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Crashing your kernel on purpose

by Renich
2016-02-15 22:20:14 +0000

Ok, that sounds funny, doesn’t it? Well, it turns out, sometimes, you want to test your kernel dump or something of the sorts. Here’s how to do it: echo c > /proc/sysrq-trigger This will, instanly, crash your kernel.

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HowTo: Ask questions in Bash?

by Renich
2015-12-29 19:11:30 +0000

I’ve been writing some script to configure some firewall and came up with this way of asking a question in Bash. I hope it helps as an example. Feel free to contribute your own: #!/usr/bin/env bash ask() { local query=$1 if ( echo $query | grep -qi password ); then read -s -p "$query: " […]

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HowTo: Generate free SSL certificates for Nginx/Tengine with LetsEncrypt

by Renich
2015-12-12 01:26:09 +0000

OK, it’s fairly easy to get this done on a distro like Funtoo/Gentoo or Fedora, which are the distros I use. First of all, you need to install this thing on your server: # Fedora su - dnf -y install letsencrypt # Funtoo/Gentoo su - mkdir src && cd src git clone https://github.com/letsencrypt/letsencrypt cd letsencrypt […]

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