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DevOps-Notes 3.0.12-20241230 documentation

Basic-Concepts

  • Boot Process
  • CPU
  • Memory
  • Swap
  • Storage
  • File Systems
  • Provisioning
  • Package-Management
  • Hardware
  • SSH
  • Editors
  • Utilities

Web Servers

  • Web-Servers
  • Apache
  • Nginx
  • HAProxy
  • SSL

Uptime

  • Monitoring
  • Graphing
  • Logging

Internet

  • Networking
  • Security
  • IPTables

Programming

  • Generic
  • Python
  • Bash
  • Ruby

Version Control

  • GIT

Configuration Management

  • Ansible
  • Puppet
  • Chef
  • Terraform

Virtualization

  • Docker
  • Kubernetes
  • AWS

Databases

  • MySQL
  • PostgreSQL
  • NoSQL
  • Redis
  • Kafka

Mail Servers

  • Email
  • Postfix
  • Exim
  • Dovecot
  • Milters
  • SPF & DKIM
  • ClamAV

Domain Name Servers

  • DNS
  • .rst

Memory

Contents

  • Concepts
  • Commands
    • Free Command - Explained
    • Other Commands
  • Configuration
    • Create a RAM Disk
  • Troubleshooting & Log Parsing

Memory#

Some useful links to explain the concepts of Memory

Concepts#

  • https://ioflood.com/blog/making-sense-of-linux-memory-usage-part-1-how-to-read-top-in-centos/

  • https://www.reddit.com/r/linux/comments/1hk5ow/free_buffer_swap_dirty_procmeminfo_explained/

  • https://samwho.dev/memory-allocation/

Commands#

Free Command - Explained#

  • https://www.linuxatemyram.com/

  • https://cloudibee.com/2008/02/14/know-about-procmeminfo/

Other Commands#

  • https://www.thegeekstuff.com/2010/08/ipcs-command-examples/

_images/memory-semaphores-ipcs.png
  • https://www.tecmint.com/dool-monitor-linux-server-performance-process-memory-network/

Configuration#

  • pixelb/ps_mem

Create a RAM Disk#

  • https://www.jamescoyle.net/how-to/943-create-a-ram-disk-in-linux

Troubleshooting & Log Parsing#

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CPU

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Swap

Contents
  • Concepts
  • Commands
    • Free Command - Explained
    • Other Commands
  • Configuration
    • Create a RAM Disk
  • Troubleshooting & Log Parsing

By Vinay Hegde

© Copyright 2024-2025, Vinay Hegde.