command line while loop

Day 4: loop structure (while, do... While, ),... While1. Loop Structure (while, do... While,) 1.1. What is a loop structure In daily life, there will be a lot of things that need to be done repeatedly, such as four seasons of every year, 7 days of

1. Loop Structure (while, do... While,) 1.1. What is a loop structure In daily life, there will be a lot of things that need to be done repeatedly, such as four seasons of every year, 7 days of every week, 3 meals a day, and 50 copies of each

First, Introduction In shell programming, circular commands are used to control the execution of certain statements under certain conditions, with three commonly used loop statements: for, while, and until. While loops and for loops belong to the

A Bash Script: A while loop in the Loop Structure Like other languages, the Bash loop structure also contains the while statement.Basic Structure While condition do loop body done Like the for statement, its loop body is also do... Done structure.

Java cyclic statements-general Linux technology-Linux programming and kernel information. The following is a detailed description. Java loop statements include for, while, and do-while. These statements create what we usually call a loop (loops ).

First, using the For loop structureTarget:This case requires writing a shell script chkhosts.sh that uses a for loop to detect the surviving status of multiple hosts, with the following requirements and instructions:1> Ping Detection of 192.168.4.0/2

In the for loop described earlier, you must first create an element list to determine the number of cycles. However, consider the following example: If you enter "quit", the program will exit, otherwise, convert the characters entered by the user

(1) difference between single and double quotes in the shell?? A= "Www.jfedu.net"?? b= ' $A '? Echo $BComments:?Assign the www.jfedu.net to variable A, assign the contents of variable A to the variable B, print out the result of the variable B, and

One, for commandIn shell programming, sometimes we need to repeat the command until a certain condition is reached, and the bash shell provides a for command that allows you to create a loop that iterates through a series of values, each of which

If Else process judgmentGetpass is not available in pycharm, it can be used in the Command Line window to enter the Python environment.Import GetpassUsername = input ("username:") password = getpass.getpass ("Password:") print