json editor linux

contents of the next n rowsP: Paste operations on copied content4. Related Quick actionU:undo RevocationJ: Merge up and down two linesR: Single character substitution.: Repeatedly upload the most recent instructionsDrwxr-xr-x, 2 Haifeng haifeng 4096 September 21 09:38 's PhotosSeparate: Master permissions same group user rights other groups user rights file group of owner fileMaster: Haifeng to file permissions: R read W write X ExecuteSame group of users: Huo to file permissions: R Read W writ

　　Delete one character: XDelete one line of characters: DDRecover Delete: UCancel command: Ctrl+r　　Copy and paste: P y　　Paste: PCopy: Y　　Find string:/　　Find string in current text hello: ":/hello"　Jump to a line: G or: N　　The command ": N" allows the cursor to jump to a low n line, or "NG" jumps to the nth row. Note G must be capitalized.This is useful when modifying the error line of a program or debugger.　　Vim Learning Document: Enter Vimtutor in bash.Format settings for 4.vimNumber of spaces

This article is your own study notes, welcome reprint, but please specify the source: http://blog.csdn.net/jesson20121020The most powerful text editor under Linux is Vi/vim, and its commands, if used flexibly, are more efficient than other text editors when writing programs or editing text.Vi/vim There are no menus, only commands, there are three modes of operation: Command mode, insert mode, and edit mode,

edit operationThe continuous u command undoes the previous n edit operations#u: Undo Recent # edits directlyUndo the most recent undo action: Ctrl+r12. Repeat the previous edit operationDot character.13, the visualization mode is used to delete the copy and paste operationsV: Select by characterV: Select by rectangle14, find (support regular expression, in the last row mode)/pattern from yourselves to tail? PATTERN from current to headerN: Find from top to bottomN: Find from bottom to topXV, fi

Tags: filename mode vi editor Common data characters size Delete InuxVI filename into VI modeFirst the most commonly used DD: delete the whole line where the cursor is located ;D1G: Removes all data from the first row of the cursor;DG: Removes all data from the cursor to the last line;d$: Delete the cursor to the last character of the row;D0: Deletes the first character of the line to which the cursor is located;x: Delete, equivalent to delete key;X:

Tags: Vim editor command copy operation edit mode position Ctrl Expand CtrThree modes of VIM: Command line mode, edit mode, extended mode1: Common operations in command line modeDeleteA): DD deletes the cursor as it moves forwardb): NDD delete n rows after the current line of the cursorCopyc): YY copy cursor where you are moving forwardd): Nyy The N rows after the current line where the cursor is copiedPastee): P Paste the next line of the cursorf): N

Vim Editor vim是vi编辑器的增强版，是unix/Linux系统默认的文本编辑器Vim three modes of operation 命令模式： vim 输入模式： 按键 I 进入输入模式 末行模式： 按键ESC ： 进入末行模式Vim can create and modify files 新建：Vim 文件名 修改：Vim 已存在的文件 Wq : 保存并退出VIM Command mode operation光标跳转#复制/paste/delete rowsVim end-of-line mode operationSave and exitFind and replaceLinux Account Management1. 用户类型 超级用户：root (0) 系统用户：1-999 （编号）

with P h Adoop, Hadaap :/e> like, source :/\ Find the string starting with had, \ also has special meaning hadoop, Hadoo :/spa * \ spark, Spaspark :/sp[ae]rk match spark or Sperk spark, Sperk 4. Text substitutionText substitution uses the following syntax format::[g][address]s/search-string/replace-string[/option]Where address is used to specify a replacement

/cache/yumYum Create cacheYum Makecache3. Install the software from the source codeTAR-ZXVF xxx.bz2 files, etc.Then go to compile with directory./configureMaking make InstallThe./configure can be set at compile time by selecting--prefix= specific path and parameters4. The most useful tool under the configuration file is Vim's main use:Vim .... txt for editingI enter edit modeESC exits edit mode into command mode: Q Do not save exit: q! Do not save a forced exit, the user has modified the file c

use:P luginupdate":P luginsearch foo-search foo; append '! ' to clear local cache":P Luginclean-Remove unused plug-ins, need to confirm; Append '! ' automatically approve remove unused plugins""check: H vundle for more details and wiki and FAQs"put yourself on a non-plugin fragment after this lineInstall the required plugins The plug-in you want to install, according to the address method, fill in the address between Vundle#begin and vundle#end can be After saving, there are two wa

