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Tag: Linux

Ubuntu: Apache is not serving files from the “javascript” directory
  • Linux

Ubuntu: Apache is not serving files from the “javascript” directory

  • Posted on 2020-12-302021-01-19
  • by dulare

This strange issue occurred today on one of the new servers I prepared. I moved the test website from my client’s machine and I was testing it to check what…

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Testing SD card capacity and speed – in Linux
  • Tips

Testing SD card capacity and speed – in Linux

  • Posted on 2020-09-162020-10-07
  • by dulare

SD cards are getting cheaper and cheaper. They are also growing larger and larger. Unfortunately, it also causes some sellers to sell fake SD cards – they are introduced as…

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[UFW BLOCK] messages in syslog – how to get rid of them?
  • Linux

[UFW BLOCK] messages in syslog – how to get rid of them?

  • Posted on 2020-08-052020-09-09
  • by dulare

The UFW – Uncomplicated Firewall gets more and more popular. It is good because the better the servers are secured, the better is the security in general. However, UFW users…

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Bash tips – batch file processing
  • Linux

Bash tips – batch file processing

  • Posted on 2020-04-292020-04-29
  • by dulare

Since some of our servers are running Linux, it is common that we are writing bash scripts (or shell scripts in general) to perform various actions. In this article, I…

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Batch resize photos using ImageMagick
  • Linux

Batch resize photos using ImageMagick

  • Posted on 2020-01-162020-01-16
  • by dulare

This will be a quick one. I tend to forget the method of batch photo resize using ImageMagick in Linux. In some cases I need to resize all files in…

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APT upgrade without configuration related prompts
  • AWS

APT upgrade without configuration related prompts

  • Posted on 2020-01-082020-01-08
  • by dulare

Since a lot of our clients use small Amazon EC2 instances to host their websites, we have to deal with the Linux updates regularly. Also, the goal is to spend…

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Python virtual environment in three easy steps
  • Linux

Python virtual environment in three easy steps

  • Posted on 2019-12-112019-12-14
  • by dulare

I know that the title is rather a clickbait. It should be. If you are not using virtual environments for Python, you should start. This is really easy and can…

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Working remotely on Jupyter Notebook
  • Linux

Working remotely on Jupyter Notebook

  • Posted on 2019-11-262019-11-26
  • by dulare

I’m just about to host the small Machine Learning workshop. I don’t want attendants to install Anaconda and use Jupyter Notebooks on their computers. I simply want to run Jupyter…

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Apache logs – useful oneliners
  • Linux

Apache logs – useful oneliners

  • Posted on 2019-06-042019-12-24
  • by dulare

From time to time I have a need to analyze Apache access logs real quick. In most cases, website owners are noticing some strange activity or unusual traffic peak and…

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OpenVPN failed to start – Ubuntu / LXD issue
  • Linux

OpenVPN failed to start – Ubuntu / LXD issue

  • Posted on 2018-12-132019-12-24
  • by dulare

Recently I noticed that one of my OpenVPN servers stopped working. It was just after the update on the Ubuntu 16.04.4 LTS. What I found was that the service failed…

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