linux desktop 2017

is dabbler, there is no real skills. Mixed with the fear of future hardware, I think it is necessary to refuel in private to learn about Linux embedded development. Learning Linux embedded development, a very big project, a little start-up, fortunately, the online material is very rich, want to learn to have small into should be easier, first set a small goal, every day to write a blog, the study of

__switch_to () must only RET to here, and can not be as needed ret to ret_from_fork. When a process is dispatched again, it starts from 1: Executes, pops the EBP, and pops the flags.This experiment lets us see how Linux processes the process and when it is scheduled to switch. We studied several process scheduling functions and saw how the system was processed and recovered in the event of a deadlock condition. Process scheduling is the most importan

1. TopicsOld boy Education Daily-May 12, 2017-disk knowledge point: How to Implement LVM configuration in Linux system?2. Refer to answer 01: Create one or more physical partitions as a PV#pvcreate/dev/sdb{1,2}physicalvolume "/DEV/SDB1" successfullycreatedphysical volume "/DEV/SDB2" successfullycreated#pvs #02:VG configuration (assuming the creation of a 2G VG, i.e. two 1G of PV)# vgcreate myvg/dev/sdb{1,2}

Old boy Education Daily-May 2, 2017-linux system, the chmod command does not have Execute permissions (x permission) or chmod command file permissions of 000, how to solve? There are two ways to resolve this:[email protected] bin]# CP cp/oldboy/chmod.new(At this point the Copy CP command file is named Chmod.new, at this time the Chmod.new file has permissions on X, but Chmod.new does not have the chmod comm

an old boy's education daily -2017-04-18: Command storm: How to quickly delete large amounts of small files in Linux? today is the day that the old boy educates the day to accompany everyone . For questions and answers, please leave a comment in the blog comments section.Index of the topic of the previous periodhttp://lidao.blog.51cto.com/3388056/1914205This article is from the "Lee blog" blog, make sure to

store their pending block I/O requests in the request queue, which is represented by the request_queue struct. Each item in the Request queue table is a separate request, represented by the reques struct. Because a request may operate on multiple contiguous disk blocks, all requests can be made up of multiple bio structures.7. Although the blocks on the disk must be contiguous, these blocks in memory do not necessarily have to be contiguous.The job of the 8.I/O Scheduler is to manage the reques

Linux Kernel 'Mm/hugetlb. c' Local Denial of Service Vulnerability (CVE-2017-15127)Linux Kernel 'Mm/hugetlb. c' Local Denial of Service Vulnerability (CVE-2017-15127) Release date:Updated on:Affected Systems: Linux kernel Description: Bugtraq id: 102517CVE (CAN) ID: C

1, u-boot:http://ftp.denx.de/pub/u-boot/2, the Linux environment using the TAR Command decompression package: TAR-XZVF file.tar.gz TAR-XVF File.tar//Unpacking the TAR PackageTAR-XZVF file.tar.gz//Decompression tar.gzTAR-XJVF file.tar.bz2//Decompression tar.bz2TAR-XZVF file.tar.z//Unzip tar. ZTAR-JXVF FLE.TAR.XZ//Decompression TAR.XZ 3, modify the makefile file inside the cross-compilation tool.4, specify the CPU, specify th

layer) After Trojan file is passed. important configuration files, commands, and WEB configuration and other files to do MD5 fingerprint and backup. install anti-virus software ClamAV and so on, regular monitoring of the Trojan horse. Configure the server firewall and intrusion detection services. Monitor server file changes, process changes, port changes, critical security logs, and timely alarms. (iv) from the perspective of internal management: prevention of the right to be rai

substitution) Compilation: Gcc-x cpp-output–s Hello.s–o Hello.cpp-m32 (Gcc–s call CCL, compiled into assembly code) Assembly: Gcc-x assembler–c Hello.s–o hello.o; (Gcc-c call as, get binary) Link: gcc–o He Llo hello.o; gcc-o (call ld form target executable) links are classified as static links and dynamic links. Static chaining is delivered to three main elf target files: 1. relocatable Files: Save code and appropriate data to create an executable file or a shared file with other object fi

experiment:The experiment code is as follows: 1 int g (int x) 2 { 3 return x + 3; 4} 5 6 int f (int x) 7 { 8 return g (x); 9} ten int main (void) { return F (8) + 1; 14}The assembler program is as followsThe above-mentioned compilation process can be described. But there is a thought, Under Linux, the. C program is preprocessed all the way up to the assembly operation described above, and I would like to use the same code for the sam

correctly judged, so the return is correct.When input and ' 1 ' = ' 2 o'clock, the background executes the SQL statement:select * from The syntax is correct, but the logic is wrong, so it returns correctly.Summarize:This "Introduction to the Fundamentals of SQL injection" experiment with two examples gives me a rough idea of SQL injection and the power of SQL injection. Common techniques for SQL injection include: Use of non-mainstream channel technology Avoid input filtering techn

