Shell Loop Command

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.

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 friendly interactive shell, just like its name, fish is a very friendly shell, highly recommended! Use the command sudo apt install fish to install it. When you are done, run the command fish to switch to fish and exit back to bash. A brief introduction to its advantages: automatic completion, syntax highlighting the automatic completion of bash is only the completion of the full command, the path, if you want to complement the full variable, parameters, etc., usually need to use complex combination ...

Corporate Smartphone Security (C) - Aim at domain controllers and look for Golden Ticket. Before leaving the internal network, we decided to get the hash of the domain controller, especially the Kerberos account (krbtgt) and wanted to create a Golden Ticket *. Golden Ticket refers to the forged TGT (Ticket Granting Ticket). Similarly, the Silver Ticket is a forged TGS (Ticket Granting Server).

Hadoop FAQ 1. What is Hadoop? Hadoop is a distributed computing platform written in Java. It incorporates features errors to those of the Google File System and of MapReduce. For some details, ...

Function Description: Set up shell. Syntax: set&http://www.aliyun.com/zixun/aggregation/37954.html >nbsp; [+-ABCDEFHHKLMNPPTUVX] Supplemental NOTE: The set instruction can set the execution mode of the shell used, and can be set according to different requirements. 　Parameter:-A indicates the modified variable for output to the environment variable. -b& ...

Overview Hadoop on Demand (HOD) is a system that can supply and manage independent Hadoop map/reduce and Hadoop Distributed File System (HDFS) instances on a shared cluster. It makes it easy for administrators and users to quickly build and use Hadoop. Hod is also useful for Hadoop developers and testers who can share a physical cluster through hod to test their different versions of Hadoop. Hod relies on resource Manager (RM) to assign nodes ...

Execline 1.1.2 Starting from this release, the Forx and Forbactickx Exit Loops command uses the same code when the-X option is used. This is useful when a loop test fails. Execline is a good scripting tool for developers who need to handle a large number of scripts, or that can execute many times, or to apply nested environments. Many people write shell scripts with bash, or "sh" (it generally, but not always refer to bash). Other shells also have execute shell scripts ...

Creating a new EC2 AMI from within VMware or from VMDK files I ' ve used VMware for many Perton to allow me to test and develop server configurations and distributions. It's where I ...

Chinese Entrepreneur Club Note: This is MA November 8, 2013 in the Chinese Entrepreneur Club, the director of the Exchange visits Tcl station, "Road Farmers Salon" speech. 　Ma said that the mobile internet age of the operating rules and the PC Internet era is completely different, Tencent without micro-letter, may be a disaster. Ma bluntly, Tencent from Nokia, BlackBerry these once hundreds of billions of dollars of the company's decline to realize that the giant enterprises to always have a sense of crisis, Tencent has set up to defeat the existing product team, micro-letter that is Tencent's internal team competition results. Tencent will let the company ...