*sum: update pages to make them consistent (#10136)

* *sum: update pages to make them consistent

* md5sum: fix typo, shasum: change 'the' to 'a' for consistency

pages/common/shasum.md

@@ -1,32 +1,36 @@
 # shasum
 
-> Calculate or check cryptographic SHA checksums.
+> Calculate SHA cryptographic checksums.
 > More information: <https://manned.org/shasum>.
 
-- Calculate the SHA1 checksum for a file:
+- Calculate the SHA1 checksum for one or more files:
 
-`shasum {{path/to/file}}`
+`shasum {{path/to/file1 path/to/file2 ...}}`
 
-- Calculate the SHA256 checksum for a file:
+- Calculate the SHA256 checksum for one or more files:
 
-`shasum --algorithm 256 {{path/to/file}}`
+`shasum --algorithm 256 {{path/to/file1 path/to/file2 ...}}`
 
-- Calculate the SHA512 checksum for multiple files:
+- Calculate the SHA512 checksum for one or more files:
 
-`shasum --algorithm 512 {{path/to/file1}} {{path/to/file2}}`
+`shasum --algorithm 512 {{path/to/file1 path/to/file2 ...}}`
+
+- Calculate a SHA1 checksum from `stdin`:
+
+`{{some_command}} | shasum`
 
 - Calculate and save the list of SHA256 checksums to a file:
 
-`shasum --algorithm 256 {{path/to/file1}} {{path/to/file2}} > {{path/to/file.sha256}}`
+`shasum --algorithm 256 {{path/to/file1 path/to/file2 ...}} > {{path/to/file.sha256}}`
 
-- Check a file with a list of sums against the directory's files:
+- Read a file of SHA1 sums and filenames and verify all files have matching checksums:
 
 `shasum --check {{path/to/file}}`
 
-- Check a list of sums and only show a message for files for which verification fails:
+- Only show a message for missing files or when verification fails:
 
 `shasum --check --quiet {{path/to/file}}`
 
-- Calculate the SHA1 checksum from `stdin`:
+- Only show a message when verification fails, ignoring missing files:
 
-`{{some_command}} | shasum`
+`shasum --ignore-missing --check --quiet {{path/to/file}}`