From stan.hearn at nscorp.com Tue Dec 7 13:38:48 2010 From: stan.hearn at nscorp.com (Hearn, Stan J.) Date: Tue, 07 Dec 2010 08:38:48 -0500 Subject: MD5 Differences in same version of /bin/bash Message-ID: <538F89E3C87A57448992D542F6B02C03659D21DC6B@GATUCEXCH03ASV.nscorp.ad.nscorp.com> What am I missing here? I'm finding that /bin/bash is identical in every way (size, date stamp, version) on two identical systems except for the MD5 checksum. How is this possible? === SYSTEM A === $ md5sum /bin/bash 9df8e0f4872774dfe2005f063af32748 /bin/bash === SYSTEM B === $ md5sum /bin/bash 0060bf6cde9eb7f726ce18b5c150620b /bin/bash === SYSTEM A === $ md5sum /bin/bash 9df8e0f4872774dfe2005f063af32748 /bin/bash $ rpm -qf /bin/bash bash-3.2-24.el5 $ /bin/bash --version GNU bash, version 3.2.25(1)-release (x86_64-redhat-linux-gnu) Copyright (C) 2005 Free Software Foundation, Inc. $ ls -l /bin/bash -rwxr-xr-x 1 root root 801512 Oct 21 2008 /bin/bash $ md5sum --version md5sum (GNU coreutils) 5.97 Copyright (C) 2006 Free Software Foundation, Inc. This is free software. You may redistribute copies of it under the terms of the GNU General Public License . There is NO WARRANTY, to the extent permitted by law. Written by Ulrich Drepper, Scott Miller, and David Madore. $ lsb_release -a LSB Version: :core-3.1-amd64:core-3.1-ia32:core-3.1-noarch:graphics-3.1-amd64:graphics-3.1-ia32:graphics-3.1-noarch Distributor ID: RedHatEnterpriseServer Description: Red Hat Enterprise Linux Server release 5.5 (Tikanga) Release: 5.5 Codename: Tikanga $ === SYSTEM B === $ md5sum /bin/bash 0060bf6cde9eb7f726ce18b5c150620b /bin/bash $ rpm -qf /bin/bash bash-3.2-24.el5 $ /bin/bash --version GNU bash, version 3.2.25(1)-release (x86_64-redhat-linux-gnu) Copyright (C) 2005 Free Software Foundation, Inc. $ ls -l /bin/bash -rwxr-xr-x 1 root root 801512 Oct 21 2008 /bin/bash $ md5sum --version md5sum (GNU coreutils) 5.97 Copyright (C) 2006 Free Software Foundation, Inc. This is free software. You may redistribute copies of it under the terms of the GNU General Public License . There is NO WARRANTY, to the extent permitted by law. Written by Ulrich Drepper, Scott Miller, and David Madore. $ lsb_release -a LSB Version: :core-3.1-amd64:core-3.1-ia32:core-3.1-noarch:graphics-3.1-amd64:graphics-3.1-ia32:graphics-3.1-noarch Distributor ID: RedHatEnterpriseServer Description: Red Hat Enterprise Linux Server release 5.5 (Tikanga) Release: 5.5 Codename: Tikanga $ From David.Kinzel at encana.com Tue Dec 7 14:19:36 2010 From: David.Kinzel at encana.com (Kinzel, David) Date: Tue, 7 Dec 2010 07:19:36 -0700 Subject: MD5 Differences in same version of /bin/bash In-Reply-To: <538F89E3C87A57448992D542F6B02C03659D21DC6B@GATUCEXCH03ASV.nscorp.ad.nscorp.com> References: <538F89E3C87A57448992D542F6B02C03659D21DC6B@GATUCEXCH03ASV.nscorp.ad.nscorp.com> Message-ID: Prelinking maybe? Try prelink -u /bin/bash on both, then check the md5sums. >-----Original Message----- >From: redhat-sysadmin-list-bounces at redhat.com >[mailto:redhat-sysadmin-list-bounces at redhat.com] On Behalf Of >Hearn, Stan J. >Sent: Tuesday, December 07, 2010 6:39 AM >To: 'redhat-sysadmin-list at redhat.com' >Subject: MD5 Differences in same version of /bin/bash > >What am I missing here? > >I'm finding that /bin/bash is identical in every way (size, >date stamp, version) on two identical systems except for the >MD5 checksum. How is this possible? > >=== SYSTEM A === >$ md5sum /bin/bash >9df8e0f4872774dfe2005f063af32748 /bin/bash >=== SYSTEM B === >$ md5sum /bin/bash >0060bf6cde9eb7f726ce18b5c150620b /bin/bash > >=== SYSTEM A === >$ md5sum /bin/bash >9df8e0f4872774dfe2005f063af32748 /bin/bash >$ rpm -qf /bin/bash >bash-3.2-24.el5 >$ /bin/bash --version >GNU bash, version 3.2.25(1)-release (x86_64-redhat-linux-gnu) >Copyright (C) 2005 Free Software Foundation, Inc. >$ ls -l /bin/bash >-rwxr-xr-x 1 root root 801512 Oct 21 2008 /bin/bash >$ md5sum --version >md5sum (GNU coreutils) 5.97 >Copyright (C) 2006 Free Software Foundation, Inc. >This is free software. You may redistribute copies of it >under the terms of >the GNU General Public License . >There is NO WARRANTY, to the extent permitted by law. > >Written by Ulrich Drepper, Scott Miller, and David Madore. >$ lsb_release -a >LSB Version: >:core-3.1-amd64:core-3.1-ia32:core-3.1-noarch:graphics-3.1-amd6 >4:graphics-3.1-ia32:graphics-3.1-noarch >Distributor ID: RedHatEnterpriseServer >Description: Red Hat Enterprise