System Memory

Use a remote terminal to log in to the server where the instruction stream cloud phone is deployed as the instruction stream cloud phone O&M user (for example, root).
Run the following command to switch to the root user:
```
su - root
```
Run the following command to check the drive usage of the instruction stream cloud phone server:
```
free
```
You can run the free command to query the system memory usage, including the physical memory, virtual swap file memory, and shared memory regions, as well as buffers used by system cores. The memory usage of the instruction stream cloud phone can also be queried by using this command.

Parent topic: Performance Monitoring