Package: efax

"efax" package binaries on CentOS:

/usr/bin/efax /usr/bin/efix /usr/bin/fax

You may install this package on CentOS with yum install efax

"efax" package binaries on Debian:

/usr/bin/efax /usr/bin/efix /usr/bin/fax

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