-packages/unity_launcher_folders/generateIcon.py
#17 change: "import Image" -> "from PIL import Image"

Getting this far, the app itself comes up and is operable as expected. Pity is but, that the folder pane does not show up when clicking the generated launcher item (though it worked in the preview mode). The launcher item itself is nothing more than some .desktop file in (~/.local/share/applications/Browser.desktop). On inspection, we have this exec entry:

Exec=/usr/share/unity-launcher-folders/drawer.py "/home/anyone/.appDrawerConfig/Browser.pickle"

Giving it another console output run reveals another missing python dependency:

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Oracle linux 7.x reboot systemd swap target timeout workaround

There is an issue around currently for Red Hat based systems, Oracle Linux here, in version 7.3. running systemd version 219-30.0.1, having a shutdown or reboot seemingly hang on a failed swap unit (deallocation). A lot of posts on the net discuss the issue, After switching to Ubuntu 15.04 laptop won’t shutdown suggested the w/a, doing a swapoff/swapon bounce in advance, that worked for me, referencing reboot hangs at ‘Reached target Shutdown’. Systemd: Hangs indefinitely on >90% of reboot attempts comprises in in-depth analysis.

I’m not shure, though, whether tmp.mount.hm4: After swap.target is releated, really, because the implemented change is already present on my systems (systemd‘s). I’m much more tending to suspect widespread storage fragmentation on the swap area to cause the relatively long term swap off run-times. In addition, I almost only experienced the issue for systems that have been up for a longer number of days, say from 90 days onwards.

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Deprecation announcement of oracle restart along 12c withdrawn

As being spotted on Bjoern Rost’s blog, commented by Trap, today, Oracle obviously has been backing down on the deprecation announcement of oracle restart along 12c. On metalink, see:

Withdrawn: Deprecation Announcement of Oracle Restart with Oracle Database 12c (Doc ID 1584742.1)

This is good news, accepted with delight, since we do no longer need to turn back the hands of time into the nifty-oracle-bounce-handycraft-scripts-era. In fact, I wonder how many dba’s are already comfortable with systemd service registration. I suppose, a lot of dba’s would have been resorting back to the dusty sysv configurations, using the systemd-sysv-compatibility engine, which is sort of retrofitting a car-key-starter with a car that already comes with wireless keying and just some starter button. Look around, the major share of on-premise oracle database installations is still single instance compared to rac and even 12c-containers.

Have fun, Peter