obd2 instructions

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ARP Instructions for Linux

ARP: the ARP cache in the management system Usage: ARP [options] -A: Displays the host name using BSD usage. -E: Displays the host name using the Linux usage. -D: Deletes the cached record for the IP address and MAC address. ARP: The Chinese name is the address Resolution Protocol, which is used to resolve IP addresses in the network to hardware addresses (MAC addresses)Examples of ARP applications are as follows: Check IP address via MAC address:#arp The Physical Address-

Install VIM, simple Linux instructions

the main function.Compile the common framework and classes used into a static library, which is a collection of. o files. You can save a lot of time when you compile.* So if someone else's static library is. o file I can't read it when I enter a file with VI How do I know how he uses it?is to do another [function name].h file, just declare this functional head.For example, the Max function. h file isint max (int a,int b);Save it.So the Max function has these types of filesMax.cMax.oMax.hOf cour

Instructions for using Vim

Instructions for using VimVim is a rich and powerful text editor, and Vim is a text editor developed from VI. Its code completion, compilation and error jump and other convenient programming features are particularly rich, in the programmer is widely used.Vim is very convenient to use: vim [options] [File ...]1, vim can edit the specified file, you can also directly start the Vim editor for editing, for opening the specified file editing can be added

4_linux_ file compression and decompression instructions

option indicates that details are displayed, the-F option indicates the specified decompression file, and the-Z option indicates decompression and is extracted to the current directory5) Zip compressed files and directoriesThe Zip command is used to compress a file or directory , where the path is/usr/bin/zip, with the syntax in the following format:Zip option [-r] [filename after compression] [file or directory]Where the-r option represents a compressed directory, and the compressed file forma

Linux SELinux conversion instructions between several modes

CentOS system quickly shuts down SELinuxSELinux is an enforced access control (MAC) security system based on the domain-type model (DOMAIN-TYPE), which is written by the NSA and designed into kernel modules, and some of the corresponding security-related applications have been patched by SELinux, and finally there is a corresponding security policy. Although the CentOS system is relatively safe and stable compared to the other. My experience in long-term Linux practice is that SELinux is the na

Key instructions for the VIM editor

replace the one character where the cursor is, and R will always replace the text of the cursor until the ESC key is pressed (common)Three. command-line mode: W writes the edited data to the hard drive file (common): w! Force the file to be written if the file is read-only: Q leave VI (common): q! If you have modified the file and do not want to save, use! Force to leave: Wq left after savingZZ If the file is not changed, do not save the left, if the file is changed, save left: W[filename] Save

Linux file System (partition) Operations Management Instructions Summary

repair the file systemCommon command formats:fsck [Options] DeviceCommon Options explained:-A automatically repairs the file system after a problem is found, without asking the user if it needs repairing-T Fstype Specifies the type of file system to be checked and repaired, and generally does not need to specify8.CommandE2fsckSpecialized InspectionExt2/3File SystemCommon command format:e2fsck [Options] DeviceCommon Options explained:-a|-p Automatic repair file system-N Check not fix onlyThis ar

GeoIP Legacy City Database Installation Instructions

directory. For example, on Linux/unix, you could run:$ MV geolitecity.dat/usr/local/share/geoip/To uncompress the CSV format, you can use any of the ZIP program, such as WinZip for Windows, or unzip on Linux. Then you can load the CSV database into a SQL database. Learn MoreStep 3–query DatabaseFor the binary databases, we supply APIs for most major programming languages. Need to point the API code to The/usr/local/share/geoip/geolitecity.dat location. Each API has documentation and example pro

Set maximum file open number under Linux nofile and Nr_open, File-max instructions

of files occasionally some posts also said to modify the File-max, literally see File-max really like the maximum number of files, and in the kernel document they are two explanations:File-max:The value of File-max denotes the maximum number of file-handles that the Linux kernel would allocate. When you get lotsof error messages about running out of the file handles, you mightwant to increase this limitExecution: Grep-r Memtotal/proc/meminfo | awk ' {printf ("%d", $2/10)} ', can be seen similar

"XX cannot is resolved to a type" eclipse error and resolution instructions

(1) JDK mismatch (or non-existent)The JDK specified by the project is "jdk1.6.0_18", while current eclipse is using "jdk1.6.0_22". Need to be in BuildPath | Libraries, make simple adjustments in.(2) Missing or conflicting jar packagesThis error is reported when the jar containing the "XX" is not found. Resolve only need to find (CTRL + click, may see the jar package name) corresponding to the Jar package import project.In addition, this error will also be reported when the same xx appears. You m

