To create multiple IPs per Interface in CentOS 5

Create the virtual interface vi /etc/sysconfig/network-scripts/ifcfg-eth0:0vi /etc/sysconfig/network-scripts/ifcfg-eth0:0 Populate the file DEVICE=eth0:0 ONPARENT=yes IPADDR=10.10.10.10DEVICE=eth0:0 ONPARENT=yes IPADDR=10.10.10.10 Bring up the interface /sbin/ifup eth0:0/sbin/ifup eth0:0 The interface will be brought up and down automatically as the parent interface (eth0) changes state.

Dock Spacer in OS-X

To Add a space to your Dock in OS-X. defaults write com.apple.dock persistent-apps -array-add ‘{ "tile-type" = "spacer-tile"; }’ killall Dockdefaults write com.apple.dock persistent-apps -array-add ‘{ "tile-type" = "spacer-tile"; }’ killall Dock