1e41f4b71Sopenharmony_ci# free 2e41f4b71Sopenharmony_ci 3e41f4b71Sopenharmony_ci 4e41f4b71Sopenharmony_ci## Command Function 5e41f4b71Sopenharmony_ci 6e41f4b71Sopenharmony_ciThis command is used to display the memory usage in the system. 7e41f4b71Sopenharmony_ci 8e41f4b71Sopenharmony_ci 9e41f4b71Sopenharmony_ci## Syntax 10e41f4b71Sopenharmony_ci 11e41f4b71Sopenharmony_cifree [_-b | -k | -m | -g | -t_] 12e41f4b71Sopenharmony_ci 13e41f4b71Sopenharmony_ci 14e41f4b71Sopenharmony_ci## Parameters 15e41f4b71Sopenharmony_ci 16e41f4b71Sopenharmony_ci**Table 1** Parameter description 17e41f4b71Sopenharmony_ci 18e41f4b71Sopenharmony_ci| Parameter| Description | 19e41f4b71Sopenharmony_ci| -------- | -------- | 20e41f4b71Sopenharmony_ci| No parameter| Displays the memory usage in bytes.| 21e41f4b71Sopenharmony_ci| --help/-h | Displays the parameters supported by the **free** command.| 22e41f4b71Sopenharmony_ci| -b | Displays the memory usage in bytes.| 23e41f4b71Sopenharmony_ci| -k | Display the memory waterline in KiB.| 24e41f4b71Sopenharmony_ci| -m | Display the memory waterline in MiB.| 25e41f4b71Sopenharmony_ci| -g | Displays the memory usage in GiB.| 26e41f4b71Sopenharmony_ci| -t | Displays the memory usage in TiB.| 27e41f4b71Sopenharmony_ci 28e41f4b71Sopenharmony_ci 29e41f4b71Sopenharmony_ci## Usage Guidelines 30e41f4b71Sopenharmony_ci 31e41f4b71Sopenharmony_ciNone. 32e41f4b71Sopenharmony_ci 33e41f4b71Sopenharmony_ci 34e41f4b71Sopenharmony_ci## Example 35e41f4b71Sopenharmony_ci 36e41f4b71Sopenharmony_ciRun **free**, **free -k**, and **free -m**, respectively. 37e41f4b71Sopenharmony_ci 38e41f4b71Sopenharmony_ci 39e41f4b71Sopenharmony_ci## Output 40e41f4b71Sopenharmony_ci 41e41f4b71Sopenharmony_ci 42e41f4b71Sopenharmony_ci``` 43e41f4b71Sopenharmony_ciOHOS:/$ free 44e41f4b71Sopenharmony_ci total used free shared buffers 45e41f4b71Sopenharmony_ciMem: 2819652 2754468 65184 0 0 46e41f4b71Sopenharmony_ci-/+ buffers/cache: 2754468 65184 47e41f4b71Sopenharmony_ciSwap: 0 0 0 48e41f4b71Sopenharmony_ciOHOS:/$ free -k 49e41f4b71Sopenharmony_ci total used free shared buffers 50e41f4b71Sopenharmony_ciMem: 2753 2692 60 0 0 51e41f4b71Sopenharmony_ci-/+ buffers/cache: 2692 60 52e41f4b71Sopenharmony_ciSwap: 0 0 0 53e41f4b71Sopenharmony_ciOHOS:/$ free -m 54e41f4b71Sopenharmony_ci total used free shared buffers 55e41f4b71Sopenharmony_ciMem: 2 2 0 0 0 56e41f4b71Sopenharmony_ci-/+ buffers/cache: 2 0 57e41f4b71Sopenharmony_ciSwap: 0 0 0 58e41f4b71Sopenharmony_ci``` 59e41f4b71Sopenharmony_ci 60e41f4b71Sopenharmony_ci**Table 2** Output description 61e41f4b71Sopenharmony_ci 62e41f4b71Sopenharmony_ci| Parameter| Description| 63e41f4b71Sopenharmony_ci| -------- | -------- | 64e41f4b71Sopenharmony_ci| total | Total size of the dynamic memory pool.| 65e41f4b71Sopenharmony_ci| used | Size of the used memory.| 66e41f4b71Sopenharmony_ci| free | Size of the unallocated memory.| 67e41f4b71Sopenharmony_ci| shared | Size of the shared memory.| 68e41f4b71Sopenharmony_ci| buffers | Size of the buffer.| 69e41f4b71Sopenharmony_ci 70