Linux command--free

2. Command format:
   

   free [options]

4. Command function:

   Displays system usage and idle memory conditions

6. common options:

       -B   display memory in byte units

   -K   display memory in KB units

       -G   display memory in gigabytes

8. Common examples:

   Example one: Display memory usage, shown in megabytes

   Command: free-m

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Description

• shared: Sum of memory shared by multiple processes

• cached: Memory buffer size for read data

• -/+ Buffers/cache: displaying physical memory allocations at the application's point of view

• swap: Swap partition size
  

Linux command--free