Swapping is when a computer exchanges the location of memory pages between physical RAM and harddisk space.
add swap space
If you want to add swap space to your running system
- create a file (in this example /tmp/swap with a size of 1GB)
# dd if=/dev/zero of=/tmp/swap bs=1024k count=1000 1000+0 records in 1000+0 records out 1048576000 bytes (1.0 GB) copied, 4.35241 s, 241 MB/s
- make it swap space
# mkswap /tmp/swap Setting up swapspace version 1, size = 1023996 KiB no label, UUID=107e7939-e839-4a0e-b8fb-a50c9e0b96d5
- tell the kernel to use it for swapping
# swapon /tmp/swap
- This command did not work with Knoppix 7.02.
- verify it has been added to your swap devices:
# swapon -s Filename Type Size Used Priority /tmp/swap file 1023996 0 -1
remove swap space
To remove swap space from your system again, use the command swapoff, e.g.
# swapoff /tmp/swap