Difference between sudo and sudo bash (or root terminal)?

[cogset]

I was wandering what are the actual differences between using sudo or sudo bash (or the root terminal):I was under the assumption that sudo had all the privileges of root but for a short period of time,so that running a command by either using sudo,or sudo bash,or opening a root terminal would be the same as far as that particular command goes-well,I've just recently found out that a command like

echo 1 > /sys/device/sd$/delete

only works with sudo bash or in a root terminal,but not with plain sudo:why is that? What is the difference?

[jdeca57]

You can find a discussion here: http://askubuntu.com/questions/20578...edirect-output but in essence sudo works on echo only and not on the redirection. If you have a root shell it works on complete environment.