Linux

You can create a device file under/dev by loading the driver module. It is very convenient to automatically delete the device files created under/dev when the driver module is detached. This process is completed by using the device_create () and

A part-time job is required for the project teamProgramStaff, if the job is outstanding, can also be converted to full-time, fresh graduates are preferred.Main conditions:1. Familiar with embedded Linux porting and driver development.2. Have OMAP

This is not the shell command of Shenma. There are not many cmd commands. Just use it ~~ ========================================================== ==== 0. Help Command: Man 1. Create a file (folder): Touch, Vim, mkdir 2. delete a file (folder):

Do some things from the last day of each month to on January 1, 4th day of next month: 05 0 28-31,1-4 ** ['date-d tomorrow + \ % e'-ge 1-a' date + \ % e'-le 4] & do something     With crontab time format introduction: F1 F2 F3 F4 F5 Program

Adding and Deleting Users is a simple task for every Linux system administrator. the tricky thing is that if you want to add dozens, hundreds, or even thousands of users, we are unlikely to add useradd one by one, so we must find a simple method to

Sometimes multiple Ruby or rails will be installed. (For example, if the system comes with an old version of Ruby, a new version is installed by myself ), However, we found that ruby-V was not the version we wanted. This involves the path search

About "_ attribute _ (packed)" in Linux Kernel ))"Source:Http://jimmy-lee.blog.hexun.com/8001013_d.htmlThe function of _ attrubte _ (packed) is to tell the compiler to cancel the optimization alignment of the structure during the compilation process

./Tests: Error while loading shared libraries: XXX. so.0: cannot open shared object file: no such file or directory If this type of error occurs, the system does not know the directory in which xxx. So is stored. In this case, add the directory

In Linux, the input subsystem is provided. input keys, touch screens, keyboards, and mouse can all be driven by the input interface function. Therefore, 12.1 ~ The buttons and touch screen device drivers in section 12.2 can be used as input device

  1. Compile the simplest driver source file main. C: # Include # Include Module_author ("edwardshen "); Module_license ("mplbsd/GPL "); StaticIntHello_init(Void){ Printk (kern_alert "HelloWorld/N

You can directly input dmidecode. There are many outputs, such as queries based on the SM bus, including the address space and information in the BIOS. The memory information is only part of the information. The excerpt is as follows: Code

Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--># Include # Include Static gpointer thread_func (gpointer data){Guint64 result = 0;Guint64 I = 0; For (I = 0; I Result + = I;} G_message ("add

Linux thread and POSIX are incompatible, and in the kernel, a thread is actually a process (but these threads are generated by clone). Therefore, there are many disadvantages, for example, we can see a multi-threaded program in some old systems

1. Hard links actually create an alias for the file. The linked file and the original file are actually the same file. You can use LS-I to check whether the inode numbers of the two files are the same, indicating that they are the same file. The

From: http://blog.csdn.net/do2jiang/article/details/5450839 Almost every type of peripherals is carried out by reading and writing registers on the device, usually including control registers, status registers, and data registers. The peripheral

Linux provides a complex Storage Management System for processors that provide MMU (Storage Manager, which assists the operating system in memory management and hardware support such as virtual/real address translation, the memory that the process

After reading it carefully, I only know a few. I am not qualified. 1) What kernel locks does Linux have? 2) What is the meaning of the user mode and Kernel Mode in Linux? 3) How to Apply for a large kernel memory? 4) What are the main methods for

On Linux terminals, there is no graphic interface tool as useful as Windows Search, but the find command is indeed very powerful. For example, you can use find/-name targetfilename to find a file by name. Alas, if you only know the name and the

1. Introduction to gpio Gpio is a general input and output port. In short, it is some pins that output high and low levels or read the high and low levels of pins through them. S3C2440 has 130 I/O Ports, divided into 9 groups of A-J: GPa, GPB, gpj,

I don't know if this tutorial is useful to you now. After all, DHD is no longer an emperor now, and the old man is a machine. Thanks to cm7.1, I believe that ** smooth operations are very good. Let's get started. (Please turn on your phone for