wget http://mirrors.sohu.com/ubuntu/pool/universe/n/netmask/netmask_2.3.12.tar.gz
tar xf netmask_2.3.12.tar.gz
cd netmask-2.3.
./configure
make
make install
netmask -r 192.168.0.0/
netmask -c 192.168.0.0:192.168.0.255
Linux netmask
wget http://mirrors.sohu.com/ubuntu/pool/universe/n/netmask/netmask_2.3.12.tar.gz
tar xf netmask_2.3.12.tar.gz
cd netmask-2.3.
./configure
make
make install
netmask -r 192.168.0.0/
netmask -c 192.168.0.0:192.168.0.255