sdr linux

The waiting queue of Linux kernel is based on the double cyclic list, which is closely combined with the process scheduling mechanism, and can be used to realize the core asynchronous event notification mechanism. In this list, there are two types of data structures: The waiting queue header (wait_queue_head_t) and the Wait queue item (wait_queue_t). Both the wait queue header and the Wait queue item contain a list_head type of domain as a "join". It

You know which linux commands can upload files to remote linux servers and linux FilesIn most cases, Enterprise Services are basically deployed on linux servers.TestStudents must master basic linux commands and at least know how to deploy the overall environment.ServerHow do

[Linux] fully interpreting Linux environment variables and linux environment variablesI. Overview Environment Variable: Bash shell uses a feature called "environment variables" to store information about shell sessions and work environments. It allows you to store data in memory, this allows you to access programs and scripts running on shell. The data can be use

Linux notes: linux software package management, linux software package Introduction to linux software packageSoftware Package category:1. source code package (source code written in C language is not compiled ):Script installation package (source package with optimized installation)Advantages:Open-source, changeableYou

One, Linux time management basicshttp://blog.csdn.net/droidphone/article/details/7975694http://blog.csdn.net/smilingjames/article/details/6205540Linux All-time basis is based on low-level hardware, low-level hardware has GPT and CPU local timer, such as the GPT clock source for the 13M hzlinux low-level time architecture is divided into the clock Source,clock event Device,clock The source layer is divided into xtimer and Hrtimer,xtimer mainly refers t

[Linux] Linux system (process management) and linux System Process Management Process: When we run a program, Linux creates a special environment for the program, including all the resources for running the program. This environment is called a process. Foreground process: Generally, some commands belong to the for

[Linux] Linux system (login, exit, password repair), linux Password To log on to linux, enter the user name and password and press Enter. Change Password Use the passwd command to enter a new password and confirm the password. The password rules are strict. Try multiple times. Run the whoami command to view t

[Linux] Linux system (File Operations), linux System File Operations Linux has three file types: common files, directories, and device files. View files Use the ls command to get ll and view the file list. parameters:-l (list form) and-a (display hidden files) Use metacharacters *? To view the list of matched fil

First, replace the file1. Op.txt is known to exist in the/root/data, how to copy the/root/afeng/op.txt to the data directory and replace2.1[[email protected]/]# \cp/root/afeng/op.txt/root/data/2.2[[email protected] ~]#/bin/cp/root/data/op.txt/root/afeng/Second, VIM's shortcut keysG reach the bottomGG arrives on the first floorO Go to the downstream editorU undo: Wq Save and exit: q! Forced exitThird, set the alias1. Why alias is setSafety: To enter a crowbar when using dangerous commands2. The f

2nd Chapter: Installation Guide 2.1 Pre-Installation Preparation 1, collecting system data: In order to be able to successfully install and set up the Linux system, you must put the following information for the installation of the system to use: HDD: Quantity, capacity and type; Memory: The amount of memory installed on your computer; CD-ROM: interface type (IDE, SCSI); SCSI card: The model number of the card; Network card: The model of the network

[Linux] C language Linux system programming creation process, linux 1. process ID Each process is represented by a unique identifier, namely, the process ID (pid). The system ensures that each pid is unique at a certain time. 1.1 allocate process ID By default, the kernel limits the maximum process ID to 32768. You can set/proc/sys/kernel/pid_max here. In a short

[Linux] C language Linux system programming-11 TCP communication statuses, linux-tcp Three-way handshakeThe client initiates a SYN request, and the client is in the SYN_SENT State (the first handshake)After the server receives the message, it changes from LISTEN to SYN_REVD and replies to the client. After the client receives the response, it is in the state of

[Linux] Linux commands for counting folders and files, and linux statistics # View the number of files in the current directory (excluding files in subdirectories) Ls-l | grep "^-" | wc-l # View the number of files in the current directory (including files in sub-Directories) Note: R, representing sub-Directories Ls-lR | grep "^-" | wc-l # View the number of

maintenanceBadblocksCfdiskDdE2fsckExt2edFsckFsck. minixFsconfFdformatHdparmMformatMkbootdiskMkdosfsMke2fsMkfs. ext2Mkfs. msdosMkinitrdMkisofsMkswapMpartitionSwaponSymlinksSyncMbadblocksMkfs. minixFsck. ext2FdiskLosetupMkfsSfdiskSwapoff8. Network communicationApachectlArpwatchDipGettyMingettyUuxTelnetUulogUustatPpp-offNetconfigNcHttpdIfconfigMinicomMesgDnsconfWallNetstatPingPppstatsSambaSetserialTalkTracerouteTtyNewaliasesUunameNetconfWriteStatserialEfaxPppsetupTcpdumpYtalkCuSmbdTestparmSmbclien

Start to learn linux common commands in detail and stick to one command every day, so this series is a linux command every day. The main reference materials for learning are: 1 "laruence's linux private House dish" 2 http: codingstandardsiteyecomblog7866533linux command 5 Start to learn linux common commands in detail

Linux Overview Linux is a free and free-to-use Unix-like operating system. It is mainly used on Computers Based on Intel x86 series CPUs. The core program (kernel) that controls the basic services of the entire system is developed by Linus. the Linux name is named Linus's unix) GPL is used to issue the program. This Copyright allows anyone to copy and spread the

May 21, 2015 The latest release, the old boy teacher, the new Linux operation to get started classic!Super-rare Linux Classic Enterprise-class introductory combat coursePrice: FreeQuantity: 138 knotsThis Linux high-paying introduction and advanced, for the basic part of the introductory teaching, in a simple, easy-to-use, efficient way for beginners to explain h

How can we become an excellent Linux O M personnel ?, One linux O M Today, I want to talk about how to become a good linux O M personnel ?" I will analyze the current situation of the Linux industry from the following three parts and how to learn and use linux well. I. St

650) this.width=650; "class=" wp-image-70728 size-full "title=" What is Linux "src=" http://www.magedu.com/wp-content/ Uploads/2017/04/timg11_%e7%9c%8b%e5%9b%be%e7%8e%8b.jpg "width=" "height=" 299 "style=" border:0px;vertical-align : middle;height:auto;margin:0px auto; "/> what is Linux ? is a set of unix-like operating system, is a Unix, it control all the System Fundamental Service Center Program (kernel

"My Linux, I am the Master" My Little story with LinuxAgain late at night without sleep, just see this activity, my thoughts immediately back to the university era, a no longer back to the good times.The first statement is that I am not a great God, at least not at present. It's just one of many Linux learning armies.First knowledge of LinuxThe first time I heard that the word