Exercise 1: Write a bash shell script that checks the length of the string provided to it as an argument. If no argument is provided, it prints 'empty string'. Exercise 2: Write a shell script that checks whether a given file exists or not. You can provide the full file path as the...
Case statement is similar to if statement with multiple elif. case statement in bash script expands the expression and then tries to to find the match with all the patterns. When a match is found then all the statements will be executed till the double semicolon (;;). In case it does n...
Case 语句类似于 if 语句,但带有多个 elif。bash 脚本中的 Case 语句展开表达式,然后尝试找到与所有模式的匹配。当找到匹配时,将执行所有语句,直到双分号 “;;”。如果没有找到匹配,则将执行 “*)” 模式下提到的语句。 Syntax : case expression in pattern1) statements ;; pattern2) statements ;; pattern3...
Shell中判断语句if中-z至-d的意思 - sunny_2015 - 博客园 https://www.cnblogs.com/coffy/p/5748292.html Conditions in bash scripting (if statements) - Linux Academy Blog https://linuxacademy.com/blog/linux/conditions-in-bash-scripting-if-statements/ Table of conditions The following table list ...
Suppose you have this bash script. if [ $(whoami) = 'root' ]; then echo "You are root" else echo "You are not root" fi You can use all the if else statements in a single line like this: if [ $(whoami) = 'root' ]; then echo "root"; else echo "not root"; fi ...
Bash Copy In this example, the script checks if the variable ‘a’ is greater than 5. If the condition is true, it prints ‘a is greater than 5’. Flow Control with ‘Else If’ ‘Else if’, or ‘elif’, adds more flexibility to your conditional statements. It allows you to check ...
In your bash script, you have the flexibility to incorporate multiple if statements as needed. Furthermore, it is entirely possible to nest an if statement within another if statement, creating what is referred to as a nested if statement. ...
Bash Shell Conditional Statements Conditionals let us decide whether to perform an action or not, this decision is taken by evaluating an expression. The most basic form is: if [ expression ]; then statements elif [ expression ]; then
Bash conditional statements perform different computations or actions depending on whether a programmer-specified boolean condition evaluates to true or false. These statements are used to execute different parts of your shell program depending on whethe
This lesson will cover bash scripting, in particular conditional statements using If commands. If statements are used to determine if certain actions are to be taken. Several examples of conditional statements will be provided and explained. Bash: If Bash scripts are used on the Linux operating ...