Noai(cancel) is case sensitive:: Set ignorecase or : Set IC: Set Noic(cancel) to display matching parentheses:: Set Showmatch or : Set SM: Set NOSM(cancel) to display syntax coloring:: Syntax on: Syntax off(cancel) The search results highlighted:: Set Hlsearch: Set NohlsearchGet help:: Set: Help [command]————————————————————All of these are temporary and require long-term and effective changes to the Vim configuration fileVim configuration file:Global:/ETC/VIMRCPersonal:~/.VIMRC————————————————

to N2 are replaced with P2: g/p1/s//p2/g: Replace all P1 in the file with P27) Option settingsAll: List all option settingsTerm: Set terminal typeIgnorance: ignoring case in searchList: Display tab stops (CTRL+I) and end-of-line flags ($)Number: Show line numbersReport: Displays the number modified by the line-oriented commandTerse: Displays a short warning messageWarn: Displays no write message if the current file is not saved when you go to another fileNomagic: Allows the use of special chara

:]: Represents the space bar and TAB key[: Space:]: Any character that generates whitespace, including the spacebar [TAB]CR, etc., [: blank:] is part of [: space:][: Graph:]: All but the space character (SPACEBAR and [Tab] key) All other keys, and [: blank:] the opposite?[: Cntrl:]: All control keys, including Cr,lf,tab,del, etc.[:p rint:]: All characters that can be printed out2. Copy the/boot/grub/grub.conf to/tmp directory and delete the white space characters from the beginning of the/tmp/gr

located D$: Delete to end of line D . copy Yy: Copy the row of the cursor to the buffer. P: Paste the characters in the buffer to the cursor location e ) . replace R : The character at which the cursor is replaced R: Replace the character where the cursor is, until you press ESC F ). Redo the last actionU: If you mistakenly execute a command, you can press U immediately togo back to the previous operation. multiple replies can be performed by multiple "U"2 , la

Server/* *run command: *g++ server.cpp-o server ./server */#ifndef server#define server#includeClient/* * Run command *g++ client.cpp-o client ./client 192.168.111.139#serverip */#ifndef client#define Client#inc ludeSimple Client/server using the Linux Berkeley Socket implementation Editor

Extended mode: R file absolute Path # writes file contents to the next line of the current cursor W filename # writes the current contents of the current VIM open to the filename (new file filename, writes the content) w! FILE1 # Forces the current contents of a vim open file to be written to File1, which overwrites the original content in the File1 (File1 already exists)!command # Temporary execution command (the command cannot be an alias) R!command # Writes command execution results below the

is possible to use a library.However, JSON-C provides some functions beyond the JSON range, and actually completes the functions of data serialization and deserialization, data storage and retrieval, data object and so on. It is of very useful value.Https://github.com/json-c/json-c/wikihttp://zengriguang.blog.163.com/

Use jq-friendly JSON printing skills in Linux and linuxjqjson skills Previously, Cat was used to print JSON under the command line, and the results were copied to the editor supporting JSON parsing. After a simple search, I found an article on StackOverflow. The answer wit

here, the file download progress will be output as follows:[Email protected]:~$ Curl'https://www.tinywan.com/frontend/websocket_client/autoInstallConf'| Jq'. Live_node_config.node1.ip'% Total% Received%xferd Average Speed time time dload Upload Total spent left Speed - 636 0 636 0 0 2053 0--:--:-- --:--:-- --:--:--2058"192.168.10.10"3. Parse non-existent element, will return nullCat ' . live_node_config.node1.ip123 ' NULLThe built-in functions of the JQ, such as: Keys,has1.

Before the command line to print JSON is all cat, and then copy the results to the editor supporting JSON resolution, very tortuous. After a short search, an article was found on the StackOverflow. The highest support for the answer requires python2.6+ support, but the server version of 2.4, the impact of the upgrade is unpredictable, and then give up. Continue