diff --git a/README.md b/README.md
index 9b854a4..e831703 100644
--- a/README.md
+++ b/README.md
@@ -57,6 +57,8 @@ Notes:
 
 - Be familiar with Bash job management: `&`, **ctrl-z**, **ctrl-c**, `jobs`, `fg`, `bg`, `kill`, etc.
 
+- Know flow control management xon/xoff : ctrl-s, ctrl-q and shift-PageUp, shift-PageDown to navigate the console screen.
+
 - Know `ssh`, and the basics of passwordless authentication, via `ssh-agent`, `ssh-add`, etc.
 
 - Basic file management: `ls` and `ls -l` (in particular, learn what every column in `ls -l` means), `less`, `head`, `tail` and `tail -f` (or even better, `less +F`), `ln` and `ln -s` (learn the differences and advantages of hard versus soft links), `chown`, `chmod`, `du` (for a quick summary of disk usage: `du -hs *`). For filesystem management, `df`, `mount`, `fdisk`, `mkfs`, `lsblk`.