RedHat – Not reading root volume based on LVM

Environment Red Hat Enterprise Linux 4 Red Hat Enterprise Linux 5 Red Hat Enterprise Linux 6 Red Hat Enterprise Linux 7 EXT and XFS file system Rescue Mode Issue How to repair filesystem in rescue mode for Red Hat Enterprise Linux System won't load after boot, requests fsck of root file system / (root) filesystem … Continue reading RedHat – Not reading root volume based on LVM

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NFS “nobody” file permission issue

Files in mounted folder owned by nobody:nobody – I’ve tried to change using chown with the existing username and group which also present on the NFS server but still nobody:nobody. A:  If you are not using NFSv4 check the user is recognized/present on client and servers. If it s a local user on the client … Continue reading NFS “nobody” file permission issue

AWS SSO with Azure Active Directory

Tutorial from Azure provided here : https://docs.microsoft.com/en-us/azure/active-directory/active-directory-saas-amazon-web-service-tutorial To configure the integration of Amazon Web Services (AWS) into Azure AD, you need to add Amazon Web Services (AWS) from the gallery to your list of managed SaaS apps. To add Amazon Web Services (AWS) from the gallery, perform the following steps: In the Azure Portal, on the left … Continue reading AWS SSO with Azure Active Directory

AWS – AutoScaling Health Check Timers

Autoscaling without health check of instances is not possible. After all it is how autoscaling maintains the minimum and maximum instances running in healthy state. It is also not possible to suspend the health check temporarily. Autoscaling health check type can be EC2 or ELB. There is an instance in healthy state and running but … Continue reading AWS – AutoScaling Health Check Timers

SFTP – Connections and File Permissions – Part 3

In the last couple of posts SFTP - Connections and File Permissions - Part 1 and SFTP – Connections and File Permissions – Part 2 we configured sftp and looked at the effect of umask when transferring files using sftp. In this post we will configure restricting users to their home directories using chroot.. Before we configure … Continue reading SFTP – Connections and File Permissions – Part 3

AWS Cloud Formation Cross Stack

As mentioned in AWS blog https://aws.amazon.com/blogs/aws/aws-cloudformation-update-yaml-cross-stack-references-simplified-substitution/ Many AWS customers use one “system” CloudFormation stack to set up their environment (VPCs, VPC subnets, security groups, IP addresses, and so forth) and several other “application” stacks to populate it (EC2 & RDS instances, message queues, and the like). Until now there was no easy way for the application … Continue reading AWS Cloud Formation Cross Stack

SFTP – Connections and File Permissions – Part 2

So in our last post SFTP – Connections and File Permissions – Part 1 we discussed SFTP connections, file permissions and the effect of "umask". One thing we should make a note that SFTP server binary is "/usr/libexec/openssh/sftp-server" which we can see in sshd config file. I've also updated "test2" user umask to 0077 and deleted … Continue reading SFTP – Connections and File Permissions – Part 2