Linux script for system backup

Linux script for system backup

Creating a backup script involves a few steps and can vary depending on your requirements, such as what to save and where to store the backups. Here's a simple example of a backup script that creates a compressed archive of selected directories and places them in a backup folder.

Keep in mind that this script is just a simple example. You should adjust it for your own needs, like choosing which directories to back up and where to save the backups. You could also think about using a tool like cron to automatically run the script for scheduled backups.

#!/bin/bash

# Define backup directories and locations
backup_dir="/path/to/backup/folder"
source_dirs=("/path/to/source1" "/path/to/source2")

# Create a timestamp for the backup
timestamp=$(date +"%Y%m%d%H%M%S")
backup_file="backup_$timestamp.tar.gz"

# Create the backup directory if it doesn't exist
mkdir -p "$backup_dir"

# Create a compressed tarball containing the specified directories
tar -czvf "$backup_dir/$backup_file" "${source_dirs[@]}"

# Check if the backup was successful
if [ $? -eq 0 ]; then
  echo "Backup completed successfully. Backup stored in: $backup_dir/$backup_file"
else
  echo "Backup failed."
fi

Here's a breakdown of how this script works:

  1. Set the backup_dir variable to specify the folder where backups will be stored.

  2. Define the source_dirs array to list the directories you want to back up.

  3. Create a timestamp to include in the backup file's name. This ensures that each backup has a unique name.

  4. Create the backup directory if it doesn't exist.

  5. Use tar to create a compressed archive (tarball) of the specified directories. The -czvf options stand for "create," "compress," "verbose," and "file."

  6. Check the exit status of the tar command. If it's successful (exit code 0), print a success message. Otherwise, print an error message.

Don't forget to change this script by using your real directory paths instead of /path/to/backup/folder and /path/to/sourceX. You can also improve this script by adding features like automatically deleting old backups or sending backups to other places.

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