[swap] make a swapfile of 1GB

-- san2@2006.01.09
-- http://dev.panopticsearch.com/swapfile-notes.html
-- http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/adding-swa
p-space.html
-- http://kerneltrap.org/node/329


/part => top level partition(available of many free size)

[FreeBSD/4.x]

dd if=/dev/zero of=/part/system.swap bs=1024k count=1024
chmod 0600 /part/system.swap

## edit in `rc.conf' or `rc.conf.local'
swapfile="/part/system.swap"

vnconfig -e /dev/vn0b /part/system.swap swap 
or
reboot

*misc)
swapinfo -k
swapoff ; // FreeBSD does not currently support swapoff


[Linux/2.4]

*RH7.x)
1G => bs=1024k count=1024
2G => bs=1024k count=2047 ; // notice
4G => 2G + 2G ; // two swapfiles

dd if=/dev/zero of=/part/system.swap bs=1024k count=1024
chmod 0600 /part/system.swap
mkswap -c /part/system.swap ; // -c: check bad block

## edit in `/etc/fstab'
/part/system.swap    swap    swap    defaults    0 0

swapon /part/system.swap
or
swapon -a

*misc)
cat /proc/swaps ; // view of all swap list
swapoff /part/system.swap ; // disable