Swap 파일 시스템 관리

# dd if=/dev/zero of=/swapfile bs=1M size=2048

# mkswap /swapfile 
mkswap: /swapfile: warning: don't erase bootbits sectors
        on whole disk. Use -f to force.
Setting up swapspace version 1, size = 2097148 KiB
no label, UUID=97bd924d-0ca8-436e-aafa-22c9464c26cc

# swapon /swapfile 

# free
             total       used       free     shared    buffers     cached
Mem:       1696160     572576    1123584          0     230060     200596
-/+ buffers/cache:     141920    1554240
Swap:            0          0          0

# free
             total       used       free     shared    buffers     cached
Mem:       1696160    1681500      14660          0     141288    1378584
-/+ buffers/cache:     161628    1534532
Swap:      2097144          0    2097144

# cat /etc/fstab
......
/swapfile       none    swap    sw      0       0
......