Update cheatsheets

sha224sum

@@ -0,0 +1,33 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# sha224sum
+
+> Calculate SHA224 cryptographic checksums.
+> More information: <https://www.gnu.org/software/coreutils/manual/html_node/sha2-utilities.html>.
+
+- Calculate the SHA224 checksum for one or more files:
+
+`sha224sum {{path/to/file1 path/to/file2 ...}}`
+
+- Calculate and save the list of SHA224 checksums to a file:
+
+`sha224sum {{path/to/file1 path/to/file2 ...}} > {{path/to/file.sha224}}`
+
+- Calculate a SHA224 checksum from `stdin`:
+
+`{{command}} | sha224sum`
+
+- Read a file of SHA224 sums and filenames and verify all files have matching checksums:
+
+`sha224sum --check {{path/to/file.sha224}}`
+
+- Only show a message for missing files or when verification fails:
+
+`sha224sum --check --quiet {{path/to/file.sha224}}`
+
+- Only show a message when verification fails, ignoring missing files:
+
+`sha224sum --ignore-missing --check --quiet {{path/to/file.sha224}}`