Fabrice Quenneville
c66d6a3213
- Added detailed instructions for checking and managing USB devices - Included commands for: - Viewing system information related to USB devices - Identifying mount points and device information - Checking filesystem and data integrity - Testing for bad blocks and running SMART diagnostics - Benchmarking read speed and safely removing devices This commit provides a comprehensive guide for handling USB devices in Linux environments.
110 lines
2.0 KiB
Markdown
110 lines
2.0 KiB
Markdown
# Linux
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## Table of Contents
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- [Linux](#linux)
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- [Table of Contents](#table-of-contents)
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- [Basic Commands](#basic-commands)
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- [USB Devices](#usb-devices)
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- [Test USB Key](#test-usb-key)
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## System information
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## Basic Commands
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## USB Devices
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### Test USB Key
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**Device Information**
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Check if the system recognizes the device and show the latest system messages related to USB devices being connected.
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```bash
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lsusb
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dmesg | tail -n 20
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```
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**Find Mount Points and Device Information**
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Identify mount points, partitions, and other relevant details of mounted devices.
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```bash
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lsblk -f
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df -h | grep /dev/sdc
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findmnt /dev/sdc1
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mount | grep /dev/sd
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```
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**Print Detailed Information About the USB Key**
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View detailed partition and disk information.
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```bash
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fdisk -l /dev/sdc
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```
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**Test the File System**
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Check and repair the filesystem on the USB key.
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```bash
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fsck /dev/sdc1
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```
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**Test Data Integrity**
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Perform read/write tests to ensure the integrity of the USB key.
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1. **Unmount the USB Key** (if mounted):
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```bash
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umount /media/fabrice/BD48-F8BB
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```
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2. **Write Test**:
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```bash
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dd if=/dev/zero of=/dev/sdc bs=4M count=256 status=progress
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```
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3. **Read Test**:
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```bash
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dd if=/dev/sdc of=/dev/null bs=4M count=256 status=progress
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```
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**Check for Bad Blocks**
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Identify any bad sectors on the USB key.
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- **Read-only test**:
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```bash
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badblocks -v /dev/sdc
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```
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- **Non-destructive read-write test**:
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```bash
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badblocks -nsv /dev/sdc
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```
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- The -n option performs a non-destructive read-write test.
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- The -s option shows progress.
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- The -v option is for verbose output.
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**Perform a SMART Test**
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Run SMART diagnostics to test the health of the USB key.
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1. **Start a short SMART test**:
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```bash
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smartctl -t short /dev/sdc
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```
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2. **View test results**:
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```bash
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smartctl -a /dev/sdc
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```
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**Benchmark the Speed**
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Measure the read speed of the USB key.
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```bash
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hdparm -t /dev/sdc
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```
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**Unmount and Safely Remove**
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Unmount the USB key and safely remove it from the system.
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```bash
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umount /mnt/usb
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eject /dev/sdc
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```
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