19 Jul 2017
Phatch is a fantastic tool to process a large number of photos in the
same manner. For example, I use it to shrink images to show on a digital
picture frame. Unfortunately it has not been maintained for years, and it
will not start on recent versions of Ubuntu. Here’s a workaround.
1 Jun 2017
Linux, Samba, Tips & Tricks, Windows
I have some (virtual) Windows machines running in a network of Linux
hosts. I keep some Windows applications (most notably, WSUS
Offline Update) on an external hard drive that is connected to a Linux
host via USB and shared with the Windows machines via Samba. Despite
relaxing the Windows security settings more and more, Windows refused to
run the applications on the shared drive until I made a change to the
Samba configuration on the Linux host.
7 Jan 2017
Howto, Linux, Server, Tutorial
Here I describe how to automate deployment of Discourse to your own
server using Capistrano.
29 Oct 2016
Howto, Linux, Server, Tutorial
Discourse is a fairly new forum software that is very comfortable to use.
As a server administrator, you can either run it from a Docker container,
or pay a fee to use a hosted version.
However, if neither Docker nor subscription fees are feasible options,
setting up a Discourse instance without Docker involves a bit of work.
9 Mar 2016
Fix, Linux, VirtualBox
VBox 5.0 machines sometimes fail to start in Ubuntu; here's a hint how to fix it
25 Sep 2015
Linux, Tips & Tricks, hardware, printing
I have an HP LaserJet P2015dn printer that used to cause me headaches and has been causing trouble for some time now again. …
11 Jul 2015
Linux, OwnCloud, Server, troubleshooting
While upgrading OwnCloud to version 8.1, I experienced strange errors: www-data@server:/var/owncloud$ php occ upgrade
PHP Warning: flock() expects parameter 1 to be …
2 Apr 2015
Linux, OwnCloud, Server
Ubuntu 14.04 LTS ships with an outdated version of the PHP user cache
driver ‘APCu’. OwnCloud, if installed, will complain about this. Here I
describe how to upgrade APCu on Ubuntu.
30 Mar 2015
Linux, OpenLDAP, Server, Tutorial, code
Setting up an OpenLDAP server on Ubuntu is quite complicated, and getting
SSL connection security to work may be the hardest part of it. Here I
describe what worked for me.
16 Jun 2014
Linux, Network, Samba
File and folder sharing using Samba on Linux is easy to set up, but authorizations and permissions need to be set up properly to get it to work. Here I describe how to do it for a home network.
24 Dec 2013
Linux, Tips & Tricks, code
In this article, I describe how to create a single A4-sized PDF document
containing two copied of a single-page, A5-sized PDF document. This is
useful for custom A5 forms that are to be printed in duplicate on A4
sheets, so that two A5 forms can be obtained by cutting the A4 paper.
26 Nov 2013
Linux, Network, Samba, VirtualBox, code
VirtualBox is an excellent tool to run one or many virtual Windows
machines on a Linux host. Its shared folders offer convenient access
to the host file system from the virtual machines. However, shared folders
may not be suitable for specialized tasks such as storing .NET
application-level Office addins. In this article I describe an alternative
way to share folders between the host and guest operating systems using
the Samba file server.
20 Oct 2013
In this post I describe what I had to do to make my local website work again after upgrading to Ubuntu 13.10 with Apache 2.4.
27 Mar 2011
Linux, Mendeley, Tips & Tricks, code
Mendeley is a great piece of Software to organize one’s collection of PDF articles. It did a fairly good job indexing the several thousand …