Sebastian Storholm sstorholm

## friday.md

      
              1 file
            
          
              22 forks
            
          
                60 comments
              
            
              177 stars
            
          
                yorickdowne
                / friday.md
            
            
              Last active
              December 12, 2025 15:24
            
              
                Debian 13 trixie upgrade
              
          
    Debian 13


Caution Upgrading from Debian 12 to Debian 13 on machines with mdadm has intermittently failed for me; symptom is that
grub EFI is not up to date and system boots into BIOS. Root cause under investigation; it might not be related to mdadm.

To start, read the official release notes.
If your install fits into "vanilla Debian plus maybe a handful of 3rd-party repos", then this guide for a simple upgrade to Debian 13 "trixie" from Debian 12 "bookworm" can be helpful. 3rd-party repos are handled with a find command.
Note upgrade is only supported from Debian 12 to Debian 13. If you are on Debian 11, upgrade to Debian 12 first. Then once on Debian 12, you can upgrade to Debian 13.

  
## bulk-convert.ps1
# Copy this file to any directory containing images & then run this script in powershell
# Get all png images in the current directory & convert it to webp format
$images = Get-ChildItem -Path (Get-Location) -Filter *.png
foreach ($image in $images) {
  $fileName = $image.DirectoryName + "\" + $image.BaseName + ".webp"
  cwebp.exe -q 80 $image.FullName -o $fileName
}

## openssl_commands.md

      
              1 file
            
          
              103 forks
            
          
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              325 stars
            
          
                Hakky54
                / openssl_commands.md
            
            
              Last active
              December 9, 2025 10:34
                — forked from p3t3r67x0/openssl_commands.md
            
              
                OpenSSL Cheat Sheet
              
          
    OpenSSL Cheat Sheet 🔐

Install

Install the OpenSSL on Debian based systems
sudo apt-get install openssl

  
## telnet-rfc-5322-email.sh
$ telnet mail.example.org 25
Trying XXX.XXX.XXX.XXX...
Connected to XXX.XXX.XXX.XXX.
Escape character is '^]'.
220 *********************************
ehlo server.example.org
250-mail.example.com
250-PIPELINING
250-SIZE 20480000
250-ETRN

## 418.conf
server {
    listen       80 default_server;

    location / {
        default_type text/plain;
        return 418 "418 I'm a teapot\n";
    }
}
	# Copy this file to any directory containing images & then run this script in powershell
	# Get all png images in the current directory & convert it to webp format
	$images = Get-ChildItem -Path (Get-Location) -Filter *.png
	foreach ($image in $images) {
	$fileName = $image.DirectoryName + "\" + $image.BaseName + ".webp"
	cwebp.exe -q 80 $image.FullName -o $fileName
	}
	$ telnet mail.example.org 25
	Trying XXX.XXX.XXX.XXX...
	Connected to XXX.XXX.XXX.XXX.
	Escape character is '^]'.
	220 *********************************
	ehlo server.example.org
	250-mail.example.com
	250-PIPELINING
	250-SIZE 20480000
	250-ETRN
	server {
	listen 80 default_server;

	location / {
	default_type text/plain;
	return 418 "418 I'm a teapot\n";
	}
	}