Azure Linux Support Team

Support for Linux on Azure

Best Practices: Monitoring Linux VM utilization with sysstat

Sysstat is a very interesting option to enable system monitoring without sacrificing performance and disk storage. Some distributions have it installed but disabled by default, other distributions you have to install it manually. With the steps provided in this article you can get sysstat up and running so you can have history data to analyze… Read more

Linux Recovery: Cannot SSH to Linux VM due to file system errors (fsck, inodes)

When a Linux VM requires fsck to repair possible file system issues, manual intervention will be required. Below you can see four examples on how to identify file system issues by looking at the boot diagnostics on a given VM under: Virtual Machines > VMNAME >  All settings > Boot diagnostics Example (1) Checking all file systems. [/sbin/fsck.ext4… Read more

Linux Recovery: Using CHROOT steps to recover VMs that are not accessible

You are facing an issue where you might need to basically delete a virtual machine (VM) , keep its OSDisk and attach it to another Linux VM where you can then repair whatever is wrong on that old VM, however in some instances you would also be able to have network access and some way… Read more

Best Practices: Using SSH keys to access Linux VMs on Azure

When deploying Linux workloads on Azure, Microsoft highly recommends using SSH keys since they provide a more secure way of logging on to a Linux instance using SSH than using normal passwords. Most of the time passwords can be cracked with for example a brute force attack whereas SSH keys are nearly impossible to decipher… Read more

Best Practices: Running Linux on Azure

A lot of times we help customers getting the best out of running their workloads on Azure using any of our Endorsed Linux Distributions. There are a few best practices and recommendations that will sure help getting the most out of your Linux virtual machines and we would like to share a few of them. A… Read more

Azure CLI: How to delete and re-deploy a VM from VHD

NOTE: Recently the azure cli has changed to the az cli, unless you have the older azure cli tools still installed, you should visit the new and updated post with instructions for the az cli here. Unless you are still using the old azure cli tool, the instructions bellow will not work in the new… Read more

Linux Recovery: Cannot SSH to Linux VM due to FSTAB errors.

There are a few cases where a VM might stop booting up properly if the syntax in fstab is not correct and also if a data disk is missing (not attached to the VM) as well as other reasons. Traditionally in Linux you can mount a scsi device by using the following format in fstab:… Read more