Keep in mind that bash comments are only visible on a text editor. 6. Get User Input To take input from users, we’ll use thereadbash command. First, create a new bash shell file: nano read.sh Then, fill it with the script below: #!/bin/bash echo "What is your age?" read age...
progname=${0##*/} ## Get the name of the script without its path ## Default values verbose=0 filename= ## List of options the program will accept; ## those options that take arguments are followed by a colon optstring=f:v ## The loop calls getopts until there are no more options...
That is, the ability of the program to interact with the user. While manyprograms don’t need to be interactive, some programs benefit from being able to acceptinput directly from the user. Take, for example, this script from the previous chapter: 砖业洋__ 2023/05/06 3370 Bash概论 - ...
我正在尝试将 find 的结果保存为数组。这是我的代码: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 #!/bin/bashecho"input : "read input echo"searching file with this pattern '${input}' under present directory"array=`find . -name${input}`len=${#array[*]}echo"found : ${len}"i=0...
5.3User Input If you’re making Bash programs for you or for others to use one way you can get user input is to specify arguments for users to provide to your program, as we discussed in the previous section. You could also ask users to type in a string on the command line by tempo...
file - #!/bin/bash standard input Bourne-Again shell scripttext executable 现在命令从stdin中接受了输入, 并分析它. "-"可以被用来将stdout通过管道传递到其他命令中. 这样就允许使用在一个文件开头添加几行的 技巧. 使用diff命令来另一个文件的某一段进行比较: grep Linux file1 diff file2 - 最后...
#Let's get some information from the user and add it to our scripts with stanard input and read echo "What is your name? " read name #Here standard output directed to append a file to learnToScirptStandardOutput echo "$name, this will take standard output with append >> and redirect ...
#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 ...
比如while : #same as while truedo operation-1 operation-2 ... operation-ndone或者if conditionthen : # Do nothing and branch aheadelse # Or else ... take-some-actionfi除此之外还可以结合重定向符号使用，将文件内容清空，但是不改变文件权限，如果不存在则会自动创建。1: > ...
$USER /etc/passwdMore input> then echo "your user account is not managed locally"; fi your user account is not managed locally anny > echo $? 0 anny > 以下能得到的结果: anny > grep $USER /etc/passwd anny > if [ $? −ne 0 ] ; then echo "not a local account" ; fi not ...