diff --git a/pages/linux/aptitude.md b/pages/linux/aptitude.md
index 8c8f8c53ca..9855eab001 100644
--- a/pages/linux/aptitude.md
+++ b/pages/linux/aptitude.md
@@ -14,6 +14,10 @@
 
 `aptitude search {{package}}`
 
+- Search for an installed package (`?installed` is an aptitude search term):
+
+`aptitude search '?installed({{package}})'`
+
 - Remove a package and all packages depending on it:
 
 `aptitude remove {{package}}`
@@ -25,3 +29,7 @@
 - Upgrade installed packages (like `aptitude upgrade`) including removing obsolete packages and installing additional packages to meet new package dependencies:
 
 `aptitude full-upgrade`
+
+- Put an installed package on hold to prevent it from being automatically upgraded:
+
+`aptitude hold '?installed({{package}})'`