Bugfix for computing free memory on newer systems

Author: Eliot Eshelman

etc/microway/interactive_screenrc.conf

@@ -39,7 +39,7 @@
 backtick 1 60 60 ${SLURM_PATH}/squeue --noheader --jobs=${SLURM_JOB_ID} --format="%L"
 
 # Define backtick ID #2 to show CPU usage and available memory
-backtick 2 60 60 bash -ic "echo 'Load: '; cut -f1 -d' ' /proc/loadavg; echo ', '; free -m | awk '/buffers[/]cache/ {print \$4}'; echo 'MB free'"
+backtick 2 60 60 bash -ic "echo 'Load: '; cut -f1 -d' ' /proc/loadavg; echo ', '; awk '/MemAvailable:|\^MemFree:|\^Buffers:|\^Cached:/ {if (\$1 == \"MemAvailable:\") {sum=\$2; exit;} else {sum+=\$2}} END {print sum/(1024*1024)}' /proc/meminfo; echo ' GB free'"
 
 
 # Configure the status bar at the bottom of the screen session