coreutils: sha1sum invocation
6.6 ‘sha1sum’: Print or check SHA-1 digests
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‘sha1sum’ computes a 160-bit checksum for each specified FILE. The
usage and options of this command are precisely the same as for
‘md5sum’. ⇒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. ⇒sha2
utilities. ⇒b2sum invocation.
Info Catalog
coreutils: md5sum invocation
coreutils: Summarizing files
coreutils: sha2 utilities