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CentOS not detecting Intel 10G (ixgbe) interface

I have a server with CentOS 6.5 installed with 2x 1Gbps Ethernet Cards, I have added a new interface (Intel(R) 10 Gigabit PCI Express Network) but the problem. is the system is not detecting the ...
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3answers
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When to relink Oracle?

Various sources on the internet suggest relinking of Oracle binaries is necessary after each OS upgrade and / or patch. I can understand relinking would be necessary when upgrading glibc. Some ...
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2answers
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Installing multiple mongoDB versions on the same server

I have installed a 2.4 mongoDB version and I'd like to compare against the recently released 2.6 version. I want to know if possible to do a clean new install rather en an update to see if those two ...
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1answer
677 views

Speed of different Linux distros - why the difference?

I have a piece of multi-threaded software which runs at different speeds under the latest ubuntu server, redhat enterprise and CentOS - all installed on the exact same server for comparison. Ubuntu ...
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Comparing OS configuration of two RHEL servers

What is the best way to compare the OS configuration of two (or more) RHEL 5.X servers? Are there any tools/packages available to do this? Note, I am mostly looking for tunables OS (kernel ...
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2answers
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KVM network bridge with two NICs

Greetings, I'm trying to set up bridged networking with KVM and am getting nowhere. There are docs and tutorials on the subject, but they all seem to conflict or don't provide enough info. I was ...
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4answers
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How can I remove the GUI bits from a Red Hat Enterprise Linux install?

I am looking at a farm of RedHat Enterprise Linux (RHEL) 5.3 servers, which all have GNOME and Xorg installed, none of which need them. They were deployed by a 3rd party from a VM template, and I ...
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1answer
118 views

Active Directory: Server 2008 and RHEL 5.10

Apologies if this is a re-post. I've been googling and researching the topic for over three weeks now and I've come up against the same problem over and over again and I haven't managed to get around ...
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2answers
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Which CentOS Version Should I Use?

I have some used rackmount servers (Dell R610, HP DL180 G6, HP DL360 G5) that I intend to use for on demand video streaming in a colocation environment. I would like to have them all on the same OS to ...
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4answers
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Can Linux report IP conflicts?

If a Red Hat or other Linux host has a conflict with an IP address, is there a way to have it display a warning message on the console or in a log, like Windows and MacOS do? i.e. my computer has an ...
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726 views

linux root password security

Is there anyway to protect root password. As people know to change root password through single user mode. How can protect that no one can change password of my machine through single user mode.
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5answers
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Script to delete files older than 30days

Shell script should not delete any files under* root dir*. My* path will be like /export/home/ftp/ ... I did some research and figured out the way for finding and deleting the files older than 30 ...
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4answers
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How to install gparted on CentOS

I tried yum install gparted It says no package found. Can I install rpm packages in CentOS or is that only for RedHat? I mean, if I have rpm for RHEL, can I install it on CentOS 5?
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3answers
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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 ...
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4answers
1k views

Accidentally ran chmod 775 -R / (not ./) on linux server (RedHat)

I accidentally ran "chmod 775 -R /" instead of "chmod 775 -R ./" and changed the permissions for everything and now the server is broke. Anyone know how I can quickly fix this???
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3answers
118 views

Local and remote servers with different Linux distros?

I'm running a remote web server on Red Hat Enterprise Linux and want to host a local server with a copy of my LAMP web applications for in-house development. Is there any reason that I would need to ...
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2answers
307 views

Which Red Hat / CentOS updates should be applied and on what schedule?

I'm subscribed to the CentOS-announce mailing list and I've read the definitions of the various severity tags such as Critical, Important, Moderate, Low, BugFix, etc. but I'm still unclear as to what ...
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5answers
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Reboot fails on RHEL 6.1 after kernel update on Amazon EC2

Everytime I start a new RHEL instance, I like to perform a yum update to start with the most up-to-date system. However, everytime I try to reboot the instance after that, the instance never goes ...
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3answers
141 views

versioning system with less duplication of data

We have a homegrown config management system and we'd like to add config file versioning to it in a simple way. My first thought was svn (or similiar), but I'm concerned with creating a repo in one ...
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2answers
7k views

How do you only tar files in a directory based on a specific file name?

