Author Archives: Ahmed Tawfik

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About Ahmed Tawfik

Cybersecurity Professional, Systems Engineer, OSS & Linux Geek

Compress PDF Files Effectively in Ubuntu

Posted on October 27, 2016 by Ahmed Tawfik

Found a great script that does an amazing job with compressing PDF files whilst maintaining a good quality: Get the script from here: http://www.alfredklomp.com/programming/shrinkpdf/ Just copy the script to a text file and make it executable, then run: ./shrinkpdf infile.pdf outfile.pdf … Continue reading →

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How to solve Google Chrome Flickering on Ubuntu 16.04

Posted on October 23, 2016 by Ahmed Tawfik

Just do the following two steps: sudo nano /usr/share/applications/google-chrome.desktop Scroll down to the “Exec” line Add two additional parameters, so that it looks like this: Exec=/usr/bin/google-chrome-stable –disable-gpu-driver-bug-workarounds –enable-native-gpu-memory-buffers %U That’s it, now restart Chrome and it shall work perfectly! I … Continue reading →

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Fixing DNS Issues with Linux Mint 18

Posted on September 27, 2016 by Ahmed Tawfik

A problem that has been bugging me for a while on my Linux Mint 18, that the DNS is not working properly and on a random basis. What I could fix it with is that I just did the following: … Continue reading →

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Create/Modify LVM Physical Volumes, Volume Groups and Logical Volumes on Ubuntu 16.04

Posted on September 24, 2016 by Ahmed Tawfik

It’s pretty straight-forward, but before you start, you need to check for block devices that can be used to create physical volumes: sudo lvmdiskscan You will see a result that looks like this: /dev/ram0 [ 64.00 MiB] /dev/sda [ 50.00 … Continue reading →

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How to allow non-root user to capture packets with Wireshark on Ubuntu 16.04

Posted on August 28, 2016 by Ahmed Tawfik

Only two steps you need to do: “sudo dpkg-reconfigure wireshark-common” (choose yes to allow Dumpcap to make the wireshark group members able to capture packets) “sudo adduser USERNAME wireshark” to add your user to the wireshark group Then you just need … Continue reading →

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