Python Time,calendar Module Basic instructions

=2,l=1,c=6) is equivalent toPrintCalendar.calendar (year,w,l,c).9 Calendar.prmonth (year,month,w=2,l=1) is equivalent toPrintCalendar.calendar (year,w,l,c). 10Calendar.setfirstweekday (Weekday) sets the weekly start date code. 0 (Monday) to 6 (Sunday). 11Calendar.timegm (tupletime) and time.gmtime instead: accept a time tuple form, returning the time of the moment (the number of floating-point seconds elapsed after the 1970 era). 12calendar.weekday (Year,month,day) returns the date code for the

Weibo Java SDK Introduction and usage instructions

. Authorized authenticationThe first step is to fill in the configuration file:Fill in the relevant configuration, app key, Secret, and Redirect_url.The second step gets the code parameter:Run the Oauth4code class, get code, the code that appears on the address bar after the user authorizes the loginThe third step is to Exchange Access_token by code:Through the acquisition of code, in exchange for Accesstoken, complete the authorization certification.2. Share to WeiboUpdateStatus class to run Co

Instructions for using DD commands under Linux

What is the meaning of DD If=/dev/zero of=? Instructions for using DD commands under Linux I. Explanation of the DD commandDD: Copies a file with a block of the specified size and makes the specified conversion at the same time as the copy. Note: Where the number is specified, the number is multiplied by the following character: b=512;c=1;k=1024;w=2parameter Comment:1. if= file name: Enter a file name, default to stan

Linux Common Instructions Operation notes

a.apk.5. View installed softwareUbuntu:Dpkg-l//View all installed softwareDpkg-l | grep Tomcat//See if software like Tomcat is installed6, how to check whether the Linux system is 32-bit or 64-bitgetconf word_bit Results: Display 16 or 32getconf long_bit Results: Display 32 or 64or file Bin/ls7. View NAT mapping table for LinuxIptables-t NAT-VLSome people on the Internet also say that using iptables-t nat-l-nHowever, it is a mistake to verify that the iptables command does not have the-l option

Linux Static library and dynamic library usage instructions

system Ldconfig–v output dynamic link library scan directory and refresh Ld.so.cache cache Root permission is required to execute ldconfig. Since it is a dynamic link library, it needs to be developed for other people to use. According to the C language style, H header file provides the interface description of the function library, just like the stdio.h header file, the input and output we use must contain this header file. To use our own dynamic link libraries, include the header files provid

Two-process dual-screen software shortcut key design and use instructions

shortcut keys, must not do other similar operation shortcut key operation. Avoid triggering this shortcut, triggering an unexpected field operation.The following "Live two-screen management system-multi-threaded lottery version" Software as an example, say its operation process, other software similar:When intending to draw, the draw ppt control Area panel status is as follows:When you click on the shortcut button, the Draw ppt control Area panel status is as follows ( Note: 360 sometimes mista

Eclipse Install SVN plugin and instructions for use

your changes.Be sure to update your project (see "Update Project") before attempting to commit the change. Right-click the project and select Team > Commit from the menu. Eclipse displays a Commit dialog box (see Figure 18) that summarizes the changes you made.If you look closely, you'll see a property change to the project directory (I've addedSvn:ignoreProperty so that some files remain outside the repository), and when you add Threadwork.c, MAIN.C is removed. The change pair actually represe

Linux instructions in detail SCP transfer files between Linux hosts

Specify the remote directory and the file nameExample:# scp/doiido/hello.sh [Email Protected]:/doiido# scp/doiido/hello.sh [Email protected]:/doiido/newhello.sh# scp/doiido/hello.sh 192.168.100.2:/doiido# scp/doiido/hello.sh 192.168.100.2:/doiido/newhello.sh2, will remote replication to localfrom remote Copy to local, as long as the copy from the local to the remote command of the following 2 parameter swap order, as the syntax, here is only a list of examples;# SCP [Email protected]:/doiido/do

Self-developed email components and instructions, source files

Myemail Version 1.0 Usage Instructions Myemial is an email component I wrote myself, to be honest, to call the 1.0 edition a little ashamed, because some Features are not yet complete, now the disadvantage is not yet supported HTML format, CC and BCC can only support one message Address, but I will complete these functions in a day or two. This component includes the following properties and methods: Property: MailServer: Your mail server, can also be

Python collection and HEAPQ module usage instructions

function of one argument that isused to extract a comparison key from each element in the IT Erable:key=str.lower equivalent to:sorted (iterable, key=key,reverse=true) [: n] Heapq.nsmallest (n, iterable, Key=none) Return a list with the n smallest elements from the dataset defined byiterable. Key, if provided, specifies a function of one argument that isused to extract a comparison key from each element in the IT Erable:key=str.lower equivalent to:sorted (

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