The “free” command is used to displays information about the servers/hosts memory usage. Which gives details of the total memory, used memory, and available memory, also swap space usage. It comes from “procps-ng” package.
Examples:
1. To display the memory utilization of the system you can the command and the output will display below parameters.
| $ free |
2. To display the memory utilization in bytes
| $ free -b |
3. To display the memory utilization in kilo bytes
| $ free -k |
4. To display the memory utilization in mega bytes
| $ free -m |
5. To display the memory utilization in giga bytes
| $ free -g |
6. To display the memory utilization with totals
| $ free -t |
7. To display the memory utilization in human readable format,
| $ free -h |
8. To display the continuous polling data
| $ free -s 2 10 |
9. To see the detailed high and low statistics for memory usage
| $ free -l |
10. To get the version information
| $ free -V |
Related Commands: ps, slabtop, vmstat, top
