The Gjallar file tree is now hosted in a Mercurial repository at http://hg.krampe.se.
apt-get install mercurial as root.
Using this repository you can commit local changesets etc, but in order to push these changesets up to http://hg.krampe.se you need write access, see below.
Note though that we use Monticello for the actual Squeak code! Mercurial is only used for the external file tree and thus most developers never need to actually use/learn Mercurial.
In order to gain write access to our Monticello repository you need to ask Göran Krampe for a password, by for example posting to the Mailinglist.
...which creates file id_dsa.pub, and then you email it to Göran Krampe so that he can add it to the server.
The last line enables compression for SSH.
...or just use the clone you checked out earlier, no need to create another one, and push changesets using ssh.