diff --git a/README.md b/README.md
index 01a29eb..2a5aedd 100644
--- a/README.md
+++ b/README.md
@@ -16,6 +16,7 @@
     - [static ip](#static-ip)
   - [System Monitoring Utilities](#system-monitoring-utilities)
     - [btop](#btop)
+    - [memory usage by user](#memory-usage-by-user)
   - [Storage](#storage)
     - [Disk Space and Used](#disk-space-and-used)
     - [Physical Disks and Partition](#physical-disks-and-partition)
@@ -207,6 +208,13 @@ sudo /etc/init.d/networking restart
 apt update && apt install btop -y
 ```
 
+#### memory usage by user
+
+``` bash
+ ps -eo user,rss --no-headers \
+  | awk '{mem[$1]+=$2} END {for (u in mem) printf "%-15s %.1f MB\n", u, mem[u]/1024}'
+```
+
 ### Storage
 
 #### Disk Space and Used