DualShield Computer Logon Client for Linux can be upgraded in place on top of the old version.
Upgrade Logon Client on CentOS / Fedora
Download the install file dshield-client-service-x.y.z-x86_64.rpm, and execute the command below to upgrade it (whereas x.y.z is the version and build number, e.g. 1.1.0)
$ sudo rpm -Uvh dshield-client-service-1.1.0-x86_64.rpm
Upgrade Logon Client on Ubunto
Download the install file dshield-client-service-x.y.z-x86_64.deb, and execute the command below to upgrade it
$ sudo dpkg -i dshield-client-service-1.1.0-x86_64.deb