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RedHat 9 (Linux i386) - man page for free (redhat section 1)

FREE(1) 							Linux User's Manual							   FREE(1)

free - display information about free and used memory on the system
free [-b|-k|-m|-g] [-l] [-o] [-t] [-s delay ] [-c count ]
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.
Normal invocation of free(1) does not require any options. The output, however, can be fine-tuned by specifying one or more of the follow- ing 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 speci- fied, 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
/proc/meminfo -- memory information
ps(1), top(1), vmstat(1)
Written by Robert Love. The procps package is maintained by Rik van Riel and Robert Love and was created by Michael Johnson. Send bug reports to <>. Linux 18 Nov 2002 FREE(1)