Limit cpu usage

chroot_manager.sh

@@ -342,6 +342,12 @@ add_user () {
 		exit 1
 	fi
 
+	#=================================================
+	# SET LOWER PRIORITY
+	#=================================================
+
+	ssh_chroot_set_priority $user_name
+
 	#=================================================
 	# ADD A PASSWORD FOR THIS USER
 	#=================================================
@@ -459,6 +465,13 @@ remove_user () {
 
 		bold_echo "Delete the user $user_name."
 		sudo userdel $user_name
+
+		#=================================================
+		# REMOVE PRIORITY
+		#=================================================
+
+		ssh_chroot_del_priority $user_name
+
 	done
 }
 

ssh_chroot/ssh_chroot.sh

@@ -50,7 +50,6 @@ ssh_chroot_standard_binaries () {
 	ssh_chroot_copy_binary /usr/lib/openssh/sftp-server "$chroot_dir"
 }
 
-
 # Set permissions
 ssh_chroot_set_permissions () {
 	local chroot_dir="$1"
@@ -77,3 +76,17 @@ ssh_chroot_add_chroot_config () {
 	# Reload ssh service
 	sudo systemctl reload ssh
 }
+
+# Set lower priority
+ssh_chroot_set_priority () {
+	local user="$1"
+	# Set a priority at 10 for this user.
+	# That means, each process started by this user will be less prioritize than all process with a 'nice' under 10.
+	echo "${user} hard priority 10" | sudo tee /etc/security/limits.d/${user}.conf > /dev/null
+}
+
+# Remove priority
+ssh_chroot_del_priority () {
+	local user="$1"
+	sudo rm -f /etc/security/limits.d/${user}.conf
+}