linux network tool

iperf -- if performance tool
iftop -- if usage
nethogs -- network usage by process

rpm relocate

rpm -qpl package.rpm
rpm --relocate "/usr/local/"="/usr/src/test/" package.rpm

rpm src

rpmbuild -bb /usr/src/redhat/SPEC/xxx.spec
rpmbuild -bp /usr/src/redhat/SPEC/xxx.spec