check ram size in Linux
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you can use this command to find the ram size in your linux machine
free
Mem is Ram size in bytes. Use -m option for output in MB.
SWAP is the size of SWAP partition.free -m
Looks like you’re using up a lot of memory. Top displays your memory usage a little better as far as the “easy to read” factor goes.
top
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September 28th, 2011 at 12:06 pm
Disabling the system services that are unnecessary may be one of the best ways to increase the performance. They usually just eat up valuable CPU and RAM time and ultimately, slow down the server. Disabling these will also minimize the possibility of your servers being remotely attacked.