Mercurial is not available in yum. Supposedly it can be easily installed if you have the easy_install python tool, but I didn’t have that setup.

Building from source is easy, but requires an extra step:

wget http://mercurial.selenic.com/release/mercurial-1.3.1.tar.gz
tar xzf mercurial-1.3.1.tar.gz
cd mercurial-1.3.1
sudo make install

add to ~/.bash_profile

PYTHONPATH=/usr/local/lib64/python2.4/site-packages:${PYTHONPATH}
export PYTHONPATH