[Solved] How do I back up and restore my Linux system?

There are several tools and strategies you can use to set up a reliable backup system for your Linux machine. Here are a few options:

1. Rsync: Rsync is a popular open-source utility that allows you to synchronize files between different locations, including local directories, remote servers, and cloud storage services. You can use Rsync to create backups of your important files and directories, and then copy them to an external hard drive, NAS, or cloud storage service.
2. Duplicati: Duplicati is a free and open-source backup software that supports various storage destinations, including Amazon S3, Google Drive, Microsoft Azure, and many others. It also supports encryption and compression, and it can be configured to run automatically at scheduled intervals.
3. Areca Backup: Areca Backup is a free, open-source, and cross-platform backup software that allows you to create backups of your files and directories to various storage locations, including local drives, network shares, and cloud storage services. It also supports encryption and compression.
4. LuckyBackup: LuckyBackup is a free, open-source, and cross-platform backup software that allows you to create backups of your files and directories to various storage locations, including local drives, network shares, and cloud storage services. It also supports encryption and compression.
5. Timeshift: Timeshift is a free, open-source backup software that allows you to create backups of your files and directories to various storage locations, including local drives, network shares, and cloud storage services. It also supports encryption and compression.
6. BackupPC: BackupPC is a free, open-source backup software that allows you to create backups of your files and directories to various storage locations, including local drives, network shares, and cloud storage services. It also supports encryption and compression.

You can try all these opensource tools and see which fits your needs. You didn't specify which Linux distro you are using, but my favorite for Ubuntu-based distros is Timeshift. It is included in Linux Mint by default.