Rabin.IO Blog

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Upgrading Fedora Installation on DigitalOcean

I found this method works for me, #Check if user is root if [[ $EUID -ne 0 ]]; then echo “Sudo privileges required!” exit 1; fi dnf update NEXT_VERSION=25 rpm –import /etc/pki/rpm-gpg/RPM-GPG-KEY-fedora-${NEXT_VERSION}-$(uname -i) dnf...

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ZSH Home / End Keys

Self note, Add this lines to ~/.zshrc bindkey ‘\e[1~’ beginning-of-line # Linux console bindkey ‘\e[H’ beginning-of-line # xterm bindkey ‘\eOH’ beginning-of-line # gnome-terminal bindkey ‘\e[2~’ overwrite-mode # Linux console, xterm, gnome-terminal bindkey ‘\e[3~’ delete-char...

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Matching non ASCII characters in NGiNX location

If you need to match a non ASCII string with NGiNX, and don’t want to use the encoded URL, you can use this trick, location ~* (*UTF8)^/אודות$ { return 301 “https://blog.rabin.io/about-me”; } Resources http://stackoverflow.com/questions/28055909/does-nginx-support-raw-unicode-in-paths...

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Visualize real-time data streams with Gnuplot

Some times when I need to troubleshoot a problem, adding some visualization to the process can help a lot, especially if one need to correlate between 2 (or more) metrics in the data. But...

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Run Command Before Starting SSH Connection

This a quick hack I found while I was looking to run a knock script before connecting to servers which I have the SSH service protected with a knock sequence. In my setup I...

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[PHP] Validate Email Address Format

A quick snippet I use to validate email address format. <?php if (empty($argv[1])) { echo ‘usage: ‘ . $argv[0] . ‘ [email protected]’ . PHP_EOL; exit (1); } array_shift($argv); foreach ($argv as $key => $email)...