Executing yum command under centos always fails

Problem:

Executing the yum command displays the Could not resolve host: mirrorlist.centos.org; Unknown error error.

Solution:

1. Use the following command to add the DNS service in the resolve.conf file.

vi /etc/resolv.conf

(Recommended tutorial: centos tutorial)

2. Use the following command to add DNS service to the ifcfg-ens33 file .

vi /etc/sysconfig/network-scripts/ifcfg-ens33

#3. Use the following command to restart the network card.

service network restart

4. Use the yum command to install gcc and test whether yum works well.

yum -y install gcc pcre-devel openssl openssl-devel

The result is as shown:

Recommended related video tutorials: linux video tutorial

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