Use dd to add swap size

Use dd to add the swap size. The current swap size is 5951 MB. create an empty file www.2cto.com 512M [root @ zwc ~]. # Free-mtotalusedfreesharedbufferscachedMem: 3947... use dd to add the swap size. The current swap size is 5951 MB, and create an empty M file www.2cto.com [root @ zwc ~] # Free-m total used free shared buffers cached Mem: 3947 793 3154 0 15 367-/+ buffers/cache: 410 3537 5951 Swap: 651 5300 [root @ zwc ~] # [Root @ zwc ~] # Dd if =/dev/zero of =/swap_mount bs = 1024 count = 524288 524288 + 0 records in 524288 + 0 records out 536870912 bytes (537 MB) copied, 1.49614 seconds, 359 MB/s [root @ zwc ~] # [Root @ zwc ~] # Ls-h/swap_mount [root @ zwc ~] # Ls-hl/swap_mount-rw-r -- 1 root 512 M Jan 24/swap_mount Mount swap_mount to swap www.2cto.com [root @ zwc ~] # Mkswap/swap_mount Setting up swapspace version 1, size = 536866 kB [root @ zwc ~] # Swapon/swap_mount [root @ zwc ~] # [Root @ zwc ~] # Free-m total used free shared buffers cached Mem: 3947 1317 2630 0 16 885-/+ buffers/cache: 415 3532 6463 Swap: 651 5812 [root @ zwc ~] # Add to automatic mounting upon startup [root @ zwc ~] # Echo "/swap_mount swap defaults 0 0">/etc/fstab [root @ zwc ~] # Cat/etc/fstab/dev/VolGroup00/LogVol00/ext3 defaults 1 1 LABEL =/boot ext3 defaults 1 2 tmpfs/dev/shm tmpfs defaults 0 0 devpts/dev/ pts devpts gid = 5, mode = 620 0 0 sysfs/sys sysfs defaults 0 0 proc/proc defaults 0 0/dev/VolGroup00/LogVol01 swap defaults 0 0/swap_mount swap defaults 0 0