This is what things look like on one of my systems:

[root@centos57 ~]# cat /etc/redhat-release CentOS release 5.7 (Final) [root@centos57 ~]# ls -l /usr/lib64/libz.so* lrwxrwxrwx 1 root root 21 Jan 31 02:47 /usr/lib64/libz.so.1 -> ../../lib64/libz.so.1 lrwxrwxrwx 1 root root 25 Jan 31 02:47 /usr/lib64/libz.so.1.2.3 -> ../../lib64/libz.so.1.2.3 [root@centos57 ~]# ls -l /lib64/libz.so* lrwxrwxrwx 1 root root 13 Jan 31 02:47 /lib64/libz.so.1 -> libz.so.1.2.3 -rwxr-xr-x 1 root root 83280 May 11 2011 /lib64/libz.so.1.2.3

If the symlink is missing you could try to manually recreate it.

Regards, Dennis

On 01/31/2012 01:38 PM, Dvorkin, Asya wrote:

Sorry, i meant to say /usr/lib64/libz.so.1 is missing…

Thank you for all your help, Asya

On Jan 31, 2012, at 7:29 AM, Dvorkin, Asya wrote:

...

Hello,

We have an older AFS server, which was running Centos 5.5. It hasn't been updated in a while because of the plans to move it to another server, but it never happened.

Thus, we've decided to upgrade it to 5.7…

I did yum clean all and yum update. Everything ran smoothly and no issues. After the reboot, zlib.so.1 can no longer be found. /usr/lib64/zlib.so.1 is a symbolic link to /lib64/zlib.so.1, but the file does not exist. Because of this, ssh/yum/rpm do not work…

I've been googling, but can't find a solid answer. This is a production server and I need to have it up and running as soon as possible…

Any ideas?

Thank you! Asya

---

CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos

On 01/31/2012 01:57 PM, Dvorkin, Asya wrote:

The problem is that the file itself is missing as well, so no way for me to recreate the link. Actually, libz.1.so.1.2.3 doesn't exist either.

I could try copying the file from another CentOS server, but wanted to hear everyone's opinion on that…

It is the only way besides getting the file from he servers backup, or manually unpacking the rpm end extracting files.

...

...

The problem is that the file itself is missing as well, so no way for me to recreate the link. Actually, libz.1.so.1.2.3 doesn't exist either.

I could try copying the file from another CentOS server, but wanted to hear everyone's opinion on that…

I'd say try that and as soon as you get yum/rpm working do a "yum reinstall zlib" to get the files properly in place again.

Thank you! I've copied the file using USB drive and now the server is up and running. I also did yum reinstall zlib.

Now when I do yum update, it says: No Packages marked for Update

If that's the case, how come /etc/redhat-release still shows CentOS release 5.5 (Final) ?

Asya

On 01/31/12 6:04 AM, Dvorkin, Asya wrote:

I figured it out. Whoever was in charge of this server before me, added the following lines to CentOS-Base.repo

exclude=kernel kernel-devel kernel-PAE-*

FWIW (about US$0.02 before inflation), when I've done that, its almost always been because there was a proprietary kernel module on the system that wouldn't get updated with the new kernel (and wasn't using that auto-kernel-thing, whatever its called).

On 01/31/2012 02:20 PM, Dvorkin, Asya wrote:

Thank you! I've copied the file using USB drive and now the server is up and running. I also did yum reinstall zlib.

Now when I do yum update, it says: No Packages marked for Update

If that's the case, how come /etc/redhat-release still shows CentOS release 5.5 (Final) ?

You can use "yum history" set of commands to see what was don by yum, and to revert the upgrade, repeat it, etc.

yum history list yum history info <transaction number> yum history help - for full list of commands

On 01/31/2012 06:45 AM, Andreas Reschke wrote:

centos-bounces@centos.org schrieb am 31.01.2012 13:38:09:

...

"Dvorkin, Asya" dvorkias@umdnj.edu Gesendet von: centos-bounces@centos.org

31.01.2012 13:38

Bitte antworten an CentOS mailing list centos@centos.org

An

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Thema

Re: [CentOS] libz.so.1 => not found

Sorry, i meant to say /usr/lib64/libz.so.1 is missing…

Thank you for all your help, Asya

On Jan 31, 2012, at 7:29 AM, Dvorkin, Asya wrote:

...

Hello,

We have an older AFS server, which was running Centos 5.5. It

hasn't been updated in a while because of the plans to move it to another server, but it never happened.

...

Thus, we've decided to upgrade it to 5.7…

I did yum clean all and yum update. Everything ran smoothly and

no issues. After the reboot, zlib.so.1 can no longer be found. / usr/lib64/zlib.so.1 is a symbolic link to /lib64/zlib.so.1, but the file does not exist. Because of this, ssh/yum/rpm do not work…

...

I've been googling, but can't find a solid answer. This is a

production server and I need to have it up and running as soon as

possible…

...

...

Any ideas?

Thank you! Asya

---

CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos

Hello Asya,

with "um whatprovides */libz.so.1"

I found following rpms:

zlib-1.2.3-27.el6.x86_64 : The zlib compression and decompression library Repo : base Matched from: Filename : /lib64/libz.so.1

zlib-1.2.3-27.el6.i686 : The zlib compression and decompression library Repo : base Matched from: Filename : /lib/libz.so.1

nxclient-3.5.0-7.x86_64 : NX Client Repo : own_repo Matched from: Filename : /usr/NX/lib/libz.so.1

nxclient-3.5.0-6.x86_64 : NX Client Repo : own_repo Matched from: Filename : /usr/NX/lib/libz.so.1

dropbox-0.7.110-3.el6.rf.x86_64 : Sync and backup files between computers Repo : rpmforge Matched from: Filename : /usr/libexec/dropbox/libz.so.1

dropbox-1.1.27-2.el6.rf.x86_64 : Sync and backup files between computers Repo : rpmforge Matched from: Filename : /usr/libexec/dropbox/libz.so.1

nxclient-3.5.0-7.x86_64 : NX Client Repo : installed Matched from: Filename : /usr/NX/lib/libz.so.1

zlib-1.2.3-27.el6.x86_64 : The zlib compression and decompression library Repo : installed Matched from: Filename : /lib64/libz.so.1

zlib-1.2.3-27.el6.i686 : The zlib compression and decompression library Repo : installed Matched from: Filename : /lib/libz.so.1

And specifically for 5.7:

zlib-1.2.3-4.el5.x86_64 : The zlib compression and decompression library. Repo : installed Matched from: Other : Provides-match: /usr/lib64/libz.so.1