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patching tasks

 Patching a Linux system is a critical task to ensure that the system remains secure, stable, and up-to-date with the latest features and fixes. Here’s a comprehensive guide to the tasks involved in Linux patching: 1. Pre-Patching Preparation Backup System : Ensure you have a full system backup, including critical data, configuration files, and applications. Test the backup to verify its integrity. Check Disk Space : Verify that you have enough disk space, particularly on /var , /tmp , and /boot partitions. Review Current Patch Level : Determine the current patch level and installed packages using package management tools like yum , apt , dpkg , or rpm . Check System Logs : Review system logs to identify any issues that might affect the patching process. Test in a Staging Environment : If possible, apply patches in a staging environment that mirrors production to identify potential issues. Notify Stakeholders : Inform stakeholders about the scheduled maintenance window and expected do
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Linux Prepatching tasks

 Pre-patching tasks in a Linux environment are critical to ensuring a smooth and successful patching process. These tasks help in minimizing downtime, preventing issues during the patching, and ensuring the system's stability. Here’s a checklist of common pre-patching tasks you should perform: 1. Backup Critical Data Full System Backup : Perform a full system backup, including configuration files, databases, and critical application data. Verify Backup Integrity : Ensure that the backup is complete and can be restored if necessary. 2. Review Patch Notes Understand the Patch : Review the release notes and documentation for the patches you plan to apply. Understand what is being updated and any potential impact on your system. Check Dependencies : Verify that all dependencies for the patches are met, including hardware, software, and configuration requirements. 3. Check System Health Disk Space : Ensure there is sufficient disk space available, especially on /var , /tmp , and /boot
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Most used bash Scripts

  1. Backup Scripts Automated Backup : Backs up files or directories to a specified location (local or remote) and often runs on a schedule via cron . Database Backup : Dumps a database (e.g., MySQL, PostgreSQL) and stores the backup in a secure location. 2. System Monitoring Scripts Disk Usage Monitoring : Checks disk space usage and sends an alert if usage exceeds a threshold. Process Monitoring : Monitors the status of critical processes and restarts them if they are not running. Service Health Check : Regularly checks if services (e.g., web server, database) are running and restarts them if necessary. 3. System Update Scripts Automated Patching : Updates system packages and applies patches on a regular basis. Kernel Upgrade : Automates the process of upgrading the Linux kernel on a server. 4. User and Permission Management User Account Creation : Automates the creation of user accounts with predefined settings (e.g., home directory, shell). Permission Setup : Sets permissions and o
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Associate cloud Engineer notes

 google cloud offers below services:  compute  storage big data  machine learning  application services at the end of this notes you will be able to :  identify the value of the google cloud products  use application deployment environment on google cloud use google storage options  interact with google cloud service describe the ways in which customers use google cloud .   >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>. TOPICS:  cloud computing  IAAS ,PAAS,SAAS pricing and billing google cloud hierarchy  IAM VPC  compute engine scaling virtual machines through load balancer cloud DNS and CDN  google cloud storage options  storage classes and data transfer  cloud SQL  cloud spanner  Firestore Bigtable  comparing storage options  containers in cloud  kubernetes  google kubernetes engine  hybrid and multi cloud  Anthos  App
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AWS cloud practitioner notes

 AWS Certified cloud practitioner: What is cloud computing? cloud computing is the on demand delivery of the compute power, database storage, applications and other IT resources through a cloud services platform with pay-as-you-go pricing. you can provision exactly the right type and size of the computing resources you need. you can access many resources as you need almost instantly like servers, storage,databases and application services as well. Amazon web services owns and maintains the network connected hardware required for these application services, while you provision and use what you need via a web application. ***************************************** Deployment models of Cloud: Private Cloud: Cloud service used by a single organisation, not exposed to the public. complete control. security of the sensitive applications meeting specific business needs. ********************** Public Cloud: Cloud resources owned and operated by the third party. cloud service provider delivers r
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