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Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Archive for the ‘*nix’ Category

Recommended read: What I learned while securing Ubuntu –

Posted by jpluimers on 2015/11/24

Applying security hardening standards and generally securing Ubuntu has been a challenge.

Tell me about it (:


Source: What I learned while securing Ubuntu –

Posted in *nix, *nix-tools, Linux, openSuSE, Power User, SuSE Linux | Leave a Comment »

Reminder to self: verify which temporary directories really need cleanup through systemd’s tmpfile mechanism

Posted by jpluimers on 2015/11/20

Message from package aaa_base:

sysconfig settings for cleaning up temporary directories are no longer
supported. Some of the features are provided by systemd's tmpfile
mechanism instead. Please refer to 'man tmpfiles.d' for more

Here are the old settings for reference:



Posted in *nix, Linux, openSuSE, Power User, SuSE Linux | Leave a Comment »

StartSSL indeed offers free Class1 certificates for any subdomain

Posted by jpluimers on 2015/11/20

Thanks Craine for answering:

StartSSL does in fact offer free SSL certs for subdomains, though they are Class 1 certificates.

It works: just start the process for the domain, then when you get to the step for entering a subdomain, enter any one (of course www works, but you can do the process multiple times so register certificates for multiple subdomains).


via: tls – Free second-level domain SSL certificate – Information Security Stack Exchange

Posted in *nix, *nix-tools, Apache2, https, Power User, Security | Leave a Comment »

The Power of Open Source… Microsoft .NET and OpenShift: .Net on Linux

Posted by jpluimers on 2015/11/11

Really exiting times ahead: Microsoft .Net on Linux.

It’s not fully ready yet, but to get an idea to learn more about running OpenShift Enterprise 3 and a .NET application based on a Red Hat Enterprise Linux container, here are a few links to get started:

I wish that the demo repository at and the domain were accessible (:

There are other alternatives too, but OpenShift (RedHat) and Microsoft working together is really exiting news to me.

If you’re on other distros, here are some more links:

And of course there has been Mono for a while, which is a different implementation of .NET:

Hopefully this will have search results soon: dnvm opensuse tumbleweed.


Posted in *nix, .NET, Development, Linux, OpenShift, openSuSE, Power User, RedHat, Software Development, SuSE Linux, Tumbleweed | Leave a Comment »

7 Linux Grep OR, Grep AND, Grep NOT Operator Examples

Posted by jpluimers on 2015/10/31

Question: Can you explain how to use OR, AND and NOT operators in Unix grep command with some examples?

Source: 7 Linux Grep OR, Grep AND, Grep NOT Operator Examples

Posted in *nix, *nix-tools, Power User, RegEx | Leave a Comment »


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