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This record reads the following commands such as mkdir, rmdir, tree, Dirname,basename, Cat, TAC, more, less, tail, head, touch, file, CP, MV, RM, WC, cut, sort, u Niq use formats, common options, and what they have to use. Directory

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#!/bin/bashPa=abc.comJa=/javawebTt=/usr/local/tomcat#Add an instance, and make the appropriate settingsAIAS () {Echo-e "\ n"[!-D $JA] && echo "Warning:not found $JA, please check && exit 1[!-D $TT] && echo "Warning:not found $TT, please check &&

Smart backup and restoration of configuration files. Intelligent backup and restoration of configuration files: each time we upgrade or update services for many of the same machines, we need to back up one or more lines in the configuration file, or

Smart backup and restoration of configuration filesUse Cases:Every time we upgrade or update services for many machines, we need to back up one or more rows in the configuration file, or one or more data blocks, after upgrading and updating services,

In PHP, single and double quotes are not interoperable, the specific difference is as follows: The fields inside the double quotes are interpreted by the compiler and then exported as HTML code. ' Single quotes inside without explanation, direct

(1) Definition of an array[Email protected]:~# a= (1 2 3 4)[Email protected]:~# echo ${a[1]}2[Email protected]:~# a[0]=1[Email protected]:~# a[1]=2[Email protected]:~# echo ${a[0]}1(2) Array worth acquiring[Email protected]:~# var[0]=1[Email

/* If reproduced, please specify the author Original Author: He Zhiqiang Improvement: sonymusic[Sonymusic@163.net] File: ubb.php Remark: Say is an improvement, in fact, the core function parse () has been completely rewritten, and the idea is not

UBB /* If reproduced, please specify the author Author: He Zhiqiang File: ubb.php Remark: Say is an improvement, in fact, the core function parse () has been completely rewritten, and the idea is not the same. However, is still inspired by the He

/* If reproduced, please specify the author Original Author: He Zhiqiang Improvement: sonymusic[Sonymusic@163.net] File: ubb.php Remark: Say is an improvement, in fact, the core function parse () has been completely rewritten, and the idea is not