Sudo does not work in chroot

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http://unix.stackexchange.com – I would like to be able to use the sudo command in a chroot environment. I start the chroot as follows: chroot /debian-squeeze /bin/bash Now I'm logged in as root in the chroot. I can do su user to log in as a user named user. Now, sudo does not work: user@HD:/$ sudo ls sudo: must be setuid root Some diagnostics: user@HD:/$ which sudo /usr/bin/sudo user@HD:/$ ls -al /usr/bin/sudo -rwsr-xr-x 2 root root 143884 May 23 2012 /usr/bin/sudo user@HD:/$ ls -aln /usr/bin/sudo -rwsr-xr-x 2 0 0 143884 May 23 2012 /usr/bin/sudo root@HD:/# cat /etc/sudoers Defaults env_reset root ALL=(A (HowTos)