megabits per second

Copyright Notice Update:2017-05-20Bo Master: LuckyalanContact: [Email protected]Statement: Draft not forget to dig well man, reproduced please indicate the source!1 Article IntroductionThis article describes the MV command below Linux.2. Development platformLinux Systems3. Reading instructionsNo4 Article body5 References1, the concept of this part of the reference to Wikipedia"Not to be Continued"One Linux command per day (+): Tail command

: Digitally numbered backup3.control=existing or nil: if there is a digitally numbered backup, continue numbering the backup M+1...N:There is a digitally numbered file log2.txt.~1~ before performing the MV operation, then execution will produce log2.txt~2~, and so on. If you don't have a digitally numbered file before, use the simple backup described below.4.control=simple or never: Use simple backup: A simple backup is made before being overwritten, a simple backup can only have one copy, and a

should belong to the original code, binary files, or Help files. The Whereis program also has the ability to search for source code, specify alternate search paths, and search for unusual items.3. Command parameters:-B locates the executable file.-M locate the help file.-S Locate the source code file.-U searches the default path for files other than executables, source code files, and Help files.-b Specifies the path to the search executable file.-m specifies the path to the search Help file.-

; Test.log //Ping remote host in background. and output files to Test.log; This practice also allows for more than one file to monitor.Use CTRL + C to terminate. Example 3: Displaying a file starting from line 5thCommand:Tail-n +5 Log2014.logOutput:[[email protected] test] # Cat Log2014.log 2014-012014-022014-032014-042014-052014-062014-072014-082014-092014-102014-112014-12==============================[Root@localhost test]# tail-n +5 log2014.log 2014-052014-062014-072014-082014-092014-102014-1

docOutput:[Email protected] scf]# tree.|--bin|--doc| |--Info| '--product|--Lib|--logs| |--Info| '--product'--Service'--Deploy|--Info'--productDirectories, 0 files[Email protected] scf]# rmdir docRmdir:doc: Directory Non-empty[Email protected] scf]# rmdir doc/info[Email protected] scf]# rmdir doc/product[Email protected] scf]# tree.|--bin|--doc|--Lib|--logs| |--Info| '--product'--Service'--Deploy|--Info'--productTen directories, 0 filesDescriptionRmDir Directory name command cannot delete a non-

Vim also has a period of time, feel that the function used is relatively simple, and sometimes editing work contains a lot of repetition.Well, be familiar with the new instructions every week.GD---cursor There is a word, the role of this command is to highlight the entire text and can use n jump to the nextCC---clears the current row but does not delete it to continue editingVisualization options:Create anti-white areas:Control + v→ Block selectionv→ In addition to the starting line, the rows ar

. Briefly describe the meaning of the viewThe meaning of a view lies in two ways:1) simplify complex queries. If you need to perform a complex query frequently, you can build a view based on this complex query, and then query this view.2) Restrict data access. A view is essentially a SELECT statement, so when you access the view, you can only access the columns that are involved in the corresponding SELECT statement, and the other columns in the Base table act as security and secrecy.11. What ar

Yesterday said the string concatenation, today to say connected, I mean a bunch of non-array or collection types of content to spell a string out.The simplest is to use the + operator, and then there are StringBuilder and StringBuffer. If it is taught in training schools, it is generally said that the preferred use of StringBuilder followed by StringBuffer, do not use + inefficient. In fact, it is enough to use + in most cases, because + is actually compiled after StringBuilder (no StringBuilder

write down the code that filters sensitive words, you have to think about how far "free" is from you.For example, use a Python-generated letter captcha image.Temporarily do not consider joining the "algorithm" related topics in the short term.Welcome to mention issues, pull Request out the topic, Paste code (Gist, blog can):-)Finally, welcome friends in Beijing, riding together, eating and chatting, writing code:-)Email: [Email protected]qq:499065469#==== Crossin's Programming classroom ====#Id

With the addition of a new feature in Java7, switch can accept variables of type string, which saves the complexity of writing large if ("xxx". Equals (YYY)). The sample code is exempt, just a change of data type, if you will use the original switch and in 5 minutes to make a string type of switch, it is recommended to abandon the programmer it ...As for the internal implementation, Java does not add new content, in fact, the code is converted into this waySwitch (Xxx.hashcode ()) {case 1024x768

number of requests for one minute is 0 o'clock, return 0defpush_falcon (Self,data,url): "" " Data push to Openfalcon "" "Host=self.hostname () Current_time=int (Time.time ()) payload= [{"endpoint": host, "metric": "nginx_request_percent", "timestamp": current_time, "step": NBSP;60, "value": data, "CounterType": "GAUGE", "tags": "nginx_request_percent=10ms",}]json_data= Json.dumps (payload) printjson_datares=requests.post ("Http://127.0.0.1:1988/v1/push", Data=json_data) defmain ():# log file lo

