Linux

  Http://blog.lifeibo.com /? P = 244 In practice, skilled use of tools can improve our efficiency. Today, we will briefly understand how to use the SS tool. SS is the socket state, that is, you can view the status of the socket in the system. We

To use ftp, you must install the FTP server. Generally, an FTP server is installed in Linux by default. Run the following command: Rpm-Qa | grep vsftpd Check whether the FTP server is installed. To access the FTP server, the client must start

ArticleDirectory This is another old message that has never been sent, but it is also a cold meal. :( 75% of Linux code is generated by paid developers This is another old message that has never been sent, but it is also a cold meal. :( This

I hope my friends who want to learn Linux can use it a bit. The following is the beginning:. Bz2 ------ compressed Bzip2 File. GZ ------ compressed GZIP file. Tar ------ tar package file (package file is not compressed file). TBZ ------ package tar

For multi-thread programming, the most important thing to note is the shared data, because you cannot know which thread will operate on it at which time, and you cannot know which thread will run first, which thread will run after the meeting.

Linux supports multiple file systems, including ext2, ext3, vfat, NTFS, iso9660, jffs, romfs, and NFS. to centrally manage various file systems, linux introduces Virtual File System (VFS), which provides a unified operation interface and Application

A simple driverNext we will write the first driver, which is very simple and will output the 'hello world' message at runtime. // Hello. c# Include # Include # Include Static int _ init hello_init (void){Printk (kern_alert "Hello world! /N "

The Linux and Windows we use are not the same. The top command may not actually use the memory. The second line of the free command is the actual memory used by the system. Don't panic if you find that your memory is full of PHP-CGI. Page cache and

Linux time functions have their special usage methods. This is easy to ignore in engineering projects. In this article, we will make a summary of the use of time functions in multithreading. First, take a look at a function and remove the one-day

I didn't even talk to you. The last time I talked, I analyzed the entire process of kernel startup. I have learned about the device model and summarized it several times. I will post it on my blog to help you learn and explore it. If you still

I came back again ~ In documentation/kbuild/kconfig.txt, check the configuration file. Don't worry. I found that there is also a 00-index file under this kbuild directory. Obviously, it must be the file under this directory. You should check this

Linux wget is a tool for downloading files. It is used in the command line. Linux users are essential tools. Especially for network administrators, you often need to download software or restore the backup from a remote server to a local server. If

Qt Linux installation manual By Jackie On June 13,200 pm |3 comments | Previous|Next| Edit There are many ways to install QT, and there are a lot of Baidu, but most of the manuals are copied and pasted and cannot be used.Specific installation

I. Related Knowledge Semaphores: an integer;The number of resource entities that tables can be used by concurrent processes when the value is greater than or equal to 0;Number of processes waiting for using the critical section in the age of less

Linux signal Mechanism     The signal provides a mechanism to notify process system events. It is also used for communication and synchronization between user processes.A primitive mechanism. How

// Obtain the subnet mask FunctionQstring getlocalnetmask () { int sock_netmask; char netmask_addr [50]; struct ifreq ifr_mask; struct sockaddr_in * net_mask; sock_netmask = socket (af_inet, sock_stream, 0); If (sock_netmask =-1) { perror

Reprinted: http://hi.baidu.com/springwu/blog/item/267ec345cd9d4628879473ce.html 1. CPU 2. Memory 3. I/O 4. Network 1. CPU We should understand the main parameters of CPU operation: Context switching, running queue, CPU utilization, and average load.

If nothing happens, test Erlang distribution between two machines. One is Windows XP, and the other is redhat9. Without detailed documents, you can find it and record it. 1. First, the implementation of distributed Erlang provides its own security

1. Environment Red Hat Enterprise Linux es Release 4Tomcat5.5Jdk1.6   2. Setup steps (root user login) 1) copy/tomcat_home/bin/Catalina. Sh to/etc/rc. d/init. d. In/etc/rc. d/init. d/Catalina. Sh #! /Bin/sh#-------------------------------------------

DFCommand:Check disk space usage of the file system Commonly used: DF-hi, DF,-ha, DF-th, DF-th-x vfat, Function: You can use this command to obtain the space occupied by the hard disk and the remaining space. Syntax: DF [Option] -A: displays the