TomCan

# install systemd-timesyncd
apt-get install systemd-timesyncd

# configure NTP server, or keep defaults
nano /etc/systemd/timesyncd.conf
# restart daemon
systemctl restart systemd-timesyncd

# check service status
systemctl status systemd-timesyncd

TomCan

<?php

function encodeMPINT($binary)
{
    // If the most significant bit is set, prepend a zero byte to make it positive
    if (ord($binary[0]) & 0x80) {
        $binary = "\x00".$binary;
    }

    // Encode the length as a 32-bit big-endian integer

TomCan

#
# Get loglines from /var/log/auth.log containing accepted SSH key hashes.
# Then match that hash with the keys in the users' authorized_keys file.
#
# Caveats:
# - Expects specific format of auth.log, only tested on Debian
# - Expects authorized_keys to be in .ssh/authorized_keys in user homefolder
# - Uses eval to get home folder (potentially insecure)
#
while read -r D1 D2 D3 U K; do

TomCan

If you find yourself locked in a situation where you can't do anything on a table (not even select) when getting
```ERROR 1709 (HY000): Index column size too large. The maximum column size is 767 bytes.```
then this on is for you.

Cause: Your key field is utf8mb4, which uses 4 bytes per character, and row_format isn't set to Dymanic.
Problem: you can't do anything with the table data (SELECT, UPDATE, DELETE,ALTER,DROP,...

Solution:
- stop mysqld and start mysqld in debug mode through (/usr/bin/mysqld-debug)
- connect to mysql, and set debugging options:

TomCan

#!/bin/bash

#
# This will create and setup a MySQL group replication cluster with a given number of members.
# Set the number of members below, and then execute this file. You probably want at least 3 members.
#
# This will create volumes and containers named mysql-X, where X is the number of the member.
# If you currently have volumes with the same name, these might be destroyed!
#
MEMBERS=3

TomCan

# 
# use case: Reverse proxy for system that returns fully-qualified URLS in the content (eg. wsdl file)
#
# Requires: mod_proxy, mod_proxy_http and mod_substitute
#

ProxyPass           /    http://backend-server/Some/API/On/Some/Path/
ProxyPassReverse    /    http://backend-server/Some/API/On/Some/Path/

# Rewrite URLs in wsdl

TomCan

# Apache Rewrite all requests to lowercase URLs
RewriteEngine On
RewriteMap  lc int:tolower
RewriteCond %{REQUEST_URI} [A-Z]
RewriteRule (.*) ${lc:$1} [R=301,L]

TomCan

Foreach ($Site in get-website) { 
	Foreach ($Bind in $Site.bindings.collection) {
		Write-Host $Site.name ":" $Site.state ":" $Bind.Protocol ":" $Bind.BindingInformation
	}
}

TomCan

#!/bin/bash
#
# Check a websocket connection with curl. Pass URL to check as parameter.
# In normal conditions, this should return a 101 (Switching protocol).
#

CODE=$(timeout 3 curl -s --http1.1 \
     --include \
     --no-buffer \
     --header "Connection: Upgrade" \

TomCan

xdg-mime default ssh.desktop x-scheme-handler/ssh
cat << EOF > ~/.local/share/applications/ssh.desktop
[Desktop Entry]
Version=1.0
Name=SSH Launcher
Exec=bash -c '(URL="%U" HOST="\${URL:6}"; ssh \$HOST); bash'
Terminal=true
Type=Application
Icon=utilities-terminal
EOF