Update cheatsheets

ptargrep

@@ -0,0 +1,21 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# ptargrep
+
+> Find regular expression patterns in tar archive files.
+> More information: <https://manned.org/ptargrep>.
+
+- Search for a pattern within one or more `tar` archives:
+
+`ptargrep "{{search_pattern}}" {{path/to/file1 path/to/file2 ...}}`
+
+- Extract to the current directory using the basename of the file from the archive:
+
+`ptargrep --basename "{{search_pattern}}" {{path/to/file}}`
+
+- Search for a case-insensitive pattern matching within a `tar` archive:
+
+`ptargrep --ignore-case "{{search_pattern}}" {{path/to/file}}`