diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..f93ba12
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,6 @@
+CMakeCache.txt
+CMakeFiles/
+Makefile
+cmake_install.cmake
+install_manifest.txt
+screen-cpu-usage
diff --git a/screen-mem-usage b/screen-mem-usage
index 2aa2b4a..a4a9bee 100755
--- a/screen-mem-usage
+++ b/screen-mem-usage
@@ -1,9 +1,9 @@
 #!/bin/sh
 
-total_mem=$(/usr/bin/free -m | /usr/bin/awk '$1 == "Mem:" { print $2 }')
+total_mem=$(/usr/bin/free -tm | /usr/bin/awk '$1 == "Mem:" { print $2 }')
 
 while(true); do
-  current_mem=$(/usr/bin/free -m | /usr/bin/awk '$1 == "-/+" { print $3 }')
+  current_mem=$(/usr/bin/free -tm | /usr/bin/awk '$1 == "Mem:" { print $3 }')
   echo "${current_mem}MB/${total_mem}MB"
   sleep 3
 done