rpm: add install package example (#3291)

pages/linux/rpm.md

@@ -10,6 +10,10 @@
 
 `rpm -qa '{{mariadb*}}'`
 
+- Forcibly install a package regardless of currently installed versions:
+
+`rpm -U {{package_name.rpm}} --force`
+
 - Identify owner of a file and show version of the package:
 
 `rpm -qf {{/etc/postfix/main.cf}}`
@@ -20,7 +24,7 @@
 
 - Show scriptlets from an RPM file:
 
-`rpm -qp --scripts {{some.rpm}}`
+`rpm -qp --scripts {{package_name.rpm}}`
 
 - Show changed, missing and/or incorrectly installed files of matching packages: