| Linux / Unix Command: free |
NAME
free - display information about free and used memory on the systemSYNOPSIS
free [-b|-k|-m|-g] [-l] [-o] [-t] [-s delay ] [-c count ]DESCRIPTION
free(1) displays the total amount of free and used physical memory and swap space in the system, as well as the buffers and cache consumed by the kernel.OPTIONS
Normal invocation of free(1) does not require any options. The output, however, can be fine-tuned by specifying one or more of the following flags:- -b, --bytes
- Display output in bytes.
- -k, --kb
- Display output in kilobytes (KB). This is the default.
- -m, --mb
- Display output in megabytes (MB).
- -g, --gb
- Display output in gigabytes (GB).
- -l, --lowhigh
- Display detailed information about low vs. high memory usage.
- -o, --old
- Use old format. Specifically, do not display -/+ buffers/cache.
- -t, --total
- Display total summary for physical memory + swap space.
- -c n, --count=n
- Display statistics n times, then exit. Used in conjunction with the -s flag. Default is to display only once, unless -s was specified, in which case default is to repeat until interrupted.
- -s n, --repeat=n
- Repeat, pausing every n seconds in-between.
- -V, --version
- Display version information and exit.
- --help
-
Display usage information and exit
SEE ALSO
ps(1), top(1), vmstat(1)Important: Use the man command (% man) to see how a command is used on your particular computer.