How can I verify the SHA256 hash of 0.10.3 "Wolfram Warptangent" on Ubuntu?

Question

How can I verify the SHA256 hash published for the official 0.10.3 release matches the file that I downloaded for Linux, 64-bit?

Answer 1

Find the correct download on the official Monero website and go to your downloads folder. Open the terminal and use this command:

sha256sum monero-linux-x64-v0.10.3.0.tar.bz2

If you receive the following output you will know that the hash matches the GPG signed message listing the correct SHA256 sums

f164112bea75dfd3eaaa905d21129820a996bbe6e5d65cb194609c672a71c3fe monero-linux-x64-v0.10.3.0.tar.bz2

Answer 2

Jun Li's answer is correct. You can also use the '-c' (for check) option to sha256sum to verify the hash without manually comparing hash strings, but you have to extract the hash line from the hashes.txt file first, because of this bug.

The steps are:

1. Download the monero-linux-x64-v0.10.3.0.tar.bz2 and hashes.txt files
2. Copy the relevant line from hashes.txt to a separate file. For example use this command in the terminal: grep linux-x64 hashes.txt > linux-hash.txt
3. Run the check command in the same folder as the .bz2 file: sha256sum -c linux-hash.txt . This should print 'OK' if the download is not corrupt.

Answer 3

The hashes.txt file seems to be badly formatted and has 2 spaces between the filename and the hash, making the sha256sum command look for the wrong file (it's prepended with a space). If everything is downloaded into same folder, you can do:

sed 's/ / /g' hashes.txt | sha256sum -c

The sed command fixes the double spaces "on-the-fly".

The output will look something like:

$ sed 's/  / /g' hashes.txt | sha256sum -c
sha256sum: monero-win-x64-v0.10.3.1.zip: No such file or directory
monero-win-x64-v0.10.3.1.zip: FAILED open or read
sha256sum: monero-win-x86-v0.10.3.1.zip: No such file or directory
monero-win-x86-v0.10.3.1.zip: FAILED open or read
sha256sum: monero-mac-x64-v0.10.3.1.tar.bz2: No such file or directory
monero-mac-x64-v0.10.3.1.tar.bz2: FAILED open or read
monero-linux-x64-v0.10.3.1.tar.bz2: OK
sha256sum: monero-linux-x86-v0.10.3.1.tar.bz2: No such file or directory
monero-linux-x86-v0.10.3.1.tar.bz2: FAILED open or read
sha256sum: monero-linux-armv8-v0.10.3.1.tar.bz2: No such file or directory
monero-linux-armv8-v0.10.3.1.tar.bz2: FAILED open or read
sha256sum: monero-linux-armv7-v0.10.3.1.tar.bz2: No such file or directory
monero-linux-armv7-v0.10.3.1.tar.bz2: FAILED open or read
sha256sum: monero-freebsd-x64-v0.10.3.1.tar.bz2: No such file or directory
monero-freebsd-x64-v0.10.3.1.tar.bz2: FAILED open or read
sha256sum: monero-dragonflybsd-x64-v0.10.3.1.tar.bz2: No such file or directory
monero-dragonflybsd-x64-v0.10.3.1.tar.bz2: FAILED open or read
monero-gui-win-x64-v0.10.3.1.zip: OK
sha256sum: monero-gui-mac-x64-v0.10.3.1.tar.bz2: No such file or directory
monero-gui-mac-x64-v0.10.3.1.tar.bz2: FAILED open or read
sha256sum: monero-gui-linux-x64-v0.10.3.1.tar.bz2: No such file or directory
monero-gui-linux-x64-v0.10.3.1.tar.bz2: FAILED open or read
sha256sum: monero-gui-linux-x86-v0.10.3.1.tar.bz2: No such file or directory
monero-gui-linux-x86-v0.10.3.1.tar.bz2: FAILED open or read
sha256sum: WARNING: 22 lines are improperly formatted
sha256sum: WARNING: 11 listed files could not be read