File: coreutils.info, Node: sha1sum invocation, Next: sha2 utilities, Prev: md5sum invocation, Up: Summarizing files 6.6 'sha1sum': Print or check SHA-1 digests =========================================== 'sha1sum' computes a 160-bit checksum for each specified FILE. The usage and options of this command are precisely the same as for 'md5sum'. *Note md5sum invocation::. Note: The SHA-1 digest is more reliable than a simple CRC (provided by the 'cksum' command) for detecting accidental file corruption, as the chances of accidentally having two files with identical SHA-1 are vanishingly small. However, it should not be considered secure against malicious tampering: although finding a file with a given SHA-1 fingerprint is considered infeasible at the moment, it is known how to modify certain files, including digital certificates, so that they appear valid when signed with an SHA-1 digest. For more secure hashes, consider using SHA-2, or the newer 'b2sum' command. *Note sha2 utilities::. *Note b2sum invocation::.
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