Here is a example of while loop controlled by standard input. Until the redirection chain from STDOUT to STDIN to the read command exists the while loop continues. #!/bin/bash# This bash script will locate and replace spaces # in the filenames DIR="." # Controlling a loop with bash re...
shell中使用$env:命令。...export ALLOWED_EMAILS=info@example.com 然后执行程序,输入邮箱地址,如果邮箱地址在环境变量中,程序将返回Email is valid...总结• 使用input函数读取用户输入• 使用getpass模块隐藏用户输入• 使用PyInputPlus包增强用户输入引用链接 [1] 《How to Read User Input From 60110 ...
Linux read命令用于从标准输入读取数值。 read 内部命令被用来从标准输入读取单行数据。这个命令可以用来读取键盘输入,当使用重定向的时候,可以读取文件中的一行数据。 Bash附带了许多内置命令,您可以在命令行或Shell脚本中使用它们。 在本文中,我们将探讨内置的read命令。 bash内置read命令 read是bash内置命令,可从标准...
read命令除了读取键盘输入,可以用来读取文件。 #!/bin/bash filename='/etc/hosts' while read myline do echo "$myline" done < $filename 1. 2. 3. 4. 5. 6. 7. 8. 上面的例子通过read命令,读取一个文件的内容。done命令后面的定向符<,将文件内容导向read命令,每次读取一行,存入变量myline,直到文...
创建键盘输入变量 | read | 3.4 设置变量类型 | declare/typeset | 3.4 创建命令别名 | alias | 4.1 取消命令别名 | unalias | 4.1 查看和管理历史命令 | history | 4.2 重新读取配置文件 | source | 5.4 查看和设置终端配置 | stty | 5.6 数据切片 | cut | 7.1 ...
Reading user input 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 echo 'Select a directory:' done=false while [ $done = false ]; do do=true num=1 for direc in $DIR_STACK; do echo $num) $direc num=$((num+1)) done echo -n 'directory? ' read REPLY if [ $REPL...
#Let's get some information from the user and add it to our scripts with stanard input and read echo "What is your name? " read name #Here standard output directed to append a file to learnToScirptStandardOutput echo "$name, this will take standard output with append >> and redirect ...
[root@localhost ~]# read -p "please input your name with 30s:" -t 30 name please input your name with 30:seric [root@localhost ~]# echo $name eric declare [-aixr] variable //声明变量的类型 -a:声明后接的变量为数组类型 -i:整型变量 -x:环境变量 -r:readonly变量 [root@localhost ~...
[root@localhost tutor]# ./user_input.sh Input aCharacter: ^[ SpecialCharacter. 1. 2. 例3. 写一个脚本,提示用户是否接受协议: [root@localhost tutor]# vim #!/bin/bash # read -p"Do you agree: [Yes|No]:" YesNo case $YesNo in y|Y|[yY][eE][sS]) echo "Agreed, proceed...";...
Reading User InputThe user can enter data into shell variables using read commands.readThis command reads input from stdin into variablesread [-ers] [-a array] [-d delim] [-i text] [-n nchars] [-N nchars] [-p prompt] [-t timeout] [-u fd] [variable1 ...] [variable2 ...]...