Session and utilities

The sha1sum command

Computes the SHA-1 hash (160 bits) of a file. Stronger than MD5, though SHA-256 is preferred today.

Syntax

sha1sum [archivo...]

Most useful options

-cChecks the checksums listed in a file

Copy-ready examples

$ sha1sum /etc/passwdSHA-1 hash

You can try them in the browser terminal: it does not touch your computer.

Typical mistakes

  • SHA-1 is considered weak for signatures; use it only for basic integrity.

Related commands

sha256summd5sum

FAQ

What is the difference between SHA-1 and SHA-256?

SHA-256 produces a longer hash and is considered secure.

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