Package: httrack

"httrack" package binaries on CentOS:

/usr/bin/htsserver /usr/bin/httrack /usr/bin/proxytrack /usr/bin/webhttrack

You may install this package on CentOS with yum install httrack

"httrack" package binaries on Debian:

/usr/bin/httrack

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