Linux

List All Packages Installed by a Specific Repo in CentOS / RedHat with YUM

Red Hat Enterprise Linux (RHEL), Fedora, CentOS and Scientific Linux allows administrators to add and enable multiple repositories [...]

By |2016-12-09T08:39:11-08:00Modified: December 9, 2016|Published: January 29th, 2015|Categories: Linux|Tags: , , , , , |0 Comments

CentOS YUM / RPM Error: rpmts_HdrFromFdno / rpmdbNextIterator: Header V3 RSA/SHA1 Signature Key ID BAD

When running YUM or RPM commands, the following errors occurred: error: rpmts_HdrFromFdno: Header V3 RSA/SHA1 Signature, key ID [...]

By |2020-05-20T07:52:09-07:00Modified: May 20, 2020|Published: January 29th, 2015|Categories: Linux|Tags: , , |17 Comments

Cannot Retrieve Metalink for Repository: EPEL

When using yum to install or update software packages through "yum install" or "yum update" commands, the following [...]

Create & Migrate Existing Working RedHat / CentOS System to RAID 1 / RAID 10

Linux system has built-in support for software RAID, through MD devices aka Linux Software RAID. Most Linux distributions [...]

By |2019-06-11T05:40:55-07:00Modified: June 11, 2019|Published: January 27th, 2015|Categories: Linux|Tags: , , , , , |9 Comments

Sync RHEL / CentOS Server Time with Authoritative Time Server Automatically

In Linux server running Red Hat Enterprise Linux (RHEL) or CentOS, the time of the server may become [...]

By |2019-09-06T14:11:33-07:00Modified: September 6, 2019|Published: December 17th, 2014|Categories: Linux|Tags: , , , , |0 Comments

Mail: Command Not Found in Linux (RedHat / CentOS / Debian / Ubuntu)

In Linux operating system such as Red Hat Enterprise Linux (RHEL), CentOS and Ubuntu, the following error may [...]

By |2016-12-09T08:39:15-08:00Modified: December 9, 2016|Published: December 7th, 2014|Categories: Linux|Tags: , , , , , , , |1 Comment

Perl Module This Distribution Requires a Working Compiler at Makefile.PL

When compiling and installing a Perl module from source via CPAN or CPANM (CPANMinus) on Linux such as [...]

By |2016-12-09T08:39:16-08:00Modified: December 9, 2016|Published: November 11th, 2014|Categories: Linux|Tags: , , , , , , , , , , |0 Comments

How to Read User Mail in the Webmin / Virtualmin / Cloudmin

Webmin is a web-based GUI interface to manage UNIX and Linux systems. Webmin is also the base of [...]

By |2020-01-21T05:26:44-08:00Modified: January 21, 2020|Published: November 10th, 2014|Categories: Linux|Tags: , , , , , , , , , , , |0 Comments