Package: arj

"arj" package binaries on CentOS:

/usr/bin/arj /usr/bin/arjdisp /usr/bin/rearj /usr/bin/unarj

You may install this package on CentOS with yum install arj

"arj" package binaries on Debian:

/usr/bin/arj /usr/bin/arjdisp /usr/bin/arj-register /usr/bin/rearj

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