Most of the documentation is a snapshot of the old Namesys site (archive.org, 2007-09-29).
There was also a Reiser4 Wiki (archive.org, 2007-07-06) once on pub.namesys.com.
Reiser4 development appears to have stalled and ReiserFS is deprecated and scheduled to be removed from mainline Linux in 2025.
Reiserfsprogs
From Reiser4 FS Wiki
The tools to maintain a ReiserFS (Reiser v3) filesystem are called reiserfsprogs and can be found on kernel.org.
NOTE: Reiserfsprogs-3.6.21 is the current version and considered stable. This version contains changes made by Jeff Mahoney (everything got testing as a part of latest SuSE distros).
If reiserfsprogs is not already part of your distribution (unlikely, it should be available), you have to build your own:
$ sudo apt-get install uuid-dev $ wget http://www.kernel.org/pub/linux/utils/fs/reiserfs/reiserfsprogs-3.6.21.tar.bz2 $ wget http://www.kernel.org/pub/linux/utils/fs/reiserfs/reiserfsprogs-3.6.21.tar.bz2.sign $ gpg --recv-keys 517D0F0E $ gpg --verify reiserfsprogs-3.6.21.tar.bz2.sign reiserfsprogs-3.6.21.tar.bz2 gpg: Signature made Sat Jan 10 16:15:04 2009 CET using DSA key ID 517D0F0E gpg: Good signature from "Linux Kernel Archives Verification Key <ftpadmin@kernel.org>" $ tar -xjf reiserfsprogs-3.6.21.tar.bz2 $ cd reiserfsprogs-3.6.21 $ ./configure --prefix=/opt/reiserfsprogs && make && sudo make install
