Install latest/stable of slashsum

Ubuntu 16.04 or later?

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Install using the command line

sudo snap install slashsum

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Channel Version Published

Details for slashsum

License

  • MIT

Last updated

  • 11 January 2026 - latest/stable

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Fast multi-threaded checksum calculator (CRC32, MD5, SHA1, SHA256, SHA512)

Slashsum calculates 5 different checksums simultaneously using parallel processing.

⚡ FEATURES
• Calculate CRC32, MD5, SHA-1, SHA-256, SHA-512 in one command
• Parallel processing - 5 hashes at the speed of 1
• Large file support (tested with 50GB+ files)
• Save results to .checksum files
• Cross-platform (Linux, Windows, macOS)

🚀 USAGE
slashsum myfile.iso # Calculate checksums
slashsum myfile.iso --save # Save to file.checksum

📊 PERFORMANCE
Calculates 5 checksums in approximately the same time as a single checksum tool, because disk I/O is the bottleneck, not CPU.

🔧 PERMISSIONS
• home: Access files in your home directory
• removable-media: Access USB drives and external disks

INSTALL:

  sudo snap install slashsum  

  # Connect missing permissions  ( if needed) 
  sudo snap connect slashsum:home 
  sudo snap connect slashsum:removable-media 

  hash -r  # Refresh shell path cache  
  slashsum --version

Install slashsum on your Linux distribution

Choose your Linux distribution to get detailed installation instructions. If yours is not shown, get more details on the installing snapd documentation.


Where people are using slashsum

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Ubuntu 24.04