Linux

Linux Process 0 and INIT process 1Process 0: the first process created in Linux boot. After the system is loaded, it becomes a process scheduling, switching, and storage management process.Process 1: The INIT process, created by the 0 process,

During this time, I was working on the 3G module and the adaptation and Transplantation of Android. I also participated in some research. After all, I am not very familiar with it. I can only talk about it. In all linux kernels, the USB device

Windows is upgrading every day, and Linux is also the same.ProgramWho do you like more? I think anyone will answer Linux. Of course, if you have never touched it, you have no right to speak. I have seen a lot of posts saying that red-flag Linux is

Once again, one of the company's development machines collapsed. After several changes, the company could no longer find the Administrator. cygwin sometimes used it, but sometimes it could not do anything, so it decided to install a real Linux.

Hardware Detection Program Kuduz new hardware: Service kudzu start (or restart) view CPU information: CAT/proc/cpuinfo view Board information: CAT/proc/PCI view PCI information: lspci (more intuitive than cat/proc/PCI) view memory information:

1. Function call Sequence (Gdb) bt #0 pci_arch_init () at arch/x86/pci/init. c: 13#1 0xc1001255 in do_one_initcall (fn = 0xc17a3afa ) at init/main. c: 758#2 0xc176c963 in do_initcils (unused = ) at init/main. c: 788#3 do_basic_setup (unused = ) at

In the past few days, you need to run a test on Tomcat. Because you do not like to press 8080 in the address bar, modify the configuration file to the standard Web Service port 80. After starting Tomcat, enter the test address and tell me:

This article discusses a bug in P219 in Unix/Linux Programming Practice tutorial. on Linux, The bounce_async.c program code fails to run. Unix has two asynchronous input systems. One method is to send a signal when the input is ready, and the other

Note: To develop an Arm platform driver, you must use the source code tree of the Arm platform;Note: the Linux kernel source code of the ARM platform must be compiled first; otherwise, the driver cannot be compiled;1. The first method of compiling

In a system that supports MMU, the MMU function is enabled after hardware initialization is completed, so that the entire system runs in a virtual bucket, MMU of the processor is used to map a virtual bucket to a physical bucket, while the ing

Author: Yu Lianqing,Hua Qing vision embedded training center lecturer. Linux systems currently mainly maintain 2.4 and 2.6 kernel versions, on the http://www.kernel.org/website has been able to download to the latest 2.6 kernel linux-2.6.38.6, and

0) Preface I have learned that, since, I have been familiar with open-source platforms and have been involved in Linux. During this period, I have recorded all the problems. Although it is very embarrassing, I am afraid to keep it up to myself, the

The Linux Server serves as the gateway for the entire campus network to access the Internet. In the Linux environment, iptables is a flexible IP address filtering tool, this tool can be used only when multiple conditions are met before IP data can

Knowledge about Linux Copyright statement: If you have reprinted request, please indicate the source: http://blog.csdn.net/yzhz Generally, large J2EE applications are built in a Linux environment. In the development environment, we can map the local

The server needs to process some tasks on a regular basis. Generally, the crontab of Linux can be used for processing, which can be accurate to minutes. There are also scheduled tasks in windows, but previously the network administrator said that

Access the VI commandVI filename: open or create a file and place the cursor at the beginning of the first lineVi + N filename: open the file and place the cursor at the beginning of line NVi + filename: open the file and place the cursor at the

  Better Timer class implementation: Linux RTC mechanism implementation Timer classA timer is often used in Linux, but a timer like setitimer () and alarm () sometimes conflict with the sleep () function, this makes programming very difficult.Write

A query process ran very fast at noon, and it took 400 seconds in the afternoon! DBA said the system is faulty. [Oracle @ backup ~] $ PS-AuxWarning: bad syntax, perhaps a bogu '-'? See/usr/share/doc/procps-3.2.3/faqUser PID % CPU % mem vsz RSS tty

Obtain data from/proc/loadavgThe number of tasks in the running queue during runq-sz sampling, excluding the vmstat process. Procs_running-1Number of active tasks in the system during plist-sz sampling nr_threadsLoad of the system (%) lavg_1 of the

In Linux, we generally do not need to release the memory because the system has managed the memory well. But there are exceptions in everything. Sometimes the memory will be occupied by the cache, which will affect the system's performance by using