On Wed, Aug 30, 2017 at 3:16 PM, Tony Nelson
<tonynel...@georgeanelson.com> wrote:
>
> I have an old CentOS5 that I chroot into. On my old f20 box, PATH
> included /bin, but now on f26 it does not. I don't understand how
> this could happen; I would think that PATH is set inside the chroot
> by the shell. How does PATH get set? I see how it is modified and
> have fixed my issue, provided I use a login shell.

It's because chroot keeps PATH set. So if your pre-chroot PATH doesn't
include "/sbin" or "/bin", they won't be in the chrooted PATH:

root@fedraw ~ # echo $PATH
/usr/sbin:/usr/bin

root@fedraw ~ # chroot /bb ./busybox sh

\u@\h \w # echo $PATH
/usr/sbin:/usr/bin

\u@\h \w # exit

root@fedraw ~ # PATH=/sbin:/bin:/usr/sbin:/usr/bin chroot /bb ./busybox sh

\u@\h \w # echo $PATH
/sbin:/bin:/usr/sbin:/usr/bin

\u@\h \w # exit

root@fedraw ~ #

If you use a login shell (eg, "chroot /bb bash -l" instead of "chroot
/bb bash"), the dotfiles that will be sourced will set the appropriate
chrooted PATH.
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