using certbot to add ssl to your site
First install it with: dnf install certbot python3-certbot-apache
Victor Elgersma
some useful grep commands
Search for all instances of ‘a minimal’ recursively, starting from the current directory. grep -ri 'a minimal' .
a collection of env vars
$ echo $OSTYPE darwin24.0
Writing to a file in ruby
filename = File.join(__dir__, "example.txt") test_string = "Hello world" File.open(filename, "w") do |f| f.write(test_string) end Often we want to append to a file instead (like a logfile): ...
Ruby Environment Variables
Read the $PATH environment variable in ruby: puts ENV["PATH"]
PHP Superglobals
A collection of useful superglobals # location of website inside our computer echo $_SERVER["DOCUMENT_ROOT"]; echo "<br>"; echo $_SERVER["PHP_SELF"]; # i.e index.php echo "<br>"; echo ...
php resources
Learn X in Y Minutes - PHP https://learnxinyminutes.com/php/ PHP the Right Way https://phptherightway.com/
html escaping in PHP
Use htmlspecialchars() for this: php > echo htmlspecialchars("<script>"); <script> This will prevent (most) XSS attacks.
SSH'ing into a server
Use the ssh command and pass in your public key, as well as the IP address of the machine you want to log in to. ssh -i ~/.ssh/id_ed25519_hetzner root@$MY_SERVER_IP_ADDRESS If it’s your first ti...
Finding files with linux
Use the find command: find . -name "about" However, the above command won’t match “about.md”. To match about* we need to use a wildcard find . -name "about*"