If your linux box doesn’t comes with YUM in default installation here is the step to follow on how to install YUM using rpm on CentOS 5.3 version
1. Check the OS version
1. Run the scripts on bash shell
#cat > install_yum.sh
for file in \
gmp-4.1.4-10.el5.i386.rpm \
readline-5.1-1.1.i386.rpm \
expat-1.95.8-8.2.1.i386.rpm \
python-elementtree-1.2.6-5.i386.rpm \
sqlite-3.3.6-2.i386.rpm \
elfutils-libs-0.137-3.el5.i386.rpm \
yum-fastestmirror-1.1.16-13.el5.centos.noarch.rpm \
python-sqlite-1.1.7-1.2.1.i386.rpm \
python-2.4.3-24.el5.i386.rpm \
libxml2-2.6.26-2.1.2.7.i386.rpm \
libxml2-python-2.6.26-2.1.2.7.i386.rpm \
python-sqlite-1.1.7-1.2.1.i386.rpm \
elfutils-0.137-3.el5.i386.rpm \
rpm-python-4.4.2.3-9.el5.i386.rpm \
m2crypto-0.16-6.el5.3.i386.rpm \
python-urlgrabber-3.1.0-5.el5.noarch.rpm \
yum-3.2.19-18.el5.centos.noarch.rpm
do rpm -Uvh http://mirror.centos.org/centos-5/5.3/os/i386/CentOS/$file;
done
Press Ctl+D
2. #chmod 755 install_yum.sh
3 ./install_yum.sh
4. You can change the mirror URL to any local/ network mirror if you are using.
5. Use yum check-update command to update the package header list
6. Run Yum list to completely verify the installation.
Hope it will work for you.
r3team