Check the version of applications running on Linux

OS version: uname -a cat /etc/redhat-release Apache version: httpd -v /usr/local/apache/bin/httpd -version Jrun version For JRun 3.0, look at logs /opt/jrun/bin/jrun -version Perl /usr/sbin/perl -version (-v works too) Sendmail /usr/lib/sendmail -d0.1 -bt cat /proc/version