modified: README.md

README.md

@@ -31,6 +31,7 @@
   - [CLI Diagnostics and System Topology](#cli-diagnostics-and-system-topology)
     - [lspci](#lspci)
   - [sudo](#sudo)
+  - [rsync](#rsync)
 
 ## Distro
 
@@ -381,3 +382,19 @@ ad user to sudo group:
 ```bash
 sudo usermod -aG sudo mf
 ```
+
+### rsync
+
+Rsync is used to efficiently synchronize files by copying only what has changed. It preserves permissions, timestamps, and directory structure (-a), provides readable output (-h), and shows which files are being processed (-v). Identical files are skipped automatically, making repeated syncs fast and incremental. Adding --info=progress2 displays overall transfer progress and speed.
+
+``` bash
+apt install rsync
+```
+
+``` bash
+rsync -avh source target --progress
+
+# example over ssh
+# Note: rsync bust be installed both on source and target.
+rsync -avh ../test_* user@target-address:/home/user/test --progress
+```