Linux Kernel Debugging, Kdump, Crash Tool Basics Part-1| Easy Explanation | Youtube
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Linux kernel debugging, Kdump, Crash
Linux kernel debugging, Kdump, Crash tool basics,Kdump is a kernel crash dumping mechanism. It is very reliable because the crash dump is captured from the context of a freshly booted kernel and not from the context of the crashed kernel. Kdump uses kexec to boot into a second kernel whenever system crashes. This second kernel, often called the capture kernel, boots with very little memory and captures the dump image.
Debugging is an essential part of software development, and the Linux kernel is no exception. Linux kernel debugging can be challenging, as it requires a deep understanding of the kernel's architecture and the use of specialized tools.
One of the most commonly used tools for Linux kernel debugging is GDB, the GNU Debugger. GDB is a command-line tool that allows developers to step through the kernel code, set breakpoints, and examine variables and memory contents.
In addition to these tools, Linux kernel developers also use the printk function for debugging. The printk function allows developers to print messages to the kernel's log buffer, which can be viewed using the dmesg command.
Overall, Linux kernel debugging requires a combination of knowledge, skills, and tools to diagnose and resolve issues related to kernel crashes and other problems. With the right approach, developers can effectively debug Linux kernel code and ensure the stability and reliability of their systems.
Kdump is a Linux kernel crash-dump mechanism that enables the kernel to save a copy of the system's memory contents in the event of a crash. The kdump mechanism is implemented as a kernel module and is designed to capture the memory state of a crashed kernel, including the kernel's core image, the memory allocation tables, the kernel stack, and the process table. Once the memory dump has been taken, the system can be rebooted to a normal state, and the kdump tool can be used to analyze the memory dump and determine the cause of the crash. The crash tool is a userspace utility that can be used to analyze the contents of the memory dump created by kdump. It provides a range of options for analyzing the kernel memory contents, including examining the contents of specific memory ranges, searching for specific strings or patterns within the memory dump, and analyzing the call stacks of specific processes. Overall, these tools are essential for diagnosing and resolving issues related to Linux kernel crashes.
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Linux kernel foundation course
Full Stack Linux Kernel & Device Driver Programming Course
Its a complete guided course of ~140+ hrs. combination of following modules.
Life time LMS access
Get full LMS access instantly after enrolling, 125+ hrs of recorded lectures – System programming, Linux Kernel Internals, Linux Device Drivers and Linux Debudding techniques.
Real Time Projects
Work with real time projects through out the course. Expert resources and useful tools to help make your project a success, from ideation to enterprise adoption.
Interview preparation
1-on-1 on demand mock interview sessions will be taken by experts having experience of cracking SDE interviews of tie one company like Samsung, Qualcomm, Intel & Cisco etc.
Contribute to open source
Contributing to open source can be a rewarding way to learn, teach, and build experience in just about any skill you can imagine.
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Linux System Programming
~30 hrs. training
This module will teach you the necessary theory and applications to properly understand the advanced algorithms and concepts of C and Linux system.
Linux Kernel Internals
~30 hrs. training
In this module we will cover Linux Kernel Internals. To have sufficient understanding of Linux Operating System or any other Operating System, for that matter, and what makes them functional at core.
Linux Device Driver
~30 hrs. training
This module teaches you how to develop device drivers in the Linux for projects on embedded platforms -raspberry pi 4, Beaglebone black, or on the traditional PC platform. through theory and practical
Linux Socket Programming
~30 hrs. training
In this module, you will learn Linux Socket Programming which provides quite a complete discussion presented in graphically manner with working programs from the very basic networking up to the packet level.
Network Device Drivers
~30 hrs. training
This module will teach you how to write Linux device driver for PCI device, GPIO (General Purpose IO), USB and pseudo Network device with PING (ICMP protocol) functionality.
Contact : [email protected]
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Like share subscribe our channel for more such content.
Debugging is an essential part of software development, and the Linux kernel is no exception. Linux kernel debugging can be challenging, as it requires a deep understanding of the kernel's architecture and the use of specialized tools.
One of the most commonly used tools for Linux kernel debugging is GDB, the GNU Debugger. GDB is a command-line tool that allows developers to step through the kernel code, set breakpoints, and examine variables and memory contents.
In addition to these tools, Linux kernel developers also use the printk function for debugging. The printk function allows developers to print messages to the kernel's log buffer, which can be viewed using the dmesg command.
Overall, Linux kernel debugging requires a combination of knowledge, skills, and tools to diagnose and resolve issues related to kernel crashes and other problems. With the right approach, developers can effectively debug Linux kernel code and ensure the stability and reliability of their systems.
Kdump is a Linux kernel crash-dump mechanism that enables the kernel to save a copy of the system's memory contents in the event of a crash. The kdump mechanism is implemented as a kernel module and is designed to capture the memory state of a crashed kernel, including the kernel's core image, the memory allocation tables, the kernel stack, and the process table. Once the memory dump has been taken, the system can be rebooted to a normal state, and the kdump tool can be used to analyze the memory dump and determine the cause of the crash. The crash tool is a userspace utility that can be used to analyze the contents of the memory dump created by kdump. It provides a range of options for analyzing the kernel memory contents, including examining the contents of specific memory ranges, searching for specific strings or patterns within the memory dump, and analyzing the call stacks of specific processes. Overall, these tools are essential for diagnosing and resolving issues related to Linux kernel crashes.
-----------------------------------------------------------------------------------------------------------------------------------------------
Linux kernel foundation course
Full Stack Linux Kernel & Device Driver Programming Course
Its a complete guided course of ~140+ hrs. combination of following modules.
Life time LMS access
Get full LMS access instantly after enrolling, 125+ hrs of recorded lectures – System programming, Linux Kernel Internals, Linux Device Drivers and Linux Debudding techniques.
Real Time Projects
Work with real time projects through out the course. Expert resources and useful tools to help make your project a success, from ideation to enterprise adoption.
Interview preparation
1-on-1 on demand mock interview sessions will be taken by experts having experience of cracking SDE interviews of tie one company like Samsung, Qualcomm, Intel & Cisco etc.
Contribute to open source
Contributing to open source can be a rewarding way to learn, teach, and build experience in just about any skill you can imagine.
---------------------------------------------------------------------------------------------------------------------------------------
Linux System Programming
~30 hrs. training
This module will teach you the necessary theory and applications to properly understand the advanced algorithms and concepts of C and Linux system.
Linux Kernel Internals
~30 hrs. training
In this module we will cover Linux Kernel Internals. To have sufficient understanding of Linux Operating System or any other Operating System, for that matter, and what makes them functional at core.
Linux Device Driver
~30 hrs. training
This module teaches you how to develop device drivers in the Linux for projects on embedded platforms -raspberry pi 4, Beaglebone black, or on the traditional PC platform. through theory and practical
Linux Socket Programming
~30 hrs. training
In this module, you will learn Linux Socket Programming which provides quite a complete discussion presented in graphically manner with working programs from the very basic networking up to the packet level.
Network Device Drivers
~30 hrs. training
This module will teach you how to write Linux device driver for PCI device, GPIO (General Purpose IO), USB and pseudo Network device with PING (ICMP protocol) functionality.
Contact : [email protected]
---------------------------------------------------------------------------------------------------------------------------------------
Like share subscribe our channel for more such content.
3 سال پیش
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