How to Backup Linux Using dd Command Examples

Data loss will be costly. At the very least, critical data loss will have a financial impact on companies of all sizes. In some cases, it can cost your job. I’ve seen cases where sysadmins learned this in the hard way.

Linux SysAdm/DevOps Interview Questions

A collection of Linux SysAdm/DevOps interview questions with my answers

10 more essential Linux commands you need to know

I n this article, I explore commands that every system administrator should know for troubleshooting, general housekeeping, and daily activities that you must perform.

What are SSH keys for?

You create a pair of keys using ssh-keygen. These are plain text and can be cut and pasted , copied, as required. One is private (e.g. id_rsa), and you need to protect this as you would any other security artifact such as server passwords, and you can optionally
secure with a pass phrase. The other is public (e.g.id_rsa.pub), and you can share with anyone.

Monitoring Linux and Windows hosts with Glances

The Glances tool offers more information about system performance than other sysadmin monitoring tools.