Do you want a good starter cloud init config?
Here is an example:
#cloud-config users: - name: user groups: users, admin sudo: ALL=(ALL) NOPASSWD:ALL shell: /bin/bash ssh_authorized_keys: - <update with public ssh key> chpasswd: list: | root:<secure-password-here> expire: False packages: - fail2ban - ufw package_update: true package_upgrade: true runcmd: - printf "[sshd]\nenabled = true\nbanaction = iptables-multiport" > /etc/fail2ban/jail.local - systemctl enable fail2ban - ufw default deny incoming - ufw default allow outgoing - ufw allow 2022/tcp - ufw enable - sed -i -e '/^\(#\|\)PermitRootLogin/s/^....
Do you ever want to run a CLI before your main app in Docker? Here is a complicated way to do just that.
We need a folder named success_flag that will contain a flag for the main app to know when the cli has finished running.
First, we delete any existing success flag that remains:
base: build: . container_name: base volumes: - ./success_flag:/success_flag command: bash -c "rm -f /success_flag/cli_success" restart: "no" Second, let’s run the database layer, in this case Postgres (but it can be any database engine)....
Introduction Do you ever want to get a notification with the number of updates required when logging into XFCE in debian/ubuntu like systems ?
There is a simple python script that can do just that.
It uses notify-send command and paired with the magic command that returns the update count, we get the next python script:
#!/usr/bin/env python3 import os import subprocess # Run the apt-get command and grep the output command = 'apt-get --simulate upgrade | grep "upgraded....
Introduction Do you need a certain environment variable at build time in Docker as opposed to runtime?
There is an easy way to achieve this.
Use Docker build arguments in combination with environment variables.
An example of this is below of a React JS docker build that needs the environment variable REACT_APP_BACKEND_API and build time in the command npm run build.
# Declare the build argument in the global scope ARG REACT_APP_BACKEND_API_ARG=TEST # Use an official Node runtime as a parent image FROM node:20-alpine # Set the working directory WORKDIR /app # Copy package....
Introduction Did you ever wanted to program go in AIX ? Now you can.
Installing GoLang on AIX First, add /opt/freeware/bin to the beginning of the current PATH. For example:
export PATH=/opt/freeware/bin:$PATH Next install Go on AIX (and increase /opt and /var sizes if needed):
chfs -a size=+512M /opt chfs -a size=+260M /var dnf install golang Create a sample program Next, let’s create a sample Go Hello World program:
package main import "fmt" func main() { fmt....