xzgrep: add page (#9983)

pages/common/xzgrep.md

@@ -0,0 +1,33 @@
+# xzgrep
+
+> Search possibly compressed files with xz, lzma, gzip, bzip2, lzop, or zstd for regular expressions.
+> See also: `grep`.
+> More information: <https://manned.org/xzgrep.1>.
+
+- Search for a pattern within a file:
+
+`xzgrep "{{search_pattern}}" {{path/to/compressed/file}}`
+
+- Search for an exact string (disables regular expressions):
+
+`xzgrep --fixed-strings "{{exact_string}}" {{path/to/compressed/file}}`
+
+- Search for a pattern in all files showing line numbers of matches:
+
+`xzgrep --line-number "{{search_pattern}}" {{path/to/compressed/file}}`
+
+- Use extended regular expressions (supports `?`, `+`, `{}`, `()` and `|`), in case-insensitive mode:
+
+`xzgrep --extended-regexp --ignore-case "{{search_pattern}}" {{path/to/file}}`
+
+- Print 3 lines of context around, before, or after each match:
+
+`xzgrep --{{context|before-context|after-context}}={{3}} "{{search_pattern}}" {{path/to/file}}`
+
+- Print file name and line number for each match with color output:
+
+`xzgrep --with-filename --line-number --color=always "{{search_pattern}}" {{path/to/file}}`
+
+- Search for lines matching a pattern, printing only the matched text:
+
+`xzgrep --only-matching "{{search_pattern}}" {{path/to/file}}`