Oops!! Frustrated with YUM error 256? We can help you fix it.

This error occurs due to many reasons including corrupted YUM cache, configuration changes, etc.

At Bobcares, we often get requests from our customers to fix YUM error 256 as part of our Server Management Services.

Today, let’s get into the details on how our Support Engineers fix this problem.


When does YUM error 256 occur?

YUM is an open-source package management tool for RedHat Package Manager based Linux systems. It makes package installation a simple process.

However, while using YUM, we may encounter many errors. Today, we discuss in detail on how to fix one such yum error having code 256.

This error occurs mainly due to:

  • corrupted YUM cache
  • inaccessibility of a repository URL from the system
  • due to some configuration mistakes

Let’s see how our Engineers find the fix for this error.


How do we fix?

We just saw the common reasons that could result in Yum errors. And, the fix can vary depending on the triggering reason. Let’s see the top ones.


1. Corrupted Yum cache

Recently, one of our customers approached us with an error in his RHEL6 server. He was trying to install the java package.

Yum error 256

We checked and confirmed that the folder /etc/yum.repos.d contained only valid repositories. The link was also working correctly when accessed via a browser. Thus the problem happened due to YUM cache corruption. So, we did the following:

Firstly, we removed the old YUM cache from the system by running the following commands:

rm -rf /var/cache/yum/*
yum clean all

Then updated the packages using

yum update

Thereafter, the java package installation went on fine.


2. Incorrect repository

Similarly, YUM error 256 can happen due to incorrect repository set up too.

In one of the cases, the customer was using a local repository on his server. Here the GPG check was failing.

Therefore, our Engineers fixed the problem by making the following changes in /etc/yum.repos.d/_local.repo.


That removed the GPG check and the yum started working again.

[Having trouble with YUM commands on your server? We’ll fix it for you.]



In short, this error occurs due to many reasons including corrupted YUM cache, inaccessibility of a repository URL from the system, etc. Also, we saw how our Support Engineers fix this error.

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