Command for Memory Monitoring

The free command can be used to monitor memory usage.

Command output example:

# free -g
total        used        free      shared  buff/cache   available
Mem:            251          44           1           0         205         205
Swap:             7           0           7

Parameter description:

Parameter	Description
total	The amount of memory. total = used + free + buff/cache
used	The amount of used memory.
free	The amount of free memory.
shared	The amount of shared memory.
buff/cache	The amount of memory used as buffers and cache.
available	The amount of available memory. available = free + buff/cache