Administration des Systèmes d'Exploitation

The objective of this TP is to deploy collaborative tools with their basic configuration on the server side and test them on the client side. We want to demonstrate the possibility of installing those tools without going too much into detailed configuration. It is not required to write bash scripts for this lab.

• Having 2 virtual machines with network, nfs, and nis configured

Basic ssh configuration:

• Server: the package open-ssh has been installed on the VM
• Server: create an user client01
• Server: Verify the status of ssh server: sudo systemctl status ssh
• Server: Allow ssh connections through the firewall: sudo ufw allow ssh
• Client: On a client machine, connect to the server using: ssh client01@server

Configure ssh authentication by public/private key:

• Client: create a new authentication key pair for SSH: ssh-keygen. Use the default locations to store the keys
• Client: copy the newly generated public key to the server: ssh-copy-id -i ~/.ssh/id_rsa.pub client01@server. This command appends the public key of the client to the file /home/client01/.ssh/authorized_keys on the server.
• Client: connect to the server using ssh client01@server.

• The git package has been installed on the VM
• Create a dedicated git user sudo adduser --disabled-password git
• Switch to the user and add the public keys of any users you want to access to your git server
  • sudo su git
  • cd
  • mkdir ~/.ssh
  • chmod 700 ~/.ssh
  • touch ~/.ssh/authorized_keys
  • chmod 600 ~/.ssh/authorized_keys
  • Open ~/.ssh/authorized_keys with a text editor and add the public key of users
• Create a a git repository
  • Because we need sudo access in to create directories and configure permissions, commands are executed by using the m1ase user but not the git user
  • Move to the git user's home directory: cd /home/git
  • Create the git repo directory: sudo mkdir m1aserepo.git
  • Init the git repo:

        cd m1aserepo.git  
        sudo git init --bare 
        cd ..

  • Change the ownership of the directories and files to git: sudo chown -R git.git m1aserepo.git/
• On a client machine, clone a new repo which was initialized the git server: git clone git@[IPADDRESS]:[repo-name] ~/git/
• You can use this setup to practice some examples with git. There is a lot of helpful documentations and tutorials online. (For example: https://www.w3schools.com/git/)

• The package apache2 has been installed on the VM
• Allow web traffic on port 80: sudo ufw allow 'Apache'
• Verify the firewall status: sudo ufw status
• Check the status of your web server: sudo systemctl status apache2
• On a VM client, open a web browser and go to the page web with address IP: 192.168.56.101. We should see the default apache page web on the server
• The page web on the server is located at : /var/www/html. You can modify and deploy your own website here.