i was not ignoring package manager actually i was not understanding
plus i didn't had internet connection on my linux system now i am downloading it with package manager ...its taking long time

meanwhile i tried installing using rpm which gave error >>>>>
[root@localhost Desktop]# rpm -ivh gcc-4.5.1-6.fc15.i686.rpm --aid --force
error: Failed dependencies:
binutils >= 2.20.51.0.2-12 is needed by gcc-4.5.1-6.fc15.i686
cloog-ppl >= 0.15 is needed by gcc-4.5.1-6.fc15.i686
cpp = 4.5.1-6.fc15 is needed by gcc-4.5.1-6.fc15.i686
glibc-devel >= 2.2.90-12 is needed by gcc-4.5.1-6.fc15.i686
libc.so.6(GLIBC_2.11) is needed by gcc-4.5.1-6.fc15.i686
libc.so.6(GLIBC_2.7) is needed by gcc-4.5.1-6.fc15.i686
libelf.so.1(ELFUTILS_1.5) is needed by gcc-4.5.1-6.fc15.i686
libgcc >= 4.5.1-6.fc15 is needed by gcc-4.5.1-6.fc15.i686
libgmp.so.3 is needed by gcc-4.5.1-6.fc15.i686
libgomp = 4.5.1-6.fc15 is needed by gcc-4.5.1-6.fc15.i686
libgomp.so.1 is needed by gcc-4.5.1-6.fc15.i686
libmpc.so.2 is needed by gcc-4.5.1-6.fc15.i686
libmpfr.so.4 is needed by gcc-4.5.1-6.fc15.i686
rpmlib(FileDigests) <= 4.6.0-1 is needed by gcc-4.5.1-6.fc15.i686
rpmlib(PayloadIsXz) <= 5.2-1 is needed by gcc-4.5.1-6.fc15.i686


is yum need not to configure if we are connected to internet???

THANKS for support
hopefully after download i will install it easily.

You're trying to install a gcc RPM which is not made for your distribution (it's made for Fedora 15, which has significantly more recent software than RHEL5). If you get yum working, it will download the RPM made for your distribution plus all of the required dependencies and install them for you automatically.

anuja shridhar
as stated in almost all of the above posts DO NOT use a random rpm from the net !!!
Also the rpm you are trying to install IS NOT for RHEL5 . It is for Fedora 15 ALPHA-testing and will NOT work on RHEL

you are using red hat enterprise Linux 5 (RHEL 5 ) so YOU DID buy the REQUIRED license RIGHT!!!!
if not then DO NOT USE RHEL !!!
install CentOS 5.5 instead

if you DO have a valid RHEL license use "yum" to install gcc and all of it's prerequisites ( as stated above - use the "groupinstall" )

Also PLEASE READ -- a MUST-- the red hat RHEL "user guide"
on the red hat web site .
https://access.redhat.com/knowledge/...erprise_Linux/
https://access.redhat.com/support/