tldr/pages/common/sha256sum.md

29 lines
869 B
Markdown
Raw Normal View History

# sha256sum
> Calculate SHA256 cryptographic checksums.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/sha2-utilities.html>.
- Calculate the SHA256 checksum for one or more files:
`sha256sum {{path/to/file1 path/to/file2 ...}}`
2016-01-20 11:45:42 +00:00
- Calculate and save the list of SHA256 checksums to a file:
2016-01-20 11:45:42 +00:00
`sha256sum {{path/to/file1 path/to/file2 ...}} > {{path/to/file.sha256}}`
- Calculate a SHA256 checksum from `stdin`:
`{{command}} | sha256sum`
- Read a file of SHA256 sums and filenames and verify all files have matching checksums:
2021-09-03 20:27:53 +01:00
`sha256sum --check {{path/to/file.sha256}}`
2020-12-18 12:31:59 +00:00
- Only show a message for missing files or when verification fails:
2020-12-18 12:31:59 +00:00
2021-09-03 20:27:53 +01:00
`sha256sum --check --quiet {{path/to/file.sha256}}`
- Only show a message when verification fails, ignoring missing files:
`sha256sum --ignore-missing --check --quiet {{path/to/file.sha256}}`