learn bash scripting online

Scripting for Bash programming until statements and formatted hard disk partitions in Linux (10)1. Summary of circular statement structure1.1.while Statement Enter the Loop statement when the condition is metWhile condition; DoStatementDone1.2.until Statement Enter the Loop statement when the condition is not satisfieduntil conditions; DoStatementDone1.3.for variable in list; DoLoop bodyDone1.4.for ((expres

, in the shell script of the usual term loop.At this point, you press CTRL +z to pause it, and then enter BG to go back into the background.In the case of multitasking, if you want to move the task to the foreground, FG is followed by the task number and the task number can be obtained using the jobs command.9. >>, 2>, 2>> : The above-mentioned directional symbols > and >> denote the meaning of substitution and addition, then there are two symbols which are 2> and 2>> here. Indicate error redire

Tags: Shell linux bash Tutorial script videoThe shell is a bridge between the user and the Unix/linux operating system. The user can either enter command execution or use shell scripting to do more complicated operations.　　In the increasingly perfect GUI today, in the system management and other fields, shell programming still plays a role that can not be ignored. An in-depth understanding and proficiency i

I like a wordThe only-to really learn scripting are to write scriptsThe only way to learn a script is to write a scriptBetter command-line parameter detectione_wrongargs=85 # non-numerical argument (Bad argument format).41 ## case "$" in# "") lines=50;;# *[!0-9]*) echo "Usage: ' basename $ ' lines-to-cleanup";No number in the middle of the argument, invalid argum

seconds, in the shell script of the usual term loop.At this point, you press CTRL +z to pause it, and then enter BG to go back into the background.In the case of multitasking, if you want to move the task to the foreground, FG is followed by the task number and the task number can be obtained using the jobs command.9. >>, 2>, 2>> : The above-mentioned directional symbols > and >> denote the meaning of substitution and addition, then there are two symbols which are 2> and 2>> here. Indicate erro

Break is to jump out of the current loop, and continue is to jump out of the loop and start the new loop again[Email protected] test]#CatDemo.SH #/bin/Bash while true; DoRead-P"Please input number:"x yif((x>9)); ThenContinueelif((y>9)); Then BreakElseZ=$ ((x+y))Echo$zfi DoneEcho "Execution completed!"[email protected] test]#SHDemo.SHPlease input number:1 23Please input number:Ten 2 # $x >9, when the back part of the secondary loop is not executing,

Tags: meaning cond centos7 test cat size pre BER syntax errorNote: The comparison string in the shell can only be used = =, Compare numbers using-eq,-ne,-gt,-ge,-lt,-le, or = =, [[Email protected]SH]$CatNumber_compare.SH #!/bin/bash# script Name: Number_compare.SH#用途: Compare two digit sizesEcho "Please input first number :"Read xEcho "You first number x= $x"Read-P"Please input second number:"yEcho "You second number y= $y"if[$x-eq $y]; Then Echo

Do you want to learn Java? Come to the right place! This article will cover a number of high-quality free resources, including web pages, forums, e-books and quick-check tables.Java is an object-oriented programming language with independent, multi-threaded, secure, dynamic, and robust features. Thanks to its versatile features, Java has become one of the most popular programming languages, allowing you to open up robust applications.Java is at the he

PHP is the scripting language can be embedded into HTML, used for develop web applications. every type of websites can create with the help of this language. this language can run almost on every operating system and platform. java ,. net, Perl and functionsMore are language used for creating websites with its different and useful functionality. PHP language have some popular features and functionality which makes it popularity among developers.