;int *losers= newint[n];intj =0; while(Count >1) {person*Q= NULL; for(inti =0; I m; ++i) {Q= First; First = First->Next; }if(first = = Persons->first) {Persons->first = first->Next; Persons-> Last= persons->first; }Else if(First = = Persons-> Last) {Q-Next= first->Next; Persons-> Last=Q; }Else{Q-Next= first->Next; }--count; Losers[j++] = first->id; First = First->Next; } Losers[j] = persons->first->id;Delete[]t;DeletePersonsreturnLosers;}int_tmain (intARGC, _tchar* argv[]) {

" Introduction "grep: A powerful text-search tool that uses regular expressions to search for text and print matching lines"Grep common usage"[[email protected] ~]# grep [-ACINV] [--color=auto] ' search string ' filenameOptions and Parameters:-A: binary files are searched for data in the form of a text file-C: Calculates the number of ' search string ' found-I: Ignore different case-N: Output line number-V: Reverse selection, which shows the line without the ' search string ' content!--color=aut

Hello everyone, I am still your old friend at the end of the claim, a day more come, today we update is the Linux directory structure characteristics;1. What are the Linux directory structure features?Absolute path: A more precise display path[Email protected] ~]# Cd/dataRelative paths: Paths that do not start from the root, more quickly, relative paths are relative to the current directory;[email protected]/]# cat Data/test.txtoldgirl[[email protected]/]#Devices that are mounted in 2.LinuxEach

:touch01 0 April : A.logExample 3: Update Log1.log time and Log2.log timestamp same[[email protected] dir1]# ll total dosage0-rw-r--r--1Root root0April - +: ,A.log-rw-r--r--1Root root0April - +: AB.log[[email protected] dir1]#Touch-r a.log B.log [[email protected] dir1]# ll total dosage0-rw-r--r--1Root root0April - +: ,A.log-rw-r--r--1Root root0April - +: ,B.logExample 4: Setting the timestamp of a file[[email protected] dir1]# ll total dosage0-rw-r--r--1Root root0April - +: ,A.log[[emai

information4. Usage examples:Example 1: Finding files, displaying command pathsCommand:Which lsmodOutput:[email protected] ~]# which PWD/bin/pwd[email protected] ~]# which adduser/usr/sbin/adduser[Email protected] ~]#DescriptionWhich is to search for a running file based on the directory within the PATH variable configured by the user! Therefore, the different PATH configuration content found the command of course not the same!Example 2: Use which to find whichCommand:which whichOutput:[email p

Software Foundation, Inc. License: GPLv3+:GNU General Public License version 3rd or later //gnu.org/licenses/gpl.html>. This software is free software: You are free to modify and republish it. There is no other guarantee within the scope of the law. Written by Paul Rubin, Arnold Robbins, Jim Kingdon, David MacKenzie, and Randy Smith. (5) OtherDescription-T time uses the value specified as a new value for the corresponding time stamp of the specified file. The time specified here is a decimal nu

1. Introduction to CommandsWhereis (whereis) command is used to locate instructions for the path of the binaries, source code files, and the Man manual page and other related files. The Whereis command can only be used for program name searches, and only binary files (parameter-B), man description file (parameter-m), and source code file (parameter-s) are searched. If the argument is omitted, all information is returned. Whereis looks very fast when compared to find, because the Linux system rec

such as DD, the data is cached to buffer cache.#p # page Title #e# so we look at Linux, as long as we do not swap space swap, there is no need to worry about their memory too little. If you use a lot of swap, you might want to consider adding physical memory. This is also the standard for Linux to see if memory is sufficient.In the case of an application server, the general only looks at the second line, +buffers/cache, which is too little memory for the application, and it is time to consider

:1RX packets:8712548 errors:0 dropped:0 overruns:0 frame:0#p# pagination title #e#TX packets:36685 errors:0 dropped:0 overruns:0 carrier:0collisions:0 txqueuelen:1000RX bytes:597072333 (569.4 MiB) TX bytes:2650581 (2.5 MIB)Lo Link encap:local Loopbackinet addr:127.0.0.1 mask:255.0.0.0Up LOOPBACK RUNNING mtu:16436 metric:1RX packets:9973 errors:0 dropped:0 overruns:0 frame:0TX packets:9973 errors:0 dropped:0 overruns:0 carrier:0collisions:0 txqueuelen:0RX bytes:518096 (505.9 KiB) TX bytes:518096