[PLUG] chroot on FC2 / RHEL failing
khadgaray at gmail.com
Mon Sep 18 21:50:24 IST 2006
On Mon, 2006-09-18 at 16:35 +0530, Arindam wrote:
> I am trying to setup boot server which will allow remote boots by PCs
> with BIOSes and network cards which support booting from the LAN (most
> do these days).
> I am stuck with a rather small detail. I am creating an NFS server
> share where I am creating a minimal installation of FC2 which can be
> used by the remotely booted system as basic storage. To do this I need
> to use the chroot command and this does not seem to work on either FC2
> or RedHat Linux.
> What I have done is this:
> 1. Copied a hello_world executable to /pub/rbootshare which is meant
> to be the root directory for the remote-booted server.
> 2. I am trying the following command:
> # chroot /pub/rbootshare /hello_world
> I understand that this should fail because when /pub/rbootshare is set
> as root, resolving the basic glibc shared libraries fails (because the
> glibc.so.* etc are not under /pub/rbootshare). But the error message I
> am getting says:
> /hello_world: No such file or directory. This makes no sense because I
> have copied hello_world to /pub/rbootshare and used chroot to set this
> as root.
> On FreeBSD, it gives a meaningful message indicating that loading
> necessary libraries has failed. But I need it on Linux ... not
Run ldd command on the app, for example /bin/ls
# ldd /bin/ls
librt.so.1 => /lib/tls/librt.so.1 (0x00924000)
libacl.so.1 => /lib/libacl.so.1 (0x00b27000)
libselinux.so.1 => /lib/libselinux.so.1 (0x004fb000)
libc.so.6 => /lib/tls/libc.so.6 (0x009cf000)
libpthread.so.0 => /lib/tls/libpthread.so.0 (0x00c2a000)
libattr.so.1 => /lib/libattr.so.1 (0x0050b000)
copy the lib file over to /chroot-folder/lib
#cp -p /lib/libattr.so.1 \
This should allow you to run ls command under chroot.
LinuX N Stuff
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