HAZERCLOUD – DevOps Blog – DevOps as a Service, from the Cloud Experts

How to restrict s3 readable only from certain IP addresses or CloudFlare Only

In many scenarios, it becomes crucial to control and limit access to your S3 bucket to specific IP addresses. Recently, we encountered a situation where we needed to grant access exclusively to CloudFlare IPs. To address this requirement, we implemented a solution by incorporating conditions into our S3 bucket policy. This approach allows for fine-grained …

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Failed to create temporary file: /var/lib/mod_security/20xx

Leave a Comment / CentOS, SysAdmin / By Jobin Joseph

Today, the developer reported that the he is not able to upload some files. As we checked, we were getting the following error on mod_security log. It looks like apache is getting denied while writing in to /var/lib/mod_security/ location. As a quick fix, we have modified the mod_security.conf configuration file located at /etc/httpd/conf.d/mod_security.conf Once modified, …

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How to verify the AWS ec2 RSA key Fingerprint – SOLVED

Leave a Comment / AWS / By Jobin Joseph

Sometimes, the SSH key that you have or shared by another person may not be letting you in. In such cases, we need to compare the fingerprint of the key with the one showing on your AWS console. By running the following commands locally on a terminal, you will be able to see the fingerprint. …

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AWS Lambda Task timed out after 3.02 seconds [SOLVED]

Leave a Comment / AWS / By Jobin Joseph

Dealing with AWS Lambda timeouts? Don’t fret, I’ve got you covered! Go to the AWS Console and Navigate to the Lambda Console. Click on your Lambda function name you are facing issues with. Head to General configuration section and Click Edit Change the Timeout Value as needed. For example, you can set the value as …

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How to create a new sudo / super admin / wheel user in AlmaLinux CentOS Ubuntu

Leave a Comment / AWS / By Jobin Joseph

The “wheel” user has special privileges that allow it to perform administrative tasks on the system. To create a wheel user, follow these steps: That’s it! You’ve successfully created a new wheel user in AlmaLinux 8. To log in to the new account, simply type the username and password you set in step 3 at …

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How to configure ELK stack on Almalinux 8 / CentOS

Leave a Comment / AWS / By Jobin Joseph

o configure ELK on AlmaLinux 8, you will need to first install the Elastic stack on your system. This can be done by following these steps: After completing these steps, your ELK stack should be installed and configured on AlmaLinux 8. You can then use Kibana to manage and visualize your data. To set up …

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sign_and_send_pubkey: no mutual signature supported

2 Comments / AWS / By Jobin Joseph

Issue Today i was not able to SSH to one of my CentOS7 Server. I have got the below error on SSH. Also, tried to SSH to couple of other servers launched during that time and received the same error. As i checked, my mac was updated recently to Ventura 13.0.1 and it looks like …

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How to extend the Linux file system after increasing the EBS volume on the EC2 instance?

Leave a Comment / AWS / By Jobin Joseph

How to install node.js on User Level – CentOS RHEL Amazon Linux

Leave a Comment / DevOps / By Jobin Joseph

This article explains how you can install node package on user-level without having root access. This method was tested on CentOS 7 and Amazon Linux 2. However, this method should work on any Linux version. Please comment below if you are facing any issues. Create a user for your node application. In our case and …

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CentOS 6 – YumRepo Error: All mirror URLs are not using ftp, http[s] or file.

2 Comments / CentOS, DevOps / By Jobin Joseph

Hello folks… Today I was trying to install a package on an old CentOS 6 server and got the below error. Loaded plugins: fastestmirror, presto, security Setting up Install Process Determining fastest mirrors YumRepo Error: All mirror URLs are not using ftp, http[s] or file. Eg. Invalid release/repo/arch combination/ removing mirrorlist with no valid mirrors: …

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