Linux Server release 5.5 (Tikanga) >Release: 5.5 >Codename: Tikanga >$ > >=== SYSTEM B === >$ md5sum /bin/bash >0060bf6cde9eb7f726ce18b5c150620b /bin/bash >$ rpm -qf /bin/bash >bash-3.2-24.el5 >$ /bin/bash --version >GNU bash, version 3.2.25(1)-release (x86_64-redhat-linux-gnu) >Copyright (C) 2005 Free Software Foundation, Inc. >$ ls -l /bin/bash >-rwxr-xr-x 1 root root 801512 Oct 21 2008 /bin/bash >$ md5sum --version >md5sum (GNU coreutils) 5.97 >Copyright (C) 2006 Free Software Foundation, Inc. >This is free software. You may redistribute copies of it >under the terms of >the GNU General Public License . >There is NO WARRANTY, to the extent permitted by law. > >Written by Ulrich Drepper, Scott Miller, and David Madore. >$ lsb_release -a >LSB Version: >:core-3.1-amd64:core-3.1-ia32:core-3.1-noarch:graphics-3.1-amd6 >4:graphics-3.1-ia32:graphics-3.1-noarch >Distributor ID: RedHatEnterpriseServer >Description: Red Hat Enterprise Linux Server release 5.5 (Tikanga) >Release: 5.5 >Codename: Tikanga >$ > >-- >redhat-sysadmin-list mailing list >redhat-sysadmin-list at redhat.com >https://www.redhat.com/mailman/listinfo/redhat-sysadmin-list > This email communication and any files transmitted with it may contain confidential and or proprietary information and is provided for the use of the intended recipient only. Any review, retransmission or dissemination of this information by anyone other than the intended recipient is prohibited. If you receive this email in error, please contact the sender and delete this communication and any copies immediately. Thank you. http://www.encana.com From jsbillin at umich.edu Tue Dec 7 14:25:11 2010 From: jsbillin at umich.edu (Jonathan S Billings) Date: Tue, 07 Dec 2010 09:25:11 -0500 Subject: MD5 Differences in same version of /bin/bash In-Reply-To: <538F89E3C87A57448992D542F6B02C03659D21DC6B@GATUCEXCH03ASV.nscorp.ad.nscorp.com> References: <538F89E3C87A57448992D542F6B02C03659D21DC6B@GATUCEXCH03ASV.nscorp.ad.nscorp.com> Message-ID: <4CFE43C7.7060805@umich.edu> On 12/07/2010 08:38 AM, Hearn, Stan J. wrote: > What am I missing here? > > I'm finding that /bin/bash is identical in every way (size, date > stamp, version) on two identical systems except for the MD5 checksum. > How is this possible? Do you have prelink installed and enabled? By default, I believe that it's run with -R, which randomizes the address space to protect the executable from certain kinds of exploits. Check out the man page for 'prelink' for more details, or read the Wikipedia page: http://en.wikipedia.org/wiki/Prelink -- Jonathan Billings College of Engineering - CAEN - Unix and Linux Support From nitin.gizare at wipro.com Wed Dec 29 12:18:14 2010 From: nitin.gizare at wipro.com (nitin.gizare at wipro.com) Date: Wed, 29 Dec 2010 17:48:14 +0530 Subject: RHEL 5.0 and NFS Message-ID: Hello We have RHEL4.0 Up8 and newly added RHEL 5.0 servers. We are using RHEL 5.0 as nfs servers. NFS server's shares are shared using autofs. We see that RHEL 4.0 Up 8 servers intermittently hangs when use df command and in logs of we are seeing RPC time out error. Request some body to help us with any specific setting of nfs needs to be done in nfs server (RHEL 5.0) side. Thanks in advance. Rgds Nitin -------------- next part -------------- An HTML attachment was scrubbed... URL: From hgrubbs at shackhost.net Wed Dec 29 14:17:20 2010 From: hgrubbs at shackhost.net (hgrubbs at shackhost.net) Date: Wed, 29 Dec 2010 08:17:20 -0600 Subject: RHEL 5.0 and NFS In-Reply-To: References: Message-ID: <20101229141720.GA14868@ln.shackhost.net> That is usually indicitive of an unmounted NFS share that is still listed in mtab. `df` tries to query it and hangs. Check mtab for defunct NFS mounts - remove them and try `df` again. On Wed, Dec 29, 2010 at 05:48:14PM +0530, nitin.gizare at wipro.com wrote: > Hello > > > > We have RHEL4.0 Up8 and newly added RHEL 5.0 servers. We are using RHEL > 5.0 as nfs servers. > > NFS server's shares are shared using autofs. We see that RHEL 4.0 Up 8 > servers intermittently hangs when use df command and in logs of we are > seeing RPC time out error. > > Request some body to help us with any specific setting of nfs needs to > be done in nfs server (RHEL 5.0) side. > > > > Thanks in advance. > > > > Rgds > > Nitin > > > > > > -- > redhat-sysadmin-list mailing list > redhat-sysadmin-list at redhat.com > https://www.redhat.com/mailman/listinfo/redhat-sysadmin-list