harishkannarao

Copy new files from source to target and skip files if it already exist in target

rsync --dry-run -avzurh --stats --delete --progress /tmp/source/ /tmp/target/

Explanation of flags:

• -a -> Archive mode, preserve the file system properties
• -v -> Verbose output
• -vv -> Higher Verbose output
• -vvv -> Even Higher Verbose output

harishkannarao

Bash Script Example

The following blog post shows a sample bash script covering some inportant aspects in writing a bash script.

Important aspects covered in this script:

• Validate if input arguments are passed
• Parse positional arguments
• Handle parameter values with white space
• Validating the arguments (using regex)
• While loop to iterate through varargs
• Usage of unit functions

harishkannarao

#!/bin/bash

# Make the script to abort if any command fails. Use set +e to change the behaviour and ignore failed command.
set -e

# Uncomment below line to print the commands as it is executed. Useful for debugging. Use set +x to disable debugging.
# set -x

# Function to print usage of the script with different options
function print_usage()