bash test string equality

Basic syntax for BASH The simplest example of--hello world! About input, output, and error outputs Rules for variables in BASH (similarities and differences with C language) Basic Process Control syntax in BASH Use of

Basic syntax for BASH The simplest example of--hello world! About input, output, and error outputs Rules for variables in BASH (similarities and differences with C language) Basic Process Control syntax in BASH Use of

The simplest example of--hello world! About input, output, and error outputs Rules for variables in BASH (similarities and differences with C language) Basic Process Control syntax in BASH Use of functions 2.1 Simplest example

Shell commonly known as shell (used to distinguish from the kernel), refers to the "user interface to provide users" command parser (software). It is similar to DOS command and later cmd.exe. It receives the user command and then invokes the

1. Linux Scripting Basics 1.1 Basic Introduction to grammar 1.1.1 Start The program must start with the following line (must be on the first line of the file): #!/bin/sh The symbolic #! is used to tell the system that the parameters behind it

Practice:Pass a user name parameter to the script to determine if the user's user name is consistent with the group name of their base group, and the results are displayed.(1)Character test:= =: Test for equality, equality is true, not equal to

Linux under Bash programming character test with For Loop statement (v)1. Character test:= =: Test for equality, equality is true, not equal to False! =: Test Whether it is unequal, not equal to true, etc as false>,=,-N String: Tests whether the

Linux system learning notes: BASH programming uses var (elementelement...) to create array variables. When referencing elements in an array, use $ {var [I]}, I as the subscript, subscript @ to copy the original array, and subscript * to copy the

Bash comparison ClassificationTest method:[Expression][[Expression]Test expressionCommon condition tests in bash:1. Integer Test2. File Test3. String comparison testInteger test:-Eq: test whether two integers are equal. For example, $ A-eq $ B. If

String test:= =: Determine string equality！ =: Judge strings are not equal-N: Tests whether the specified string is empty-S: Tests whether the specified string is not emptyLoop statement:for variable in list; DoLoop bodyDoneExample:For I in 1 2 3 4 5