Etcher is a powerful open-source utility for flashing operating system images to USB drives and SD cards. With its simple interface and streamlined workflow, Etcher makes it easy to write .iso and .img files to storage media in just a few clicks.
In this comprehensive guide, I‘ll walk you through the entire process of getting Etcher running on a Linux system from start to finish. We‘ll cover:
- Downloading and verifying the Etcher package
- Installing dependencies
- Setting up permissions
- Launching the app
- Using Etcher to flash OS images
- Customizing program settings
- Troubleshooting issues
Whether you‘re a Linux novice or a seasoned pro, you‘ll learn everything you need to know to get Etcher configured and start putting distros on thumb drives right away. Let‘s get started!
Downloading and Verifying Etcher
First things first, we need to grab the latest Etcher release for Linux from the official website. Head over to https://www.balena.io/etcher/ in your browser of choice.
You‘ll see download links for Windows, Mac OS, and Linux – click the yellow Linux button to save the file. Make sure to choose the 64-bit version if given the option.
In most cases, this will download a compressed ZIP archive called etcher-electron-x.x.x-linux-x64.zip where x.x.x is the application version number. I recommend saving this file to your Downloads folder for easy access.
Before we install, it‘s good practice to verify the file integrity to ensure the download completed properly without errors.
On Linux, we can check file hashes from the command line. Open a terminal window and run:
cd ~/Downloads
sha256sum etcher-electron-x.x.x-linux-x64.zip
This will output a string of numbers and letters representing the SHA256 hash of the Etcher ZIP package. Copy this entire hash string.
Next, go back to https://www.balena.io/etcher/ in your browser and click the "Checksums" link at the bottom of the Linux download box.
This will open a page listing the latest hashes for each Etcher release file. Scroll down and find the SHA256 hash for the file you just downloaded – it should exactly match the hash from your terminal.
If the hashes match, great! We know the download fully completed and the file is authentic. If not, delete the file and re-download until the hashes line up.
Okay, with the ZIP file downloaded and verified, we‘re ready to install.
Installing Dependencies
To function properly, Etcher relies on some additional system libraries and packages being present on the host Linux machine.
On Debian, Ubuntu, Linux Mint and related distros, we can grab the necessary dependencies from the main software repositories.
Open a terminal window and run:
sudo apt update
sudo apt install libgtk2.0-0 libgtk-3-0 libgbm-dev libnotify-dev libgconf-2-4 libnss3 libxss1 libasound2 libxtst6 xdg-utils
This will update APT‘s package index and install all of the required support libraries in one shot. Type your user password when prompted.
On Fedora Workstation and other RPM-based distributions, use these commands instead:
sudo dnf upgrade --refresh
sudo dnf install gtk2 gtk3 gbm gconf-editor libappindicator nss libxscrnsaver alsa-lib libXtst
And for Arch Linux, Manjaro or derivatives, install the dependencies with:
sudo pacman -Syu
sudo pacman -S gtk2 gtk3 libgl libgconf libnotify nss libxss alsa-lib libxtst
Once the packages are installed, logout and log back in for changes to take effect. Etcher should now have everything it needs to run properly.
Setting Up Permissions
By default, regular users don‘t have access to directly mount or interact with external drives on Linux without elevated privileges. But we want to be able to use Etcher as a normal user.
To allow this, we need to add our account to the "disk" group. Open a new terminal and type:
sudo usermod -aG disk $USER
We‘ll also create a custom udev rule to give users in the disk group full read/write permissions on removable media like USB drives or SD cards.
Create a new file with sudo privileges:
sudo nano /etc/udev/rules.d/10-local-storage.rules
Paste in the following rule syntax:
SUBSYSTEM=="block",ENV{ID_BUS}=="usb|mmc",GROUP="disk",MODE="0660"
Save the file by pressing Ctrl + X then Y and confirm with Enter.
For the new permissions to apply, either reboot your system or run:
sudo udevadm control --reload-rules
sudo udevadm trigger
Now when you insert a flash drive or memory card, regular users in the disk group like your main account should have read/write access automatically thanks to the new udev rule.
Launching Etcher
With the dependencies installed and permissions configured, we‘re finally ready to launch Etcher.
