linux kernel security

1 Environment PreparationOperating system: ubuntu10.10 32bit Desktop version installed under VMware.Build kernel version: linux-2.6.32.63Kernel directory:/home/wanchouchou/linuxkernel/linux-2.6.32.63For convenience, use chmod 777-r linux-2.6.32.63/to change all kernel files

Tags: include dev unsigned linu for static files is ace SubLinux kernel programming has always been a skill I'd like to master. If you ask me why, I can not say.Maybe one day my id also appears in the message list of the kernel development group? or the kernel release file on the credits file?Maybe it is. In fact more, may be for the bottom of the worship, as wel

1. Basic security measures1.1 System Account CleanupIn the Linux system, in addition to the user manually created, but also included in the system or program during the installation process of a large number of other users, in addition to Superuser root, a large number of other accounts just to maintain the system operation, start or maintain the service process, generally not allowed to log in, and therefo

Char device Mychrdev is registered, major is 254 $ mknod/dev/mychrdev C ' DMESG | grep "char Device Mychrdev" | Sed ' s/.*major is//g ' 0 $ cat/dev/mychrdev $ echo "abcdefghijklmnopqrstuvwxyz" >/dev/mychrdev $ cat/de V/mychrdev abcdefghijklmnopqrstuvwxyz $./syscall-exam-user User process:syscall-exam-us (1433) Available space:65509 bytes Data len:27 bytes Offset in physical:cc0 bytes content by Mychrdev />ABCDEFGHIJKLMNOPQRSTUVWXYZ $ cat/dev/mychrdev ABCDE $

The Android kernel has the same functions as the standard Linux kernel, which mainly implements the functions of memory management, process scheduling, interprocess communication and so on. However, there are differences in file system, interprocess communication, memory management and so on.1, file system . Most mobile devices are not hard drives but flash as st

Test kernel version: Linux kernel 2.6.35 ---- Linux kernel 3.2.1 Original works, reprint please mark http://blog.csdn.net/yming0221/article/details/7572382 For more information, see column http://blog.csdn.net/column/details/linux

The previous chapter describes how to compile the Linux kernel. After an image is obtained, it can be burned to the Development Board for running. However, this will also cause some problems: for example, if you want to add or modify some Linux kernel configurations and components, you must re-compile the

Modify the Linux kernel kernel boot picture (originally a small penguin picture). Reprint please indicate the source: Http://blog.csdn.net/wang_zheng_kai Navigation guidance and Control laboratory December 10, 2014 This article mainly introduces three parts of the content: 1 "How to make the Linux

How to remove the old kernel after Linux kernel upgradeFirst we need to look at which kernel is currently in use: Uname-r This command will tell you the kernel version currently in use Next, if you are compiling the kernel you

One pageThe kernel takes the physical page as the basic unit of memory management; the Memory Management Unit (MMU) transforms the virtual address into a physicalAddresses, which are typically processed in pages. The MMU manages the tables in the system in the page size unit.32-bit system: Page size 4KB64-bit system: Page size 8KBThe kernel represents each physical page in the system with the corresponding

Recently, in the process of reading the book "_windows Kernel security programming in the Cold River," we find that the technical point of modifying the class-driven distribution function, the book only gives specific ideas and part of the code, there is no complete example.According to the author's ideas and code, the example is complete, found that the driver installed in the WIN7 32-bit environment, keyb

Introduction to Linux Kernel Now let's look at the architecture of the Gnu/linux operating system from a relatively high altitude. You can consider the operating system from two levels, as shown in Figure 2. Figure 2. Basic architecture of Gnu/linux operating system The top is the user (or application) space. This

---restore content starts---20135125 Chen ZhiweiOriginal works reproduced please indicate the source"Linux kernel Analysis" MOOC course http://mooc.study.163.com/course/USTC-1000029000 "Experimental requirements:Mykernel Experimental Guidance (how the operating system works)Run and analyze a streamlined operating system kernel to understand how the operating syst

Differences between Linux 0.12 kernel and modern kernel in memory management Linux 0.12 kernel memory management is relatively simple and crude. The kernel only uses one page Directory and can only map 4 GB linear space. Therefore

Background: Sometimes low-core hardware monitoring tools ipmitool can not be used, and the high-core is available, you need to consider upgrading the kernel.[Email protected] ~]# Ls/lib/modules/2.6.32-642.11.1.el6.x86_64/kernel/drivers/char/ipmi/ipmi_Ipmi_devintf.ko Ipmi_msghandler.ko Ipmi_poweroff.ko Ipmi_si.ko Ipmi_watchdog.koActual combat CentOS6.4 Upgrade kernel