On Tue, 15 Oct 2013 06:53:17 -0700 (PDT)
shlo.af...@gmail.com wrote:

> All the git repositories are on one git server in specific directory.
> I would like to know what I need to backup in order to be able to
> make a success restore, in case my  disk  on the git server will
> crushed.
> I would like to understand, after the user run on his local
> workstation 'git init / add / commit / push'  all the information was
> copied to the git server and the local directory in the local
> workstation can be removed? 

Depends on how you define "all the information": contrary to
centralized systems, in Git, pushing is a voluntary act -- just like
sharing, -- where the one who shares decides what they want to share.
In the case of Git, a developer chooses which bits of their local
commit graphs to send, and which objects to update with them.

* If you have recorded 10 commits on top of your local branch "X" which
  tracks a remote branch, you're not required to update the branch being
  tracked with all those 10 commits -- you might send, say, just the
  first three of them.
* Tags are not pushed unless `git push` is explicitly told to do that,
  and the tags to send are specified.  Notes are not sent as well.
* New local branches are not pushed unless `git push` is told to do so.

On the other hand, what's sent, is sent completely and with all the
dependent objects, so if someone pushes a commit into the repository,
you can be sure everything this commit references in the repository it
has been created in, is also sent.

Note that what I have just described -- the freedom of the owner of
a local repository in what they share -- is just a property of a DVCS
you have to live with.  But what ends up in your centralized ("shared")
repository is self-consistent, and you can safely back it up.

What's pushed when a developer simply runs `git push` or
`git push <remote>` in their repository is another story completely as
it depends on a number of details.  If you're interested about this, ask

> I can see  somehow the name of the files and their content in the git 
> repository that saved on the git server?

Yes: the regular Git commands for inspecting the commit graphs work in
bare repositories just as well as they do in "normal" ones.

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