通过使用不同的数据运行脚本来验证脚本: Example of running bash script with logical operators in if statement ️ 练习时间 让我们做一些练习吧 练习1:编写一个 Bash Shell 脚本,检查作为参数提供给它的字符串的长度。如果未提供参数,它将打印 “empty string”。 练习2:编写一个 Shell 脚本来检查给定文件是...
Example of running bash script with logical operators in if statement 🏋️ 练习时间 让我们做一些练习吧 😃 练习1:编写一个 Bash Shell 脚本,检查作为参数提供给它的字符串的长度。如果未提供参数,它将打印 “empty string”。 练习2:编写一个 Shell 脚本来检查给定文件是否存在。你可以提供完整的文件路...
Simple logical operators in BASH; Unix Boolean Operators ( &&, -a, ||, -o ); $( cd "$( dirname ${0} )" && pwd )脚本源文件目录 Getting the source directory of a Bash script from within【@stackoverflow】; How do I determine the location of my script? I want to read some config...
Q1. Can I have multiple conditions in a single if statement? A1. Yes, you can combine multiple conditions using logical operators such as && (AND) and || (OR) to create compound conditions within a single if statement. Q2. Can I use the if statement to check the existence of a file...
Arithmetic Comparison Operators Start String Comparison Operators Start Logical Operators Start File Test Operators Start Downloadable Resources Start Operators - Assignment#1 Start Customizing Shell Environment 7 Lessons Overview Start Shell Prompt Customization Start Bash Shell Specia...
How to program with Bash: Logical operators and shell expansions 5 ways to improve your Bash scripts Getting started with shell scripting 10 basic Linux commands you need to know Linux environment variable tips and tricks [ Want to try out Red Hat Enterprise Linux?Download it nowfor free. ] ...
How to program with Bash: Logical operators and shell expansions How to program with Bash: Loops About the author David Both David Both is an open source software and GNU/Linux advocate, trainer, writer, and speaker who lives in Raleigh, NC. He is a strong ...
If command 1 returns a “0” error code, then command 2 will run; otherwise, the script stops. Using the semicolon operator (;) This operator works in the opposite manner as the “&&” operator. The semicolon operator, when introduced in bash chain commands, will allow subsequent commands...
File Test Operators Here, we will list some helping testing operators for permissions, size, date, file type, or existence in the bash script. 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 compari...
In this case, we employ-gtto check if the length of thestrvariable is greater than6. Then, we use the&∧||logical operators to printvalidif the test exits successfully, orinvalidif the test fails. 3. Usingexpr length Another approach is to compute the length of a variable usingexpr: ...