下面的脚本中就使用了 read 命令,字面上就像“读取标准输入”。 #!/bin/bash #Here we are asking a question to prompt the user for standard input. i.e.keyboard echo 'Please enter your name.' #Here we are reading the standard input and
#Here we are asking a question to prompt the user for standard input. i.e.keyboard echo 'Please enter your name.' #Here we are reading the standard input and assigning it to the variable name with the read command. read name #We are now going back to standard output, by using echo ...
## ## Set defaults ## prompt=" ==> " template='<!DOCTYPE html> <html lang="en"> <head> <meta charset=utf-8> <title>%s</title> <link href="%s" rel="stylesheet"> </head> <body> <h1>%s</h1> <div id=main> </div> </body> </html> ' ## ## Define shell functions ##...
#!/bin/bash # read -p "Please input an username:" username userid=`id -u $username` if ! `id $username &>/dev/null`;then echo "User $username not exsits." exit 1 elif [ $userid -eq 0 ];then echo "User $username is admin." elif [ $userid -ge 500 ];then echo "User $...
In simple terms, this built-in feature is called to load any feature file(as a parameter) into the current shell script or command prompt. The syntax for the source command The syntax is as follows: In the example above, you can see the dot (.) - it is called a period and this is...
# make less more friendly for non-text input files, see lesspipe(1) #[ -x /usr/bin/lesspipe ] && eval "$(SHELL=/bin/sh lesspipe)" # set variable identifying the chroot you work in (used in the prompt below) if[ -z"${debian_chroot:-}"] && [ -r /etc/debian_chroot ];then ...
script. Let’s take a look at how we could use bash to write scripts that require input from the user. In this example, we will create an activity generator, which will ask the user for their name and then choose a random activity to invite the user to participate in from an array ...
#!/bin/bash # Initializing the input variable name="" # Continuously prompt the user for their name until they enter "quit" while [[ "$name" != "quit" ]]; do # Prompting the user to enter their name echo "Input your name (input 'quit' to exit):" read name # Check if the ...
read [option] “prompt” -p:直接指定一个变量接受参数 -t timaout:指定等待接受参数的时间 -n:表示不换行 例如:输入用户名,可返回其shell#!/bin/bashread-p"Plz input a username: "userNameifid$userName&>/dev/null;thenecho"The shell of$userNameis`grep"^$userName\>"/etc/passwd|cut-d:-f7`....
-p prompt 打印提示,等待输入,并将输入存入 REPLY 中 -r line 允许输入中包含反斜杠 ”\ ” -t timaout:指定等待接受参数的时间 -n:表示不换行 1.3、变量替换 2、bash中的运算 2.1、算数运算:需要变量为数值型,但默认直接进行变量赋值时都是字符型,所以需要显示的定义可以使用declare或let命令。但bash是解释...