In addition to Weibo, there is also WeChat
Please pay attention
WeChat public account
Shulou
2025-09-21 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Internet Technology >
Share
Shulou(Shulou.com)06/02 Report--
This article mainly explains "how to use the expect command in the shell script". Interested friends may wish to have a look. The method introduced in this paper is simple, fast and practical. Now let the editor take you to learn how to use the expect command in the shell script.
Expect usage
Expect is a good command to complete a series of automated command operations. I have a deep experience of using it every time it is so troublesome to enter a password for ssh login. Most fixed command execution can also be operated and executed through expect, which is very convenient.
For the following example, we use expect to complete a series of operations, including reading real-time logs
#! / usr/bin/expectspawn ssh troot@127.0.0.1set timeout 30expect "password" send "123456" send "\ n" set timeout 5expect ": ~ >" send "sudo su -" send "\ n" expect "~ #" send "tail-200f / var/log/nginx/access.log" send "\ n" interact
Spawn is an internal expect command that can only be executed after entering the expect environment, so first make sure that the environment has expect installed.
Expect, my understanding is a bit similar to if's judgment.
Send is the key to be entered when performing a certain step
Interact guarantees that you will not log in. If you do not, you will exit immediately after execution.
For possible delays in execution, I use timeout to delay execution of commands
Use bash expect with #! / bin/bash/usr/bin/expect
Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.
Views: 0
*The comments in the above article only represent the author's personal views and do not represent the views and positions of this website. If you have more insights, please feel free to contribute and share.
The market share of Chrome browser on the desktop has exceeded 70%, and users are complaining about
The world's first 2nm mobile chip: Samsung Exynos 2600 is ready for mass production.According to a r
A US federal judge has ruled that Google can keep its Chrome browser, but it will be prohibited from
Continue with the installation of the previous hadoop.First, install zookooper1. Decompress zookoope
About us Contact us Product review car news thenatureplanet
More Form oMedia: AutoTimes. Bestcoffee. SL News. Jarebook. Coffee Hunters. Sundaily. Modezone. NNB. Coffee. Game News. FrontStreet. GGAMEN
© 2024 shulou.com SLNews company. All rights reserved.