Tag Archives: centos7

Linux ate my RAM Script to Check Usage

Linux ate my ram is a worrying thing to look at the first time you check top or free -m as it appears the linux cached memory high and showing the buff/cache too high. Understanding how linux uses disk caching for the speed of your system, and how everything is ok, and how to check if there is… Read More »

Increase swap space in Redhat 7 | Centos 7

So you would like to add more swap space in Redhat 7 or Centos 7 after installation. Sometimes it is necessary to add more swap space after installation. For example, you may upgrade the amount of RAM in your system from 512 MB to 1026 MB, but there is only 512 MB of swap space. It might be… Read More »

create ssh key

In Linux and most other Linux distributions you can use ssh key pairs to easily remote into other systems and run scripts remotely. This is extremely useful when managing multiple Linux hosts and if you wish to gather reports from one central source. What are SSH Key Pairs? SSH key pairs are two cryptographically secure keys that can be… Read More »

How to set the grub password in CentOS 7

Cent OS 7 and most other Linux distributions use the GRUB2 boot loader. This guide shows you How to set the grub password in CentOS 7 and test it. The GRUB Menu can be protected by a password and this guide shows you how to set the grub password in CentOS 7.