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Typing vagrant from the command line will display a list of all available commands.

Be sure that you are in the same directory as the Vagrantfile when running these commands!

Creating a VM

• vagrant init -- Initialize Vagrant with a Vagrantfile and ./.vagrant directory, using no specified base image. Before you can do vagrant up, you'll need to specify a base image in the Vagrantfile.
• vagrant init <boxpath> -- Initialize Vagrant with a specific box. To find a box, go to the public Vagrant box catalog. When you find one you like, just replace it's name with boxpath. For example, vagrant init ubuntu/trusty64.

Starting a VM

• vagrant up -- starts vagrant environment (also provisions only on the FIRST vagrant up)

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README

This is an example of a socket-activated per-connection service (which is usually referred to as inetd-like service). A thorough explanation can be found at http://0pointer.de/blog/projects/inetd.html.

Define a socket unit

The key point here is to specify Accept=yes, which will make the socket accept connections (behaving like inetd) and pass only the resulting connection socket to the service handler.

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LPI-1 102 Notices

Topic 105: Shells, Scripting and Data Management

• 105.1 Customize and use the shell environment - 4
• 105.2 Customize or write simple scripts - 4
• 105.3 SQL data management - 2

Topic 106: User Interfaces and Desktops

• 106.1 Install and configure X11 - 2
• 106.2 Setup a display manager - 1
• 106.3 Accessibility - 1

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Docker

Configuration

• docker pull, images are stored not installed in /var/lib/docker

Links:

• Docker - Docs
• Docker - Compose
• Docker - Registry

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LPI Essentials Notices

• Managing Users and Groups
• Managing File Ownership and Permissions
• Archiving Files
• Managing Linux Processes and Log Files
• Connecting Linux to a Network

8 Managing Users and Groups

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Git - Cheatsheet

Global Settings

Related Setup: https://gist.github.com/hofmannsven/6814278

Related Pro Tips: https://ochronus.com/git-tips-from-the-trenches/

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Ansible - Cheatsheet

ansible-galaxy

Playbook template init with ansible-galaxy

ansible-galaxy init roles/myrole

ansible-playbook

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Moved to git repository: https://github.com/denji/nginx-tuning

NGINX Tuning For Best Performance

For this configuration you can use web server you like, i decided, because i work mostly with it to use nginx.

Generally, properly configured nginx can handle up to 400K to 500K requests per second (clustered), most what i saw is 50K to 80K (non-clustered) requests per second and 30% CPU load, course, this was 2 x Intel Xeon with HyperThreading enabled, but it can work without problem on slower machines.

You must understand that this config is used in testing environment and not in production so you will need to find a way to implement most of those features best possible for your servers.

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Creating a .deb Package

This creates a package which runs an install.sh which copies a file somewhere the below is entirely incorrect. Hopefully I'll get around to fixing it tip: this would install to the root dir & the relative path to ./install.sh would be wrong

go to project directory

cd /path/to/project

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docker build -t friendlyname .  # Create image using this directory's Dockerfile
docker run -p 4000:80 friendlyname  # Run "friendlyname" mapping port 4000 to 80
docker run -d -p 4000:80 friendlyname         # Same thing, but in detached mode
docker exec -it [container-id] bash                  # Enter a running container
docker ps                                 # See a list of all running containers
docker stop <hash>                     # Gracefully stop the specified container
docker ps -a           # See a list of all containers, even the ones not running
docker kill <hash>                   # Force shutdown of the specified container
docker rm <hash>              # Remove the specified container from this machine
docker rm $(docker ps -a -q)           # Remove all containers from this machine