Executing a command inside a running LXC

I want to execute a command inside an existing lxc without going through the regular Linux init. lxc-execute command is for that I guess but I get the following error when I run this command on my existing test lxc. sudo lxc-execute -n test -- service apache2 start I get following error: lxc-execute: Failed to find an lxc-init lxc-execute: invalid sequence number 1. expected 4 lxc-execute: failed to spawn 'test'