Here is the result of free:

total used free shared buffers cached
Mem: 1024924 666304 358620 0 35024 341772
-/+ buffers/cache: 289508 735416
Swap: 0 0 0

Result of sudo fdisk -l:

Disk /dev/sda: 15.4 GB, 15408046080 bytes
255 heads, 63 sectors/track, 1873 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x0f8ba6ae

Device Boot Start End Blocks Id System
/dev/sda1 1 3 24066 de Dell Utility
/dev/sda2 * 4 1873 15020775 83 Linux

Please recommend if a swap file is needed to improve performance. If yes, please show me the steps.

Thank you.

Hi,

You appear to have enough free memory at the time, but in case you
need to make use of more intensive applications the following
URL has a tutorial on how to add swap on a file:

http://www.cyberciti.biz/faq/linux-a...ap-file-howto/

Your other alternative of course is create a partition for your
swap, but you may need to resize your partitions if you don't
have unallocated space.

Best regards,