Shell Echo Command

By completing this chapter, you will be able to do the following: Describes the effect of a return value in a conditional branch statement. Use the test command to parse the return value of a command. Use the IF and case structures in a shell program. &http://www.aliyun.com/zixun/aggregation/37954.html ">nbsp;1. Return value shell variable"? "To save the return value of the last executed command: 0: ...

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.

8.if statement syntax: (for one-way Judgment branch) if list A then list B fi Example: if Test-s funfile then echo funfile exists fi echo Hello if structure is a value based on command return Process Control mode. If the test command returns a value of 0, a specified list of commands is executed, and if the command returned with a value other than 0, the specified command list is ignored ...

The 7.for statement loops through each entry in the list, giving Var the next entry in the list each time the loop completes, until the end of the last entry is completed. Syntax: example: for VAR in list $ cat Test_fordo For X in 1 2 3 4 5 list A Dodone ...

The PHP shell is a shell that overwrites the PHP script. You can use it to execute arbiritary shell commands, or browse your remote http://www.aliyun.com/zixun/aggregation/17117.html ">web file system on the server." In a way, you can replace a normal Telnet connection that can use PS to manage and maintain your Web site. PHP Shell 2.3 This version ...

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 ...

Familiarity with the command line interface is significant to the use and management of Linux operating systems. This chapter describes the knowledge of shell operations in the Red Flag Linux http://www.aliyun.com/zixun/aggregation/16493.html >desktop 6.0 system, including file and directory operations, Document and System Management and maintenance, process control, equipment management and other basic content. 8.1.1 Shell profile ...

Windows server http://www.aliyun.com/zixun/aggregation/19058.html ">2003 is the most widely used server operating system currently introduced by Microsoft. Initially, the product was called "Windows. NET Server", originally called "Windows. NET Server 2003", and later changed to "Windows. NET Server 2003", which was eventually changed ...

Intermediary transaction http://www.aliyun.com/zixun/aggregation/6858.html ">seo diagnose Taobao guest cloud host technology Hall after we installed the Web service management system WDCP, In the use of the process may appear in such or such a doubt, the following for everyone to organize the time out, convenient for everyone to learn. 　　Also do not know the words, you can go to the Wdlinux forum to find relevant tutorials. How to modify the interface or template of the WDCP system ...

Intermediary transaction http://www.aliyun.com/zixun/aggregation/6858.html ">seo diagnose Taobao guest cloud host technology Hall with the database in the construction of the continuous application of the site, the vast majority of sites have been inseparable from the database support , because the database can store not only information such as site content, but also information submitted by users. 　　Since this information is invaluable, it is almost impossible to recover once it is lost. All webmaster should not only pay attention to backup ...