getfattr, setfattr, sysdig: add page (#13921)

* sysdig

* Add periods and colons

* Modified with recommended changes

* Fix typo

* Attribute

* Made fixes

* Removed spaces

* Newline

* Design changes

* Corrected link and attribute name

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Co-authored-by: Wiktor Perskawiec <git@spageektti.cc>

pages/linux/setfattr.md

@@ -0,0 +1,16 @@
+# setfattr
+
+> Set extended file attributes.
+> More information: <https://manned.org/setfattr>.
+
+- Set name of attribute for file:
+
+`setfattr -n user.{{attribute_name}} {{path/to/file}}`
+
+- Set a user-defined value of an extended attribute on a file:
+
+`setfattr -n user.{{attribute_name}} -v "{{value}}" {{path/to/file}}`
+
+- Remove a specific attribute of a file:
+
+`setfattr -x user.{{attribute_name}} {{path/to/file}}`