| xeleema |
02-20-2011 04:32 AM |
@thomas2004ch
You'll need to be sure that /bin/bash is not
a) stored in a filesystem separate from the root filesystem (/)
b) not dynamically linked to a library that's in a separate filesystem from root ( /).
c) If the shell lives in a different filesystem, or requires libraries from a different filesystem, that filesystem needs to be accessible when the server drops to Single User Mode.
Check the Shell:
Quote:
On a Solaris 10 system of mine, there's no /bin. It's a link to /usr/bin.
So there's no "/bin/bash", it's really /usr/bin/bash (and that's the shell you should "usermod -s" with)
Code:
root@lhost# ll /bin/bash
-r-xr-xr-x 1 root bin 715K May 2 2007 /bin/bash*
root@lhost# ll /|grep bin | head -1
lrwxrwxrwx 1 root root 9 May 19 2010 bin -> ./usr/bin/
Now check the shell to make sure it's using libraries that don't traverse into a filesystem separate from root (/)
Code:
root@lhost# ldd /usr/bin/bash
libcurses.so.1 => /lib/libcurses.so.1
libsocket.so.1 => /lib/libsocket.so.1
libnsl.so.1 => /lib/libnsl.so.1
libdl.so.1 => /lib/libdl.so.1
libc.so.1 => /lib/libc.so.1
libmp.so.2 => /lib/libmp.so.2
libmd.so.1 => /lib/libmd.so.1
libscf.so.1 => /lib/libscf.so.1
libdoor.so.1 => /lib/libdoor.so.1
libuutil.so.1 => /lib/libuutil.so.1
libgen.so.1 => /lib/libgen.so.1
libm.so.2 => /lib/libm.so.2
/platform/SUNW,Sun-Fire-V240/lib/libc_psr.so.1
/platform/SUNW,Sun-Fire-V240/lib/libmd_psr.so.1
root@lhost#
Now we just need to make sure that /lib and /usr are on the same filesystem as root (/)...
Code:
root@lhost# df -h .
Filesystem size used avail capacity Mounted on
/dev/md/dsk/d10 10G 3.8G 6.5G 37% /
root@lhost# cd /lib ; df -h .
Filesystem size used avail capacity Mounted on
/dev/md/dsk/d10 10G 3.8G 6.5G 37% /
root@lhost# cd /usr ; df -h .
Filesystem size used avail capacity Mounted on
/dev/md/dsk/d10 10G 3.8G 6.5G 37% /
root@lhost#
Bear in mind that the dynamic libraries for this particular bash shell may be exclusive to Solaris 10 and/or it's level of patches. Here's what this system's at;
Code:
root@lhost# cat /etc/release
Solaris 10 10/08 s10s_u6wos_07b SPARC
Copyright 2008 Sun Microsystems, Inc. All Rights Reserved.
Use is subject to license terms.
Assembled 27 October 2008
root@lhost# uname -a
SunOS lhost 5.10 Generic_141414-07 sun4u sparc SUNW,Sun-Fire-V240
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The above system is okay, because the root filesystem will always be mounted, and /usr and /lib are both within the root filesystem.
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