added Podman

README.md

@@ -5,6 +5,7 @@
 2. Software
    - [Cisco Packet Tracer](Software/CiscoPacketTracer.md)
    - [Microsoft M365 Suite](Software/M365.md) (Teams, Word, Excel, ect)
+   - [Nessus](Software/Nessus.md)
    - [PostgreSQL](Software/Postgresql.md)
    - [VirtualBox](Software/VirtualBox.md)
    - [Virtual Machine Manager](Software/VirtualMachineManager.md) (virt-manager)
@@ -13,6 +14,7 @@
 3. Tools
    - [Distrobox](Tools/Distrobox.md)
    - [Flatpak](Tools/Flatpak.md)
+   - [Podman](Tools/Podman.md)
    - [Wine](Tools/Wine.md)
 
 ## Preamble

Software/Nessus.md

@@ -0,0 +1,86 @@
+---
+Classes:
+  - Networking for Cybersecurity
+---
+
+# Nessus
+Nessus is a proprietary vulnerability scanner.
+
+## Download
+Nessus can be downloaded from https://www.tenable.com/downloads/nessus
+
+### Arch-Based
+No need to download from the website, skip to [Install](#install)
+
+### Debian
+Select "**Linux - Debian - amd64**" to download.
+
+### Fedora
+Select "***Linux - Fedora - x86_64**" to download.
+
+### Mint/Ubuntu 
+Select "**Linux - Ubuntu - amd64**" to download.
+
+## Install
+
+### Arch-Based (AUR Package)
+```sh
+yay -S nessus
+```
+
+### Debian
+Replace `<version-number>` with the version number in the file name
+```sh
+sudo dpkg -i ~/Downloads/Nessus-<version number>-debian6_amd64.deb
+```
+
+Note: By default it will be set to start every boot, to disable that run:
+```sh
+sudo systemctl disable nessusd
+```
+You will still be able to run it as normal.
+
+### Fedora
+Replace `<version-number>` with the version number in the file name
+```sh
+sudo dnf install ~/Downloads/Nessus-<version number>-fc38.x86_64.rpm
+```
+
+### Mint/Ubuntu
+Replace `<version-number>` with the version number in the file name
+```sh
+sudo dpkg -i ~/Downloads/Nessus-<version number>-ubuntu_amd64.deb
+```
+
+Note: By default it will be set to start every boot, to disable that run:
+```sh
+sudo systemctl disable nessusd
+```
+You will still be able to run it as normal.
+
+### Podman (Universal)
+Podman is a container system very similar to docker that lets you run programs in an isolated and self-contained environment. Tenable provides a Nessus container that will let you run Nessus on any linux system.
+
+First install [Podman](../Tools/Podman.md) on your computer.
+
+The container image will automatically be downloaded when you run nessus with:
+```sh
+podman run -p 8834:8834 docker.io/tenable/nessus:latest-ubuntu
+```
+
+## Usage
+### Start (Normal)
+```sh
+sudo systemctl start nessusd
+```
+
+### Start (Podman)
+The command in the install section is the same command to run it, simply leave the console window open. If you wish to run it in the background add the `-d` (detach) flag like so:
+```sh
+podman run -d -p 8834:8834 docker.io/tenable/nessus:latest-ubuntu
+```
+
+See the document on [Podman](../Tools/Podman.md) to learn how to control a container running in the background.
+
+### Access
+You should now be able to access it on https://localhost:8834/

Tools/Podman.md

@@ -0,0 +1,76 @@
+# Podman
+Podman is a container system very similar to docker that lets you run programs in an isolated and self-contained environment. A number of programs, usually those with Web Interfaces can be run with podman.
+
+Podman is built to be a drop-in replacement for Docker, so if you see something that can be run with docker, you can usually just replace "docker" with "podman" and it will work. 
+
+Podman has 2 main advantages over Docker:
+1. Due to licensing podman is easier to install on Linux, since it is just packaged as normal software.
+2. Podman is setup to run without root permissions by default, which generally makes it more secure, and means a user does not need root permissions on their system to use it.
+
+## Install
+Podman can be installed by the package manager on your system:
+
+### Arch-Based:
+Select `crun` if asked
+```sh
+sudo pacman -S podman
+```
+
+### Debian/Mint/Ubuntu
+```sh
+sudo apt install podman
+```
+
+### Fedora
+```sh
+sudo dnf install podman
+```
+
+## Run a container
+A container is simply run with the `podman run` command.
+
+For example, to run the simple debian container from the Docker Hub (https://hub.docker.com/_/debian), you would run the following:
+```sh
+podman run docker.io/library/debian:latest
+```
+
+You man want to expose ports from inside the container onto your computer (so the port can be accessed from outside the container), for example if there is a webserver running in that container you could expose port 80 to port 80 on your computer by adding `-p 80:80` like so:
+
+```sh
+podman run -p 80:80 docker.io/library/debian:latest
+```
+
+### DockerFile
+
+More commonly projects will provide a DockerFile, which you can just download, when in the directory with that file just run `podman run` and it will use the information from that file.
+
+### Compose
+You may also see compose files provided for docker projects, for that you will probably need to install the separate `podman-compose` package, and then `podman-compose` can just be used in place of `docker compose` or `docker-compose`. 
+
+For example, being in a directory with a compose file, you can run `podman-compose up` to start the program.
+
+## Manage Containers
+### View running containers
+You can see all running podman containers with 
+```sh
+podman ps
+```
+
+You can additionally view all containers (including stopped) with
+```sh
+podman ps -a
+```
+
+### Stop a container
+After running `podman ps` you can see a container's id, and you can use that id to control it. 
+
+For example you can stop it with
+```sh
+podman stop <id> 
+```
+
+### Delete a container
+You can also delete a stopped container with
+```sh
+podman rm <id>
+```