UbuntuHelp:SwapSpace

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https://help.ubuntu.com/community/SwapSpace

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Swap Space

Ever wanted to change your amount of swap space ? Now you can ! First add a new disk (sdb) to your physical or virtual machine then use fdisk to create an appropriate partition for your swap space (type 82)

# fdisk /dev/sdb

then

# free -k
# mkswap -L sdb-swap /dev/sdb1
# swapoff -a
# vi /etc/fstab
LABEL=sdb1-swap         swap                    swap    defaults        0 0
# swapon -a
# free -k

Finally reboot to check new swap area gets picked up on reboot !

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