To check avilable memory in Linux type free -m command. free displays the total amount of free and used physical and swap memory in the system, as well as the buffers used by the kernel.
free -m
free -b
free -k
1. The -b switch displays the amount of memory in bytes
2. The -k switch (set by default) displays it in kilobytes
3. The -m switch displays it in megabytes
4. The -g switch displays it in gigabytes.
vmstat
Output
procs ———–memory———- —swap– —–io—- -system– —-cpu—-
r b swpd free buff cache si so bi bo in cs us sy id wa
0 0 0 63316 176624 1062340 0 0 25 18 39 592 5 1 94 0
1. swpd: the amount of virtual memory used.
2. free: the amount of idle memory.
3. buff: the amount of memory used as buffers.
4. cache: the amount of memory used as cache.
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