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sha256sum

 
Calculate SHA256 cryptographic checksums. More information: https://www.gnu.org/software/coreutils/manual/html_node/sha2-utilities.html.
 
  • Calculate the SHA256 checksum for a file:
     
    sha256sum {{path/to/file}}
     
  • Calculate SHA256 checksums for multiple files:
     
    sha256sum {{path/to/file1}} {{path/to/file2}}
     
  • Calculate and save the list of SHA256 checksums to a file:
     
    sha256sum {{path/to/file1}} {{path/to/file2}} > {{path/to/file.sha256}}
     
  • Read a file of SHA256 sums and verify all files have matching checksums:
     
    sha256sum --check {{path/to/file.sha256}}
     
  • Only show a message for missing files or when verification fails:
     
    sha256sum --check --quiet {{path/to/file.sha256}}
     
  • Only show a message for files for which verification fails, ignoring missing files:
     
    sha256sum --ignore-missing --check --quiet {{path/to/file.sha256}}

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