From 43b056b04db85a00e16421b162ce67cf0073a88d Mon Sep 17 00:00:00 2001
From: Michele Cereda <cereda.michele@gmail.com>
Date: Sun, 17 Apr 2022 23:55:08 +0200
Subject: [PATCH] Added dpkg notes to the knowledge base

---
 knowledge base/linux/debian linux.md |  2 ++
 knowledge base/linux/dkpg.md         | 27 +++++++++++++++++++++++++++
 2 files changed, 29 insertions(+)
 create mode 100644 knowledge base/linux/dkpg.md

diff --git a/knowledge base/linux/debian linux.md b/knowledge base/linux/debian linux.md
index 6bd7cea..feb8d2a 100644
--- a/knowledge base/linux/debian linux.md	
+++ b/knowledge base/linux/debian linux.md	
@@ -3,8 +3,10 @@
 ## Further readings
 
 - The [APT] package manager
+- [Dpkg]
 - [Advice for new users on not breaking their Debian system]
 
 [apt]: apt.md
+[dpkg]: dpkg.md
 
 [advice for new users on not breaking their debian system]: https://wiki.debian.org/DontBreakDebian
diff --git a/knowledge base/linux/dkpg.md b/knowledge base/linux/dkpg.md
new file mode 100644
index 0000000..539044f
--- /dev/null
+++ b/knowledge base/linux/dkpg.md	
@@ -0,0 +1,27 @@
+# Dpkg
+
+## TL;DR
+
+```shell
+# add an extra architecture
+dpkg --add-architecture i386
+
+# list extra architectures
+dpkg --print-foreign-architectures
+
+# list available extra architectures
+dpkg-architecture --list-known
+
+#list all installed packages of the i386 architecture
+dpkg --get-selections | grep i386 | awk '{print $1}'
+
+# remove the i386 architecture
+apt-get purge $(dpkg --get-selections | grep --color=never i386 | awk '{print $1}')
+dpkg --remove-architecture i386
+```
+
+## Further readings
+
+- [How to check if dpkg-architecture --list has all the architectures?]
+
+[how to check if dpkg-architecture --list has all the architectures?]: https://askubuntu.com/questions/852115/how-to-check-if-dpkg-architecture-list-has-all-the-architectures#852120