# Lab 3. System and Network administartion
## Mustafin Timur

# Creating repo and package
## Prepare source code

I'll publish small "Hello world" written in C++

#include <iostream>
int main() {
using namespace std;
cout << "Hello world\n";
}
Save

Compile it with:

g++ mustafin.cc -o mustafin

## Create the package

mkdir -p mustafin/DEBIAN

Than create `mustafin/DEBIAN/control` with such a content:

Package: mustafin
Version: 1.0
Section: custom
Priority: optional
Architecture: all
Essential: no
Installed-Size: 1024
Maintainer: [e-mail]
Description: Just a lab

Copy binary to the target folder

mkdir -p mustafin/usr/bin/
cp mustafin mustafin/usr/bin/

Build package

dpkg-deb --build mustafin
mv mustafin.deb mustafin-1.0_amd64.deb

## Setup repository

After apache installation

cp mustafin-1.0_amd64.deb /var/www/html/debian/

Create list of packages

dpkg-scanpackages . | gzip -c9 > Packages.gz

Add repo to the list of repos

echo "deb [trusted=yes] http://10.0.2.15/debian ./" | tee -a /etc/apt/sources.list > /dev/null

Update list of the packages

sudo apt-get update

Install package

sudo apt-get install mustafin



# Questions

## Task 1

Study that packaging system and answer the following questions:
• how does it work?

Packaging systems contains indexes of packages available for installation. The list goes from list of repos (may be mirrors).

• how does it deal with dependencies?

For example, Debian have different level of dependecies as "Depends" — dependencies will be installed during installation or should be already installed, or "Conflicts" — this packages must be removed to install this package. Everything installed globally

• does it use the GNU build tools? How?

Since it can build package from source using `apt-get source --compile` therefore it may use them during compilation of the target package.

• if not what does it use?

build-dependecies of the package