First, extract the ZIP archive you downloaded earlier. Open a terminal in the Downloads folder and run:
unzip etcher-electron-x.x.x-linux-x64.zip
This will unpack the contents into a new etcher-electron folder containing the Etcher binary.
Instead of keeping this folder in Downloads, let‘s move it somewhere more fitting like /opt. This keeps third-party apps neatly sandboxed in the filesystem.
sudo mv etcher-electron /opt/
Now navigate into the Etcher folder and execute the app:
cd /opt/etcher-electron
./etcher
If everything is set up correctly, the Etcher GUI should launch!
The first time opening Etcher, you‘ll get a firewall prompt – click Allow to let the app communicate through your system firewall.
Awesome! With Etcher now running properly, let‘s walk through using it to flash an OS image.
Using Etcher to Flash OS Images
The Etcher UI consists of just three main screens – Select Image, Select Drive, and Flash. We‘ll step through each one.
On the Select Image screen, click the folder icon to browse your filesystem and choose an OS image file (in ISO or IMG format) to flash. I‘ll demonstrate with the latest Ubuntu desktop image.
Next, plug the target USB drive or SD card into your computer. Etcher will automatically detect removable media – you should see your device appear under Select Drive.
Verify capacity details to ensure the correct target is selected. Here I‘m flashing my 16GB USB stick – perfect for a portable Ubuntu install.
Finally, hit the Flash button! This will show a warning that all data on the drive will be erased. Click Yes to confirm and begin the flashing process.
Once underway, a progress bar tracks status as Etcher writes the image file byte-for-byte onto the storage device. Additional runtime details are shown in the log below.
Flashing performance varies based on your hardware, but usually completes in just a few minutes for compact OS images.
When finished, Etcher will display a screen showing write speed statistics and notify you the selected drive is ready to use.
Eject the USB or SD card and it‘s now bootable and loaded with your operating system of choice – thanks to the magic of Etcher!
Customizing Etcher Settings
Beyond basic image flashing duties, Etcher provides a few useful configuration options accessible in the app menu.
Click the gear icon in the upper-right to open the settings panel:
Here you can toggle a few self-explanatory flags:
- Validate write on success – Double-checks data was written correctly after flashing finishes. Useful if your SD cards or drives are problematic, but disabling can significantly speed up the process.
- Confirm before writing – Shows the warning dialog before physically flashing each drive during multi-drive operations, giving a chance to cancel on a per-device basis.
- Show all drives – Displays unmountable and system drives that are normally hidden from the drive selection screen.
Changes to settings are applied immediately. Feel free to tweak based on your needs!
I recommend leaving validation enabled unless you find it too slow. But disabling the confirmation dialog can be handy for production workloads.
Troubleshooting Etcher Issues
While Etcher is generally straightforward to install and operate, you may encounter hiccups now and then. Here are some common problems and potential solutions.
Etcher crashes on launch – This points to a missing dependency or library. Double check the list above and verify gtk, gbm, libnotify etc are all present at required versions. Also try reinstalling Etcher.
No drives appearing – Your user likely lacks permissions to access storage devices directly. Confirm you are in the disk group and reboot, or follow the udev rule instructions again.
Drive errors when validating – Try a different, higher-quality USB drive or SD card. Poor storage media can result in flash corruption issues. Disabling validation may also help in a pinch.
For additional troubleshooting tips, the Etcher documentation at https://etcher.io/docs is quite helpful. Be sure to check your specific Linux distribution‘s forums as well.
If problems persist, you can always open a support ticket and the Etcher development team is usually very responsive.
That covers everything you need to get the Etcher SD card flash utility up and running on Linux!
While the install process might seem lengthy at first glance, much is optional depending on your needs. At minimum, you just need to:
- Download and extract the Etcher binary
- Install GTK and related libraries
- Launch the app
Optionally making life easier with user groups and custom udev rules.
I highly recommending keeping Etcher in your Linux toolbox – it takes the headache out of finicky CLI flashing commands. The simple UI paired with robust error-checking works great for novices and old hats alike.
Let me know in the comments if you have any other questions on using Etcher! I‘m happy to help out.
