PySum is a free and open source application for GNU / Linux that creates a checksum for a file or checks the integrity of a file by comparing it to the original checksum.
The PySum interface is very simple and compact, ideal for who does not want to make and check a complex process of checksum.
From the created tab, you can select the type of algorithm (MD5, CRC32, sha1, sha224, sha256, sha384, or sha512) to select the file and automatically create a checksum.
On the Verification tab, you can select the file, provide the original checksum, and select the algorithm (any of the foregoing) that it was created with.
PySum is a useful application for those who often transfer their files or verify their integrity after copying them.