To compare two strings in variablesxandyfor equality, use 要比较变量x和y中的两个字符串是否相等,请使用 if test "$x" = "$y"; then printf '%s\n' "equal" else printf '%s\n' "not equal" fi To test whetherxappears somewhere iny, use 要测试x是否出现在y的某个位置,请使用 case $y in...
When writing Bash scripts you will often need to compare two strings to check if they are equal or not. Two strings are equal when they have the same length and contain the same sequence of characters. This tutorial describes how to compare strings in Bash....
String comparison includes comparing the value of two strings - their length or sequence of characters. Compare strings when checking for certain conditions before proceeding to the next step of the script. This tutorial will teach you how to compare strings using a Bash script. Prerequisites A sy...
Dealing with strings is part of any programming language. Bash shell scripting is no different. Even the syntax is pretty much the same. In this quick tutorial, I’ll show you how to compare strings in Bash shell scripts. Bash string comparison syntax Here is how you compare strings in Bas...
如何SSH到另一台主机并在其上运行几个命令? #!/bin/bash # 先配置SSH的免密,之后执行此脚本 hostname ssh root@10.245.110.69 'hostname; whoami; date' hostname 如何使用IF语句比较字符串的值? #!/bin/bash string1="Hello World!" string2="Hello Bash!" ...
Comparison Operators Comparison operators are used in bash to compare two strings to check if they are equal or not. Here, we will list some comparison operators including, string, and integer operators. Integer Operators Regular Expressions
It is advisable always to check and compare if two strings are equal in a Bash script; this is quite important for different reasons. If two strings are equal in a Bash script, it implies that both strings have the same length and character sequence. The “if” statement is used to chec...
The previous example wasn't sufficient at illustrating the need for whitespaces when using the [ operator, so, let's choose another, more illustrative example. We'll compare two strings that are the same, and expect the script to return "Equal": str1="My String" # Using the "[" operat...
Comparison operators are used in bash to compare two strings to check if they are equal or not. Here, we will list some comparison operators including, string, and integer operators. Integer Operators Operators Explanation -eq is equal to -ne is not equal to -gt is greater than -ge is gr...
compare two values, or they ask a question about one value. Conditional expressions are always between double brackets ([[ ]]), and they either uselogical flagsorlogical operators. For example, there are several logical flags you could use for comparing two integers. If we wanted to see if...