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Home Archives for cloud, edge and everything in between administration and orchestration Linux
How to attach and mount an NVMe EBS volume on EC2

Cloud Insidr 2022-03-21 Leave a Comment

How to attach and mount an NVMe EBS volume on EC2

The versatile advantages of NVMe are becoming increasingly apparent in modern storage systems. You can take advantage of them in the cloud.

[Read more…]

Filed Under: Linux, tips and tricks Tagged With: AWS EBS, EBS, EC2, NVMe

SELinux security contexts: correcting SELinux labels on a file system

Filipe Martins 2022-03-21 2 Comments

SELinux security contexts: correcting SELinux labels on a file system

SELinux can be such a nuisance. In particular, if you have a newly created file system, you will need to add labels to it, also known as SELinux security contexts.

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Filed Under: Linux, NGINX, SELinux, Uncategorized Tagged With: cyber security, SELinux

It’s never too late: cron 101

Cloud Insidr 2019-07-23 Leave a Comment

It’s never too late: cron 101

Good ol’ fashioned cron can greatly simplify system maintenance.

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Filed Under: administration and orchestration, Linux, tips and tricks Tagged With: automation, cron

How to upgrade the Linux kernel in Fedora 28/29 quickly and easily

Cloud Insidr 2018-06-17 Leave a Comment

How to upgrade the Linux kernel in Fedora 28/29 quickly and easily

As zero-day exploits become increasingly common, keeping the kernel up to date is a top priority.

In CentOS 6.x/7.x and RHEL 6x./7.x, upgrading the Linux Kernel is a painful procedure which requires about a dozen steps. On Fedora, all it takes is a time-saving two-liner. You don’t need to concern yourself with the configuration of the grub boot manager, which is a frequent source of trouble on CentOS and RHEL.

[Read more…]

Filed Under: Linux, Uncategorized Tagged With: CentOS, Fedora, Fedora 28, Linux, Linux Kernel, RHEL, upgrade

A fix for Spectre & Meltdown: update your Linux kernel in place (running CentOS/RHEL 7 or above), and live happily ever after

Cloud Insidr 2018-04-04 5 Comments

A fix for Spectre & Meltdown: update your Linux kernel in place (running CentOS/RHEL 7 or above), and live happily ever after

If you launch an instance from the official CentOS or RHEL 7.x AMI on AWS, you will be running kernel 3.1 as of this writing. That’s not a good idea. You can easily take advantage of improved security features of newer kernels that are already available in a stable release. The renowned Linux kernel maintainer Greg Kroah-Hartman released the Linux Kernel 4.14.15, which includes important fixes for Spectre & Meltdown. Here is how to update your Linux kernel from 3.1 to 4.16.11 in place.

[Read more…]

Filed Under: cybersecurity and cyber warfare, Linux Tagged With: AWS, grub, kernel, Linux

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