uppercase characters

Definition and usageThe replace () method is used to replace other characters with some characters in a string, or to replace a substring that matches a regular expression.GrammarStringobject.replace (regexp/substr,replacement) parameter

Text Sequence type-Str (immutable)class Str (object= ")class Str (object=b ', encoding= ' Utf-8 ', errors= ' strict ')Return a string version of object. If Object is not provided, returns the empty string. Otherwise, the behavior of str () depends

From: http://www.ibm.com/developerworks/cn/linux/sdk/dll/index.htmlWhy write an entire application when you just write a plugin?Plugins and DLLs are often a great way to add functionality without having to write an entire new application. In Linux,

DD: 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=2First, parameter

--from "Brother Bird's Linux private dish"--summarize and make it convenient for inspectionaccess to variables : EchoEcho $variableEcho $PATHEcho ${path}Configuration rules for variables1. Variables and variable contents are linked by an equal sign "

Reproduced1. String functionsFunction Name Parameter Example descriptionASCII (string expression)Select ASCII (' ABC ') returns 97Returns the ASCII code of the leftmost character in the string.Char (An integer expression)Select char (100) returns

Command tips:Tips for command exercise:Ctrl + A cursor jumps to the topCtrl + e cursor jumps to the end of a career CTRL + u delete the cursor to the beginning of the contentCtrl + k Delete cursor to end of line contentCtrl + L for clear

1: File PermissionsThere are three types of user access to a file: R (Read), W (write), X. It's a little different for files and directories.File:R: Use the text View tool to view its file contents.W: Use the text Editing tool to edit its file

Bash featuresTerminal, the interface program attached to the terminal:Gui:kde, GNome, XFCECli:/etc/shellsBashZshFishFeatures of bash:Command line expansion: ~, {}Command aliases: Alias, UnaliasCommand history: HistoricalFile name wildcard:

One: Shared account check配置名称：用户账号分配检查，避免共享账号存在配置要求：1、系统需按照实际用户分配账号； 2、避免不同用户间共享账号，避免用户账号和服务器间通信使用的账号共享。操作指南：参考配置操作：cat /etc/passwd查看当前所有用户的情况；检查方法：命令cat /etc/passwd查看当前所有用户的信息，与管理员确认是否有共享账号情况存在。配置方法：如需建立用户，参考如下： #useradd username

IO Redirection and pipingAlways mentioned, program: Instruction + dataIn fact, the program also has IO, the source of data has many places: file, externalDevices available for input: Files (all Linux files)Keyboard device, file system on the regular

All the hardware devices in the Linux system are represented and used in the way of files, we refer to these files as device files, there are a large number of device files in the/dev directory under Linux, and they are divided into character device

Linux Shell Advanced Tips (i)Http://www.cnblogs.com/stephen-liu74/archive/2011/12/22/2271167.htmlFirst, the input information is converted to uppercase characters before the condition judgmentSetting output level for debug informationThird, judging

1. Special symbols for regular expressions.[: Alnum:]: On behalf of English uppercase and lowercase characters and numbers;[: Alpha:]: Represents the English uppercase and lowercase characters;[: Blank:]: Represents the space bar and the [Tab] key;[:

I. OverviewStrings are almost ubiquitous in JavaScript, and when you are working with the user's input data, when you read or set the properties of a DOM object, while manipulating the cookie, there are of course more .... The core part of

Array: A contiguous memory space that holds multiple elements.Declaring an array: bash-4 support In addition to the default 0,1,2 ... You can also customize the index format, which is called an associative arrayDeclaring an indexed array: declare-a

S.strip (chars) s.find (x,start,end) s.index (x.start,end)#see above;S.format ()#see above;S.partition (x)#see above;S.replace (X,y,n)#replace x with Y, optional n means maximum substitution n times;S.split (X,n)#divide up to n times, S.rsplit ()

The command history of Bash's underlying features:Command history: The shell process saves commands that were previously executed by the user in its session~] #historyCustomizing the history function, which can be implemented by environment

Text functionsCHARCHAR: Returns the corresponding character according to the specified number. The Char function converts the numeric code of other types of computers to characters.Number: The digit that specifies the character, in 1Number: The

Python string built-in functionsPython's string commonly built-in functions are as follows: Serial Number Method and Description 1 Capitalize ()Converts the first character of a string to uppercase