Package: mercurial

"mercurial" package binaries on CentOS:

/usr/bin/git-rev-tree /usr/bin/hg /usr/bin/hg-ssh /usr/bin/hg-viz /usr/bin/mercurial-convert-repo

You may install this package on CentOS with yum install mercurial

"mercurial" package binaries on Debian:

/usr/bin/hg

You may install this package on Debian with apt-get install mercurial