b2sum, md5sum, sha*sum: add --ignore-missing example (#7929)

pages/common/b2sum.md

@@ -11,10 +11,18 @@
 
 `b2sum {{path/to/file1}} {{path/to/file2}}`
 
+- Calculate the BLAKE2 checksum from stdin:
+
+`{{some_command}} | b2sum`
+
 - Read a file of BLAKE2 sums and filenames and verify all files have matching checksums:
 
-`b2sum -c {{path/to/file.b2}}`
+`b2sum --check {{path/to/file.b2}}`
 
-- Calculate the BLAKE2 checksum from stdin:
+- Only show a message for missing files or when verification fails:
 
-`{{some_command}} | b2sum`
+`b2sum --check --quiet {{path/to/file.b2}}`
+
+- Only show a message for files for which verification fails, ignoring missing files:
+
+`b2sum --ignore-missing --check --quiet {{path/to/file.b2}}`

pages/common/md5sum.md

@@ -11,10 +11,18 @@
 
 `md5sum {{path/to/file1}} {{path/to/filen2}}`
 
+- Calculate a MD5 checksum from the standard input:
+
+`echo "{{text}}" | md5sum`
+
 - Read a file of MD5SUMs and verify all files have matching checksums:
 
-`md5sum -c {{path/to/file.md5}}`
+`md5sum --check {{path/to/file.md5}}`
 
-- Calculate a MD5 checksum from the standard input:
+- Only show a message for missing files or when verification fails:
 
-`echo "{{text}}" | md5sum`
+`md5sum --check --quiet {{path/to/file.md5}}`
+
+- Only show a message for files for which verification fails, ignoring missing files:
+
+`md5sum --ignore-missing --check --quiet {{path/to/file.md5}}`

pages/common/sha1sum.md

@@ -19,6 +19,10 @@
 
 `sha1sum --check {{path/to/file.sha1}}`
 
-- Only show a message for files for which verification fails:
+- Only show a message for missing files or when verification fails:
 
 `sha1sum --check --quiet {{path/to/file.sha1}}`
+
+- Only show a message for files for which verification fails, ignoring missing files:
+
+`sha1sum --ignore-missing --check --quiet {{path/to/file.sha1}}`

pages/common/sha224sum.md

@@ -19,6 +19,10 @@
 
 `sha224sum --check {{path/to/file.sha224}}`
 
-- Only show a message for files for which verification fails:
+- Only show a message for missing files or when verification fails:
 
 `sha224sum --check --quiet {{path/to/file.sha224}}`
+
+- Only show a message for files for which verification fails, ignoring missing files:
+
+`sha224sum --ignore-missing --check --quiet {{path/to/file.sha224}}`

pages/common/sha256sum.md

@@ -19,6 +19,10 @@
 
 `sha256sum --check {{path/to/file.sha256}}`
 
-- Only show a message for files for which verification fails:
+- Only show a message for missing files or when verification fails:
 
 `sha256sum --check --quiet {{path/to/file.sha256}}`
+
+- Only show a message for files for which verification fails, ignoring missing files:
+
+`sha256sum --ignore-missing --check --quiet {{path/to/file.sha256}}`

pages/common/sha384sum.md

@@ -19,6 +19,10 @@
 
 `sha384sum --check {{path/to/file.sha384}}`
 
-- Only show a message for files for which verification fails:
+- Only show a message for missing files or when verification fails:
 
 `sha384sum --check --quiet {{path/to/file.sha384}}`
+
+- Only show a message for files for which verification fails, ignoring missing files:
+
+`sha384sum --ignore-missing --check --quiet {{path/to/file.sha384}}`

pages/common/sha512sum.md

@@ -19,6 +19,10 @@
 
 `sha512sum --check {{path/to/file.sha512}}`
 
-- Only show a message for files for which verification fails:
+- Only show a message for missing files or when verification fails:
 
 `sha512sum --check --quiet {{path/to/file.sha512}}`
+
+- Only show a message for files for which verification fails, ignoring missing files:
+
+`sha512sum --ignore-missing --check --quiet {{path/to/file.sha512}}`