Author Archives: Ahmed Tawfik

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About Ahmed Tawfik

Cybersecurity Professional, Systems Engineer, OSS & Linux Geek

Flush the DNS cache on Ubuntu 18.04

Posted on October 18, 2018 by Ahmed Tawfik

sudo systemd-resolve –flush-caches Source: https://askubuntu.com/questions/906476/how-can-i-flush-the-dns-on-ubuntu-17-04

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How to check packages support status for Ubuntu 18.04

Posted on October 18, 2018 by Ahmed Tawfik

To know which packages are supported and which are not, for how long and whether the community or canonical are the ones who support it, just run: ubuntu-support-status It will give you this sample output: Support status summary of ‘$HOSTNAME’: … Continue reading →

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Create SSH profiles for your frequent connections on Ubuntu 18.04 using ssh_config

Posted on October 17, 2018 by Ahmed Tawfik

This is very useful if you connect to tons of servers via ssh and you need to keep record of them as profiles. Edit/Create a file .ssh/config Add entries in this manner: Host blabla User blablabla # or domain\blablabla if … Continue reading →

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Start Slack Minimized on Ubuntu 18.04

Posted on October 9, 2018 by Ahmed Tawfik

It might seem silly, but I just hate having to see the Slack Connection window every time I start my computer. I just wanted it to start minimized, no big deal! To start it minimized, just append -u to the … Continue reading →

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Add a custom resolution to your display using xrandr on Ubuntu 18.04

Posted on September 30, 2018 by Ahmed Tawfik

Just in case your monitor’s supported resolution is not properly detected or if you want a custom resolution to be used: In this example, we will try to add 1368×768, with a refresh rate of 60 Run cvt to get … Continue reading →

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