# OS

Tips related to exploitation systems

## Install iso

### Ubuntu or debian

Use `startup disk creator` under ubuntu.

### Command line

Check what is you USB drive with `lsblk`

Unmount with `sudo umount /dev/sdb1`

Install iso with

```sh
sudo dd bs=4M if=dsl-4.4.10.iso of=/dev/sdb status=progress oflag=sync
```

## Ubuntu

Tips to set Ubuntu desktop.

### Change default terminal to Xfce terminal

Install xfce terminal with **Ubuntu software**.

Use the command : `sudo update-alternatives --config x-terminal-emulator`

### Game save folder for Gog games

FTL and Into the Breach saves are in `.local/share/` folder.

## Grub

`sudo update-grub`

## Install dynamic library

Tested with [box2d](https://github.com/erincatto/box2d).

### Install includes

Header files (`*.h`) must rely in a include folder, like `/usr/local/include/`. You can group headers in folders, but you have to take folders into account for preprocessing :

On your file system :

```
include
|—— hello.h
\—— box2d
	|── b2_world.h
	\—— box2d.h
```

In C++ :

```
#include <hello.h>
#include <box2d/box2d.h>
```

### Library

Compiled files (`*.a` or `*.so`, commonly generated through a buil system like `make` or `cmake`), must rely in a linked folder, like `/usr/local/lib`.

### Linking

If your static lib is named `libhello.a`, you link with the compiler flag `-lhello`.

For instance, `libbox2d.a` is linked with the flag `-lbox2d`.