In this example the logicalORoperator combines two conditions and only one of them or both can be true for the condition to be overall true and the code to execute. We also demonstrate the-geoperator for greater or equal numeric comparison in the above example. The script is working as exp...
Conditional tests can be performed in Bash Scripting using the "if" statement, where the statement inside the "if" block is executed only if the specified condition is met. How can I check for a existing file in a bash script? Use the if [ -f "file.txt" ]; then command to check ...
‘elif’ is used to define else if condition in bash. Create a file named, ‘elseif_example.sh’ and add the following script to check how else if is defined in bash script. #!/bin/bash echo "Enter your lucky number" read n if [ $n -eq 101 ]; then echo "You got 1st prize"...
if then elif then else fi example: #!/bin/bash count=99 if [ $count -eq 100 ] then echo "Count is 100" elif [ $count -gt 100 ] then echo "Count is greater than 100" else echo "Count is less than 100" fi 4. Bash If..then..else..if..then..fi..fi.. ...
Bash, short for "Bourne Again SHell," is a powerful scripting language used in Unix-based operating systems. One of the fundamental constructs in Bash programming is the if statement. The if statement allows you to control the flow of your script based on specific conditions. In this article...
Using else if statement in bash You can use an elif (else-if) statement whenever you want to test more than one expression (condition) at the same time. For example, the followingage.shbash script takes your age as an argument and will output a meaningful message that corresponds to your...
In this example, the script first checks if ‘a’ is greater than ‘b’. If it’s not, it moves on to the ‘elif’ statement to check if ‘a’ is greater than ‘c’. If neither condition is met, it executes the ‘else’ statement, which in this case, prints ‘a is not greate...
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 the condition possibilities for both the single- and the double-bracket syntax. Save a single exception, th...
If users need to remove unnecessary parts from strings, they can use the Bash string extraction tools. Start by creating a new bash script:nano extractstring.shThe following script has 4 values, 3 of them being strings. In our example, we will extract only the number value. This can be ...
除了上面的./example.sh的方法,另一种运行bash script的方式是bash example.sh。 变量 如果仅仅是想要运行一连串的命令,似乎我手打也行啊,没必要专门写个bash script。这时候,就需要变量了。有了变量,他就可以干很多事了。 变量赋值和其他很多语言很相似(比如python),是一种dynamical typing的方式赋值,而想要调用变...