diff --git a/pages/linux.server.md b/pages/linux.server.md
index fca94ef..ca85248 100644
--- a/pages/linux.server.md
+++ b/pages/linux.server.md
@@ -39,6 +39,7 @@
 - https://twitter.com/amilajack/status/1479328649820000256?s=20
 - `exa`, `htop` (samozrejme), a pouzivaval jsem `duf` . `zoxide`
 - https://github.com/ibraheemdev/modern-unix
+- https://www.geeksforgeeks.org/tree-command-unixlinux/
 
 ### media and streaming
 - plex - https://www.plex.tv/