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there are a few options to enable swap in ltsp.
(this assumes an ltsp dir of /opt/ltsp, and achitecture of i386, adjust to your
configuration if necessary)
using local swap partitions from the hard disk:
add to /opt/ltsp/i386/etc/lts.conf:
[Default]
USE_LOCAL_SWAP=Y
network swap using NBD:
touch /opt/ltsp/i386/etc/nbd-client
in /opt/ltsp/i386/etc/lts.conf:
[Default]
NBD_SWAP=Y
apt-get install nbd-server
update-inetd --group LTSP --add "9210 stream tcp nowait nobody /usr/sbin/tcpd /usr/sbin/nbdswapd"
encrypting swap space:
in /opt/ltsp/i386/etc/lts.conf:
ENCRYPT_SWAP=Y
and install the cryptsetup package:
chroot /opt/ltsp/i386 apt-get install cryptsetup
alternately, you can configure nbd-server the hard way:
apt-get install nbd-server
in /etc/nbd-server:
NBD_PORT[0]=9210
NBD_FILE[0]=/opt/ltsp/swap/swapfile.%s
NBD_SERVER_OPTS[0]=""
invoke-rc.d nbd-server start
create a file for each possible ip address that will attempt
to connect to the server:
# size in megabytes
size=100
your_ip_addresses="10.0.2.2 10.0.2.3 10.0.2.4 ..."
mkdir -p /opt/ltsp/swap/
for a in $your_ip_addresse ; do
dd if=/dev/zero of=/opt/ltsp/swap/swapfile.$a bs=1024k count=$size
done
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