When upgrading to a new version of PGP Command Line, in most cases you can install the new version without uninstalling the older version of PGP Command Line. During installation, the new version of PGP Command Line will overwrite or update any older version files. See the installation steps in the following articles for more information on installation requirements.
For more information on installing PGP Command Line, see the following links for articles for your operating system:
180186 - Installing PGP Command line on AIX
180187 - Installing PGP Command line on HP-UX
180188 - Installing PGP Command line on Max OS
180189 - Installing or Upgrading PGP Command line on Red Hat Enterprise or Fedora Core
180192 - Installing PGP Command line on Oracle Solaris
180191 - Installing PGP Command line on Windows