In the previous post, we talked about writingpractical shell scriptsand we saw how it is easy to write a shell script. Today we are going to talk about a tool that does magic to our shell scripts, that tool is the Expect command or Expect scripting language. Expect command or expect scr...
To build an expect script automatically, you can use the autoexpect command. autoexpect works like expect command, but it builds the automation script for you. You pass the script you want to automate to autoexpect as a parameter, and you answer the questions, and autoexpect saves your answers...
your bytes leave the application layer on Host A and travel through the transport and network layers on Host A; then they go down to the physical medium, across the medium, and up again through the various lower levels to the application layer on Host B in much the same way. If...
Sometimes I want to FTP a file from one machine to another. Usually, I can do the transfer interactively, but every so often, I would like to have a shell script do the file transfer. This task has eluded me in the past, but I finally figured it out. I've not seen this particular...
The send command is used to send a reply to a script or a program. The Expect command waits for input. The interact command allows you to define a predefined user interaction. We are going to type a shell script that asks some questions and we will make an Expect script that will answe...
与Unix 系统上的任何程序一样,您需要为 shell 脚本文件设置可执行位,但同时也必须设置读取位,以便 shell 读取该文件。 最简单的方法如下: $ chmod +rx script This chmod command allows other users to read and execute script. If you don’t want that, use the absolute mode 700 instead (and refer ...
与Unix 系统上的任何程序一样,您需要为 shell 脚本文件设置可执行位,但同时也必须设置读取位,以便 shell 读取该文件。 最简单的方法如下: 代码语言:javascript 复制 $ chmod+rx script This chmod command allows other users to read and execute script. If you don’t want that, use the absolute mode 700...
You can use the Windows PowerShell cmdlet Test-Path to avoid unnecessary errors in your scripts caused by things not being where you expect them, or by another part of your script returning a “path” that isn’t valid.So, for example, we can test if $profile exists: Test-Path $...
Of course, if this was something that you would repeatedly do, you should run it from a script, use proper names for the variables, and all those good practices (including transforming the filename in an argument and defining where to send the output, but today, the topic iswhileloops)....
The shell script runs with no syntax errors but fails to execute reliably certain tasks. The most common runtime errors in a shell script include: Division by zero or use of a string/float variable in a Bash Arithmetic Expression Incorrect subscript when dynamically populating a Bash Associative...