Linux Kernel Local Denial of Service Vulnerability (CVE-2017-18232)Linux Kernel Local Denial of Service Vulnerability (CVE-2017-18232) Release date:Updated on:Affected Systems: Linux kernel Description: Bugtraq id: 103423CVE (CAN) ID: CVE-

, the command can be used in this softwareFiles: Documents used or referenced or linked to by this software or dataSee alse: A reference to other instructions related to this commandEXAMPLE: Some examples you can refer to, this is the most usefulBUGS: Whether there is a related bug3. Related actions in manCTRL + F or PAGE DOWN: pages downCTRL + B or PAGE up: pages upGG to First lineGG to the last line/start: Can search the entire manual for Start-related characters, use N to find the next, use N

display_time_and_date();void getting_started();void signal_white_now(int);#endif2.main.cThe file contains the main function, creates a socket listener, parses the packet, and writes the parsing result to Log.txt:#include 3.show_data.cThe file is to write the packet information to the Log.txt:#include 4.tools.h and TOOLS.C define color, signal processing functions:#ifndef __COLOR_H__#define __COLOR_H__#include #include Third, the experiment1. Running ResultsA UDP packet in the 2.log.txtFour, off

: Task_running, which is the ready state, but not running; When the scheduler selects this process, the state switches to the task_running state but is running; When a running process terminates, it enters task_ Zombie State, the system will dispose of this process, and when a process waits for a specific resource or event, it will enter the state of the blocking state task_interruptible or task_uninterruptible. At this point, if the event occurs or the resource is available, the process is woke

The code is as follows: see note for details#include #includestring.h>#include#includeintMain () {structtimeval start; structTM *local_time =NULL; Static Charstr_time[ -]; Charms[ -]; Gettimeofday (start, NULL);//Gets the current time, the struct returns the Unix timestamp seconds and the number of microseconds Local_time= LocalTime (start.tv_sec);//convert the seconds to Standard Time strftime (Str_time,sizeof(Str_time),"%y-%m-%dt%h:%m:%s", Local_time); sprintf (MS,".%ld", start.tv_usec); strca

Ctrl + Actrl + Ectrl + Cctrl + Dctrl + Lctrl + Uctrl + Kctrl + Rctrl + yAnswer:1.1.1Cursor MovementCTRL + a switch to the command line start CTRL + E to switch to the end of the command line1.1.2Cut PasteCTRL + U Clear (cut) the contents of the cursor before CTRL + K Clear (cut) the contents of the cursor after CTRL + Y paste ESC + F move the cursor to the end of the word ESC + B move the cursor to the beginning of the word CTRL + b the cursor moves the position of a symbol to the left CTRL + Fà

statistics on yourLinuxSystem ofHistoryhistory to draw your favorite use of the former10a commandmethod One:awk Array Method[[Email protected] ~]# history |awk ' {H[$2]++}end{for (key in H) Printkey,h[key]} ' |sort-rnk2|headawk 279ll 78cat 66cd 41ls 34find 32echo 32man 30sed 27vim 26#优雅的显示可以加上 |column-t can[[Email protected] ~]# history |awk ' {H[$2]++}end{for (key in h) print Key,h[key]} ' |sort-rnk2|head |column-tawk 279ll 78cat 66cd 41ls 34find 32echo 32man 30sed 27vim 26Method Two: Simple tr

# user parameters and passwords. Password=oldboy123# Password parameters and password. [Email protected]~]# MySQL# you don't have to enter a password to log into the database at this time. Welcometo the MySQL Monitor.Commands Endwith; or \g. Yourmysql Connection ID is 8 serverversion:5.6.34 Source distribution ... Omit several lines ...Type ' help ', ' or ' \h ' for help. Type ' \c ' to clearthe the current input statement. Mysql>The way to know that there are tigers on the Hill:[[Email protecte