diff --git a/nontech/psycho/people/katunin.txt b/nontech/psycho/people/katunin.txt
index 86bd8bac1..da1ad4636 100644
--- a/nontech/psycho/people/katunin.txt
+++ b/nontech/psycho/people/katunin.txt
@@ -3,6 +3,8 @@ Every Week - besedka (VK)
 to-look
 CommonSense School - Ibragimov - Katunin of 14 parts
     https://www.youtube.com/playlist?list=PLP3Ax9fMqRyZK7SXYJzhKtGj32jQU_Co_
+    p6 of 39:40
+        https://www.youtube.com/watch?v=Uhjd46V5gTM
     p5 of 38:45
         https://www.youtube.com/watch?v=Opf0oYLD0wU
     p4 of 43:40
diff --git a/os/linux/packaging/deb/dpkg.txt b/os/linux/packaging/deb/dpkg.txt
index 49018e011..0d45f296a 100644
--- a/os/linux/packaging/deb/dpkg.txt
+++ b/os/linux/packaging/deb/dpkg.txt
@@ -1,4 +1,6 @@
 dpkg
+    -i <package-file>
+        better use apt install <package-file>
     -L <package>
         list files, installed by package
     -S|--search <pattern>