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+====== Git: create your own git server, but sharing access to all the repositories ======
+===== Intro =====
+This turorial will show how to create a remote git server but
+every user you give permissions can contribute to every
+git project in the server.
+To create a git server in which every project can see only the
+projects they have assigned, I suppose there are other solutions,
+but definitely this solution will not work, because in this
+tutorial every commit will be made by a generic git user that
+can read and write in every directory.
+===== Set up a git server =====
+First, install git on your machine. In my case, because it's an
+ubuntu, I've run:
+<code>
+sudo apt-get install git
+</code>
+===== Create git user =====
+I prefer to create a "normal" **git** user instead a system one.
+If you prefer to create a system user, just add the **--system**
+option to the command:
+The **--create-home** option is needed because there we will be
+storing the public keys of the users of the repository.
+<code>
+useradd --create-home --user-group git
+</code>
+===== Enter as git user and add remote public keys =====
+<code>
+~$ mkdir .ssh
+~$ chmod o=,g= .ssh
+~$ cd .ssh
+~/.ssh$ touch authorized_keys
+~/.ssh$ chmod o=,g= authorized_keys
+</code>
+===== Add the keys of the different users of the git repository =====
+<code>
+~$ cat public_key_of_first_user.pub >> .ssh/authorized_keys
+~$ rm public_key_of_first_user.pub # you can remove the public key afterwards if you want
+</code>
+===== Verification: in the first_user computer check that you can log in as git user to the remote computer =====
+Check that you can make a ssh to the remote computer with no password request:
+<code>
+rluna@asustao:~$ ssh git@192.168.0.21
+The authenticity of host '192.168.0.21 (192.168.0.21)' can't be established.
+ED25519 key fingerprint is SHA256:PvSiThCnDq8pNOXyVgsq5vsXLME6oYIbCs0v5urvcpE.
+This key is not known by any other names
+Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
+Warning: Permanently added '192.168.0.21' (ED25519) to the list of known hosts.
+The programs included with the Ubuntu system are free software;
+the exact distribution terms for each program are described in the
+individual files in /usr/share/doc/*/copyright.
+Ubuntu comes with ABSOLUTELY NO WARRANTY, to the extent permitted by
+applicable law.
+git@ubuntu2004:~$
+</code>
+If this is step succeeds, you can continue.
+==== Create a directory for your repositories ====
+In the server computer, I've created a ```/var/git``` directory
+to hold the repositories.
+As root, do the following:
+<code>
+# mkdir /var/git
+# chown git:git /var/git
+# chmod g=rx,o= /var/git
+</code>
+The permissions are set 750 to allow the git user to do
+anything inside the directory, and the group members to
+allow other users to read the contents: this will allow
+us to create other users that can read this directory
+by adding them to the group of the git user.
+==== Create a repository ====
+To create a repository, log in as the git user and make
+a git init --bare:
+<code>
+git$ cd /var/git
+git$ mkdir repo1.git
+git$ cd repo1.git
+git$ git init --bare
+</code>
+Congrats! you have created your first repository.
+The .git extension of the directory is not needed, is
+just to make the url of the repository more cool.