tail: add page (#7688)

pages/osx/tail.md

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+# tail
+
+> Display the last part of a file.
+> See also: `head`.
+> More information: <https://manned.org/man/freebsd-13.0/tail.1>.
+
+- Show last 'count' lines in file:
+
+`tail -n {{count}} {{path/to/file}}`
+
+- Print a file from a specific line number:
+
+`tail -n +{{count}} {{path/to/file}}`
+
+- Print a specific count of bytes from the end of a given file:
+
+`tail -c {{count}} {{path/to/file}}`
+
+- Print the last lines of a given file and keep reading file until `Ctrl + C`:
+
+`tail -f {{path/to/file}}`
+
+- Keep reading file until `Ctrl + C`, even if the file is inaccessible:
+
+`tail -F {{path/to/file}}`
+
+- Show last 'count' lines in 'file' and refresh every 'seconds' seconds:
+
+`tail -n {{count}} -s {{seconds}} -f {{path/to/file}}`