Package: rxvt-unicode-256color

"rxvt-unicode-256color" package binaries on CentOS:

/usr/bin/urxvt256cc /usr/bin/urxvt256c /usr/bin/urxvt256cd

You may install this package on CentOS with yum install rxvt-unicode-256color

"rxvt-unicode-256color" package binaries on Debian:

/usr/bin/rxvt-unicode /usr/bin/urxvtcd /usr/bin/urxvtc /usr/bin/urxvtd /usr/bin/urxvt

You may install this package on Debian with apt-get install rxvt-unicode-256color