本篇内容介绍了“shell的read命令怎么用”的有关知识，在实际案例的操作过程中，不少人都会遇到这样的困境，接下来就让小编带领大家学习一下如何处理这些情况吧！希望大家仔细阅读，能够学有所成！

1、read基本读取

1#!/bin/bash2#testingthereadcommand34echo-n"Enteryouname:"#echo-n让用户直接在后面输入5readname#输入的多个文本将保存在一个变量中6echo"Hello$name,welcometomyprogram."执行：#./read.shEnteryouname:wangtaoHellowangtao,welcometomyprogram.2、read -p （直接在read命令行指定提示符）

1#!/bin/bash2#testingtheread-poption3read-p"Pleaseenteryourage:"age4days=$[$age*365]5echo"Thatmakesyouover$daysdaysold!"执行：#./age.shPleaseenteryourage:23Thatmakesyouover8395daysold!3、read -p （指定多个变量）

1#!/bin/bash2#enteringmultiplevariables34read-p"Enteryourname:"firstlast5echo"Checkingdatafor$last,$first"执行：#./read1.shEnteryourname:abCheckingdataforb,a4、read 命令中不指定变量，那么read命名将它收到的任何数据都放在特殊环境变量REPLY中

1#!/bin/bash2#testingtheREPLYenvironmentvariable34read-p"Enteranumber:"5factorial=16for((count=1;count$REPLY;count++))7do8factorial=$[$factorial*$count]#等号两端不要有空格9done10echo"Thefactorialof$REPLYis$factorial"执行：./read2.shEnteranumber:6Thefactorialof6is7205、超时, 等待输入的秒数（read -t）

1#!/bin/bash2#timingthedataentry34ifread-t5-p"Pleaseenteryourname:"name#记得加-p参数，直接在read命令行指定提示符5then6echo"Hello$name,welcometomyscript"7else8echo9echo"Sorry,tooslow!"10fi执行：#./read3.shPleaseenteryourname:Sorry,tooslow!#./read3.shPleaseenteryourname:wangHellowang,welcometomyscript6、read命令对输入的字符判断

1#!/bin/bash2#gettingjustonecharacterofinput34read-n1-p"Doyouwanttocontinue[Y/N]?"answer5case$answerin6Y|y)echo7echo"fine,continueon...";;8N|n)echo9echo"OK,goodbye"10exit;;11esac执行：#./read4.shDoyouwanttocontinue[Y/N]?yfine,continueon..../read4.shDoyouwanttocontinue[Y/N]?nOK,goodbye7、隐藏方式读取（read -s）

1#!/bin/bash2#hidinginputdatafromthemonitor34read-s-p"Enteryourpasswd:"pass#-s参数使得read读入的字符隐藏5echo6echo"Isyourpasswdreadlly$pass?"~执行：#./read5.shEnteryourpasswd:Isyourpasswdreadllyosfile@206?8、从文本中读取

1#!/bin/bash2#readingdatafromafile34count=15cattest|whilereadline6do7echo"Line$count:$line"8count=$[$count+1]9done10echo"Finishedprocessingthefile"执行：./read6.shLine1:Thequickbrowndogjumpsoverthelazyfox.Line2:Thisisatest,thisisonlyatest.Line3:ORomeo,Romeo!WhereforeartthouRomeo?Finishedprocessingthefile

“shell的read命令怎么用”的内容就介绍到这里了，感谢大家的阅读。如果想了解更多行业相关的知识可以关注亿速云网站，小编将为大家输出更多高质量的实用文章！