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Questions tagged [rhel6]

Red Hat Enterprise Linux version 6 is a Linux distribution sold by Red Hat, Inc. for the enterprise market. It is used for both servers and desktops. Although the binaries are not freely available, the sources are, and so there are numerous projects which provide compatible rebuilds of RHEL, such as CentOS and Scientific Linux.

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How to make NTP work despite a high offset?

Recently I have kickstarted some servers that had their time off by a month in the bios. The time in the bios said it was a random time/date in May, while it was June. This caused NTP not to work, because NTP doesn't sync with such a high offset.…
ujjain
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Understanding RedHat's recommended tuned profiles

We are going to roll out tuned (and numad) on ~1000 servers, the majority of them being VMware servers either on NetApp or 3Par storage. According to RedHats documentation we should choose the virtual-guestprofile. What it is doing can be seen here:…
espenfjo
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Errors using new rsyslog template syntax on RHEL6

I'm migrating our rsyslog config from an old server to a new one, and thought I'd use the opportunity to tidy up our config. The old config used "legacy" template definitions, and the rsyslog doc on templates recommend replacing such definitions…
Bart B
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Clone kvm/qemu VM to a different server

What's the easiest/quickest way to clone a VM from one server onto another if you don't have shared storage between the two servers (so you can't do a standard migration)? I have a production ready VM installed on one server, and I want to clone it…
Andrew Case
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Best way to manage custom ports in SELinux

On RHEL 6.2, we're using httpd on a host as a front-end proxy for Tomcat on another host, and we also have mod_status configured to listen on a non-standard port to provide status info to a monitoring tool. Therefore, we need httpd to 1) establish…
Eric Rath
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Can I set up Fedora or Centos repos in RHEL6?

I have a RHEL6 box with no subscription to Red Hat Network. I want to install gcc using yum to resolve all the complex dependencies. Can I connect to Fedora or Centos repositories to install software? If so, how?
Liam
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Account Lockout with pam_tally2 in RHEL6

I am using pam_tally2 to lockout accounts after 3 failed logins per policy, however, the connecting user does not receive the error indicating pam_tally2's action. (Via SSH.) I expect to see on the 4th attempt: Account locked due to 3 failed…
Aaron Copley
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Php pdo_dblib - cannot find/unable to load freetds

Self-hosted box, RHEL 6 PHP 5.3.3 PDO installed freetds installed pdo_dblib - so far no luck installing My goal is to use PDO with sybase. Attempting to install pdo_dblib from the appropriate version php source code. I have tried a variety of…
MaxPowers
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Interpreting cryptic kernel "page allocation failure" messages

I have a multi-user CentOS 6.1 database system running an application named ABC. The server is 64-bit, 8GB RAM and 6 vCPU (on VMWare ESXi 4). We get frequent dumps into the dmesg and the system logs detailing kernel page allocation failures. What…
ewwhite
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bond slave interfaces not getting the same aggregator id on LACP

I have a bug on some servers where LACP (802.3ad) is not working. I have on all servers a bonding device bond0 with two eth slaves and each interface is plugged on a different swich, and both switches configured with LACP. Everything seems to be ok,…
Baptiste Mille-Mathias
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How to log if a user removes a file from samba share

I am working over the default Samba that comes with RHEL 6.x version. I am successful in sharing a samba share to my client users. I have given each of them a set of credentials using which they have to connect to samba server and upload or download…
Shashikanth Komandoor
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RHEL6 Keeping 1 old kernel and security

I have my RHEL 5&6 servers set to keep 1 old kernel after updates, I do this in case I need to recover the system for any number of reasons. My question is related to security of the system when running with the most current kernel but still having…
user1548815
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How come all LDAP users are shown with getent passwd?

We are using an LDAP server with both Solaris and RHEL servers and planning to migrate more servers over to RHEL. However we have an issue with LDAP on all Red Hat servers. When I type "getent passwd", all users on the entire LDAP Server are shown,…
ujjain
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How to prevent installation of incompatible rpm packages

I have two rpm packages that should not get installed together. After googling around I assume there is no RequiresNot tag or something similar to specify incompatible packages in a specfile. What is the best solution to prevent installing them…
jgb
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How to kill ostensibly immortal process?

I had some huge file transfers operating on an NFS mount. The server on which the mount point resided was carelessly rebooted, and now the server from which these large transfers were initiated seems to be bogged down by them. If I run top, I see…
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