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It seems ACLs are more and more used by applications running on Debian rsp RaspberryOS. Unfortunately rsync does complain about ACLs with RC23 when files with ACLs are copied with rsync onto a nfs mounted partition. Today I detected it's possible but you have to use an important option when you mount a partition via nfs.
Read more: How to backup ACLs with rsync on a nfs mounted partition?
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Some SQL DBMs allow to create recursive queries. That's a feature of DB2 (free download ), SQL Server and Oracle. Unfortunately mySQL misses this feature. But every recursive algorithm can be written in a non recursive way - so it's not clear whether this is a need or just a nice DBMS feature. Anyhow - it's an interesting topic.
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SSDs are available for some time now. I had to replace my good old desktop with a newer one because the motherboard started to fail intermittently. I decided to include a 120GB SSD in my new system and spent some time to find out what I have to do in order to increase the lifetime of my SSD. SSDs deliver data very fast on read. On write it takes longer and unfortunately the number of writes is limited. That's why the number or writes to the SSD should be reduced as far as it is possible. On the following pages I describe in detail which changes I did on my Linux Mint 13 and they should also apply on other Linux distributions.
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The german computer magazin c't periodical No 5 from 2/20/2016 has multiple interesting articles about docker and how to create a wordpress installation very fast. The following article explains how to install docker on Linux Mint 17.1 and summarizes the commands explained in c't about docker and how to setup a local wordpress via docker. Additional commands about docker are also explained in addition how to create your own nginx docker image. Other articles in the computer magazin explain in detail the way docker works and how to orchestrate containers.
Read more: Docker in 5 minutes by example with a Wordpress- and MySQL-Installation