chat> How can I use rsync to make a duplicate of a USB drive?
**Prerequisites:**
* Two USB drives, one to be copied (source) and the other to be copied to (destination).
* A computer with both USB drives connected and rsync installed.
**Steps:**
**1. Check for rsync:**
* Open a terminal window or command prompt.
* Type `rsync --version` to verify that rsync is installed.
**2. Connect the USB drives:**
* Make sure both USB drives are connected to the computer.
**3. Identify the USB drive paths:**
* Use the `lsblk` command to list all block devices and identify the paths to the USB drives.
* For example, if the source USB drive is connected to `/dev/sdb` and the destination USB drive is connected to `/dev/sdc`, the paths would be `/dev/sdb` and `/dev/sdc` respectively.
**4. Run rsync command:**
* Type the following command in the terminal, replacing `/path/to/source` with the source USB drive path and `/path/to/destination` with the destination USB drive path:
```
rsync -av /path/to/source /path/to/destination
```
**Example:**
```
rsync -av /dev/sdb /dev/sdc
```
* **-a:** Preserves permissions, ownership, timestamps, and other attributes.
* **-v:** Provides verbose output during the transfer.
**5. Wait for completion:**
* rsync will begin copying files from the source drive to the destination drive. The time it takes will depend on the size of the drive and the speed of the connection.
**6. Verify the duplicate:**
* Once the transfer is complete, you can use the `diff` command to verify that the two USB drives are identical:
```
diff /path/to/source /path/to/destination
```
If the output is empty, it means the two USB drives are identical.
**Additional Notes:**
* You can use the `--progress` option to display a progress bar during the transfer.
* If the source drive has bad sectors, rsync will attempt to skip them and continue copying the rest of the files.
* If you want to exclude certain files or directories, use the `--exclude` option followed by a pattern. For example: `--exclude *.tmp`
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