if else in shell script example | Conditions in bash scripting (if statements) | Shell Scripts

Here is a simple example of an if-else statement in a shell script: Bash #!/bin/bash # Check if the file "myfile.txt" exists if [ -f myfile.txt ]; then # The file exists echo "The file myfile.txt exists." else # The file does not exist echo "The file myfile.txt does not exist." fi Use code with caution. Learn more This script will check if the file "myfile.txt" exists. If it does, the script will print the message "The file myfile.txt exists." Otherwise, the script will print the message "The file myfile.txt does not exist." Here is another example of an if-else statement in a shell script: Bash #!/bin/bash # Get the current user's name username=$(whoami) # Check if the current user is root if [[ "$username" == "root" ]]; then # The current user is root echo "You are logged in as root." else # The current user is not root echo "You are not logged in as root." fi Use code with caution. Learn more This script will get the current user's name and then check if the current user is root. If the current user is root, the script will print the message "You are logged in as root." Otherwise, the script will print the message "You are not logged in as root." If-else statements can be used to control the flow of your shell scripts. By using if-else statements, you can execute different code depending on the value of a condition.