On 2012-03-17 11:19, Dale wrote: > The program 'su' could not be found. > Ensure your PATH is set correctly.
What does 'echo $PATH' give you? /bin should be in your path (that's where 'su' is located, or should be)... My $PATH looks like this: /usr/local/bin:/usr/bin:/bin:/opt/bin:/usr/x86_64-pc-linux-gnu/gcc-bin/4.5.3:/usr/games/bin I don't know if this is the case but maybe, you're using some of the new-fangled screw up'ed tools like, dracut, systemd etc. that wants to move everything into /usr (on the same partition as /) and as such changes your $PATH accordingly (without checking perhaps - which would be consistent with the arrogance of the coders). > -rws--x--x 1 root root 36680 Mar 16 23:36 su > -rws--x--x 1 root root 52416 Mar 16 23:19 umount > -rws--x--x 1 root root 42592 Mar 16 23:36 passwd The 's' part is for the SetUID bit which gives the root-owned command in question root privileges, in order to switch user... See: http://blog.superuser.com/2011/04/22/linux-permissions-demystified/ (esp. the "Getting sticky!" chapter). That's not all though...: > it, then what? I am in the wheel group. I'm also in the tty group. Check your /etc/pam.d/su file... it should contain (at least) this line: auth required pam_wheel.so use_uid That's what gives you permission to use 'su' as a member of the 'wheel' group ('su' is controlled by 'pam'). Best regards Peter K
