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LINUX INTERNALS
Linux Training Overview

This course focuses on the elements of the Linux kernel that allow programmers to build software components that are linked to the hardware level. Students gain a general understanding of basic tools and interfaces in order to successfully modify features and develop new aspects of the kernel.

Linux Training Audience

Programmers, software designers, and technical managers who plan to use Linux below the application level.

Linux Training Prerequisites

Advanced UNIX Programming is recommended. Strong C programming skills and intermediate knowledge of UNIX/Linux shell commands are required. UNIX/Linux application development experience is recommended.

Linux Training Course duration

5 Days

Linux Training Course outline

Introduction to Linux Internals

  • Introduction and environmental setup
  • Main characteristics of the Linux operating system
  • Linux distributions
  • Kernel configuration facilities
  • Building the kernel
  • Location of components
  • Compiling
  • Kernel Overview
  • Important data structures
  • Processes and tasks
  • Files and inodes
  • Dynamic memory management
  • Queues and semaphores
  • System time and timers
  • Primary algorithms
  • Signals
  • Interrupts
  • System booting
  • Timer interrupt
  • Scheduler
  • System call implementation
  • Description of system calls
  • Practical examples
  • Adding new system calls
  • Memory Management
  • Architecture-dependent memory model Pages
  • Virtual address space
  • Linear address conversion
  • Page table and page directory
  • Middle page directory
  • Virtual address space model
  • User segment
  • Virtual memory
  • The brk system call
  • Mapping functions
  • Kernel segment
  • Static and dynamic memory allocation in the kernel
  • Block device caching
  • Block buffering
  • Update and bdflush
  • List structures for the buffer cache
  • How to use the buffer cache
  • Paging in Linux
  • Page cache management
  • Finding free pages
  • Page exceptions
  • Inter-Process Communication
  • Synchronization
  • Communication via files
  • Pipes
  • Debugging using ptrace
  • System V IPC
  • Socket-based communications
  • File System
  • Basic aspects
  • VFS
  • Mouting a file system
  • Superblock
  • The Inode concept and operations
  • File operations
  • Directory cache
  • Proc filesystem
  • Ext2 filesystem
  • Structure
  • Directories
  • Block allocation
  • Extensions
  • System Calls
  • Initialization
  • Process management
  • Memory management
  • Communication
  • Filesystem
  • Kernel-Related Commands
  • ps
  • top
  • free
  • init
  • shutdown
  • strace
  • traceroute
  • mount
  • Device Drivers
  • Character vs block devices
  • Polling and interrupts
  • Polling and interrupt mode
  • Interrupt sharing
  • Bottom halves
  • Task queues
  • Implementation
  • Setup
  • Init
  • Open and release
  • Read and write
  • Ioctl
  • Select
  • Lseek
  • Mmap
  • Readdir
  • Fsync and fasync
  • Module Management
  • Interfaces to modules
  • Adding/removing modules to the Kernel
  • Insmod
  • Modprobe
  • Rmmod
  • Implementation details
  • Network
  • Layer model
  • Network communications
  • Data structures
  • Socket
  • sk_buff
  • Inet socket
  • proto
  • Devices
  • Ethernet
  • SLIP and PPP
  • Loopback
  • Dummy device
  • Protocols
  • Arp
  • IP
  • Functions
  • Routing
  • Multicasting
  • Packet filters
  • Accounting
  • Firewalls
  • UDP
  • Standard and extra functions
  • TCP
  • Standard functions
  • Communication details
  • SCSI Subsystem
  • Architecture overview
  • Names and conventions
  • Upper level
  • Block devices (hard disks, CD-ROM)
  • Character devices (tape)
  • Generic drivers
  • Mid level (boot parameters, proc interface)
  • Lower (hardware) level and pseudo drivers
  • Boot Process
  • Booting details
  • LILO
  • Started by MBR
  • Started by a boot manager
  • Structure in the MBR
  • Files
  • Parameters
  • Start-up messages
  • Error messages
  • Debugging Tools
  • ptrace
  • SysRq
  • KDB
  • User Mode Linux
  • kgdb

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