On Tue, May 02, 2017 at 01:59:36PM +0200, Sajjad Hussain wrote: > We need CentOS 5 for a software, and installed CentOS 5.4. But when we try > to install Developments Tools like gcc it gives error that repositories are > not found. > Can you please help us in install gcc on CentOS 5.4? CentOS 5 is no longer supported, so it isn't distributed to the mirros anymore. Also, 5.4 was released in 2009, and even when CentOS5 *WAS* supported, you should have installed 5.11, the latest release. If you say that you've got someone telling you MUST use CentOS 5.4, then I suggest finding another product to support. There's a hint as to what you would need to do, if you still want to run an insecure and unsupportable product: >From http://mirror.centos.org/centos/5/readme : This directory (and version of CentOS) is depreciated. CentOS-5 is now past EOL You can get the last released version of centos 5.11 here: http://vault.centos.org/5.11/ Please NOTE: this is not being maintained for security since moving to Vault. It will have security issues, you should upgrade to a new version instead. -- Jonathan Billings <billings at negate.org>