I want to create a tar ball and include only the files in the directory that start with a specific filename. For instance I have apples-x.x.x and oranges-x.x.x, and I only want to tar the files ...
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4answers
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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? ...
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4answers
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yum claims python isn't installed

Trying to install collectd, but for some reason it claims python isn't installed: yum install collectd Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile Setting up Install ...
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2answers
909 views

sudo -i but keep current working directory

When use sudo -i I will simulate login as root, and current working directory will be jumped to /root. Is it possible not to jump and keep the working directory unchanged?
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2answers
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VMXNET3 performance on Linux on ESX 5.0

What kind of performance can I expect from VMXNET3 adapter when running two Linux guests on the same VMware ESX private network defined between those guests? I use VMXNET3 adapter for communicating ...
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1answer
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How to a2ensite and a2dissite?

I'm logged into a Linux server. I think it's a Red Hat distribution. The commands a2ensite and a2dissite are not available. In the /etc/httpd directory, I don't see any mention of sites-enabled or ...
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418 views

RHEL: What happens when memory starts to fail?

I'm getting ecc warnings from some server RAM. It's a pretty old machine so there isn't any warranty on these parts. If this were Windows I would expect to see BSOD. What can I expect from RH5.x?
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How do I get ec2 Linux instance info while logged-in on the command-line (public dns, AMI, etc.)

I want some way of identifying which instance that I'm on when I ssh into a Linux ec2 instance. I would like to be able to uniquely identify the instance from the command-line and correlate this to ...
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2answers
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iptables redirect local connections to remote system / port

I am trying to use SSH to port forward windows machines local port 3389 to a redhat server on some arbitrary port (in the unprivileged region) I have protected behind a firewall, then forward the ...
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2answers
5k views

Enforcing that passwords contain a certain mixture of characters on Red Hat Linux or CentOS

On Red Hat Linux or CentOS, how can one enforce that passwords consist of a mixture of alphabetical and numerical or special characters?
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4answers
717 views

How do I Control the Ordering of Network Interfaces?

I'm attempting to configure a machine with 3 NICs, the first two are built-in GbE controllers, the third is a 10GbE controller. Via NetworkManager, I've configured the 'first' GbE NIC (which at the ...
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2answers
208 views

Switching yum from RHEL to .. something else? [duplicate]

My various managers have decided that it's too expensive to keep paying for a subscription to the RedHat network for OS updates. Is it possible to switch to Fedora/CentOS or do I need to reinstall the ...
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1answer
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What exactly do --limit 1/s and --limit-burst mean in iptables rules?

centos 5.x I'm trying to wrap my mind around the following iptables rule on one of my servers: -A RH-Firewall-1-INPUT -p icmp --icmp-type echo-request -m limit --limit 1/s -j ACCEPT On another ...
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1answer
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Interpreting Munin graphs showing available entropy and MySQL slow queries in sync

We're experiencing performance issues on our website, and after reviewing our munin graphs, the only metrics we've found in sync are Available entropy and MySQL slow queries, with the latter ...
4
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1answer
178 views

Convert Oracle enterprise to redhat

Has someone converted successfully a running Oracle Enterprise Linux server to redhat enterprise and was able to register it on RHN network? Tried to install kernel from redhat, updated the rhnsd ...
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3answers
611 views

SFTP access akin to jailed shell

I have a question about creating a user with sort of jailed shell access (actually all is required of this user is an sftp access to one particular directory). Scenario is as follows - I have an ...
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3answers
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Update RHEL Servers without Internet Connection

I plan to have a few servers installed with RHEL, but the servers will not have Internet connection. Is it possible to update RHEL servers without Internet connection? