Check your memory in linux

We all are always worry about memory weather it is main memory, secondary, or other swap
These are few command which help u to debug your memory.

Simple stat.
#free
#du -h
#df -h

Some complex stat.

#cat /proc/meminfo
#dmesg | grep -n kernel

This command give you files have more than 100M usages.

#find / -size +100M -fprintf /root/big.txt '%-10s %p\n'