Shell Script Not Equal

By completing this chapter, you will be able to do the following: Use the while statement to repeatedly execute a piece of code when the condition is true. Use the loop statement to repeatedly execute a piece of code until the condition is true. Use the interactive for statement for loop control. 1. Brief introduction to the loop objective: Repeat the execution of a list of commands. control; a return value based on a key command. Three forms: While ... do ... do loop ... do ... do.

You can use the flexibility inherent in the command shell of Linux to create scripting languages that help you simulate DOS commands in a Linux environment. 　　 　　The specific approach is as follows. If you are an IT support expert, you like the command of Windows very much, when you first use the Linux command line, you may soon find yourself confused. The DOS commands you've been familiar with for a long time don't exist in Linux. So you will find yourself facing a terrible task: to learn and be familiar with the whole ...

The intermediary transaction SEO diagnoses Taobao guest Cloud host technology Hall Everybody Good, I am the A5 security group Jack, today communicates with everybody about the Web server security related question. In fact, in terms of server and site security settings, although I have some experience, but there is no research, so I do this lecture today when the heart is very uncomfortable, always afraid to say wrong will be mistaken for other people's things, there are wrong places also please point out, today is all about the exchange. Perhaps you have a security master or a master of destruction to see what I said ...

Hunting Cloud Net Note: Recent Apple Watch hot abnormal, wearable equipment swept the market, the Disney Magic Wrist strap also take advantage of this trend out of the show.   Think what you think, ahead of the service, the full grasp of the sights, bring people 0 pressure, 0 disturbing experience! This time, Disney makes you feel the Magic legend in the real world! If you are imagining what the future will look like, you might as well come with me and have a vision. A few years later, the mobile phone has been promoted to personal butler, in addition to managing finance, or strong authentication. It has a lot of jobs, and we can get through ...

Is confused, hesitation, complain of E-commerce professional students, you good: This letter is written to the freshmen, but I believe that any level or even graduated from the E-commerce professional students have a role. Every year I can see and hear too many e-commerce majors complaining, yesterday, my alma mater, Xiangtan University, a classmate of electronic commerce and told me that now 07 class freshman was hit very seriously, at the same time, 05, 06 students are also complaining, complain all over the sky, and even a few students have turned professional. In spite of all these years, I have seen no ...

01. On the tip of China 2, "China II on the tip of the tongue" in the April this year, a fire, the mouth-watering food with beautiful pictures and music, so that many viewers tongue reached the point of endurance. And we carefully delve into it, in fact, behind all of this is a copy of the soul in doing a very important role, the following copy June everyone pick the Tongue 2 second episode "Evergreen" part of the copy bar. With 1000 hands, there are 1000 flavors. Chinese cooking is incredibly mysterious and difficult to replicate. From the mountains to the downtown, the culinary teachings still follow the traditional way of mouth and empathy. Wisdom of the ancestors, ...

ubuntu16.04server install dockerCE. Docker is an application that makes it simple and easy to run applications in containers, just like virtual machines, which are only more portable, more resource-friendly, and more dependent on the host operating system. To learn more about the different components of a Docker container, see Docker Ecosystem: An Introduction to Common Components. There are two ways to install Docker on Ubuntu 16.04. One way is to install it on an existing operating system installation. Another way is to use one ...