­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ #!/bin/bash RAMUSAGE=$(free | awk '/Mem/{printf("RAM Usage: %d\n"), $3/$2*100}'| awk '{print $3}') if [ "$RAMUSAGE" -ge 80 ]; then echo "CRITICAL: RAM Usage at $RAMUSAGE %" exit 2; elif [ "$RAMUSAGE" -ge 65 ]; then echo "WARNING: RAM Usage at $RAMUSAGE %" exit 1; else echo "OK: RAM Usage at $RAMUSAGE %" fi