Simple linux ressource usage logging

.gitignore

*

ressource-log.sh

#!/bin/bash     

# timestamp
echo -n `date "+%d/%m/%Y %H:%M:%S"` ";" 

# cpu
echo -n `top -b -n1 | grep "Cpu(s)" | awk '{print $2 + $4}'` ";" 

free > /tmp/free
# Used RAM
echo -n `cat /tmp/free | grep Mem | sed -e "s/\s\{1,\}/ /g" | cut -f3 -d' '` ";"
# RAM used by kernel for caching
echo -n `cat /tmp/free | grep cache: | sed -e "s/\s\{1,\}/ /g" | cut -f4 -d' '` ";"
rm /tmp/free

# hdd
echo `df -lh | awk '{if ($6 == "/") { print $5 }}' | head -1 | cut -d'%' -f1` ";"