Sudo can't execute some commands[SOLVED]

Hi Archers,
I am using sudo and disable root account. There is some problems with sudo such as the following commands:
#sudo echo "1234" >/etc/rc.local
# sudo cd /root
I can't execute these commands with sudo, instead i have to login as root and execute the commands. So the question is how can I solve these problems?
The Second issue is how can I give certain user the commands that they can execute. For example, user A is only allowed to use "ls" commands and not any other commands?
Cheers
Last edited by hungsonbk (2008-11-17 02:02:29)

You can't use those commands because it aren't real commands, it are shell builtins and they are ran by your shell which is ran by your regular user.
sudo echo foo > bar
This runs the "echo" binary as root but the ">" part is handled by the shell, appropriate way to handle this:
echo foo|sudo tee bar
cd wont work neither, if it did you could cd to a directory you don't have permissions to and then you would be in their as regular user, unable to do anything... You should just work from outside /root or use sudo -s.
For the user thing: man sudoers.
Last edited by Ramses de Norre (2008-11-15 16:52:55)

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