Clear Memory Kali Linux Rolling.

echo 3 > /proc/sys/vm/drop_caches 

Clear Swap Space:

swapoff -a
swapon -a

Check memory used

free -h 

Tutorial Video:

#!/bin/sh
sh -c "free -h && echo 3 > /proc/sys/vm/drop_caches && swapoff -a && swapon -a &&
printf '\n%s\n' ' Done.........' && free -h"

chmod +x file.sh
./file.sh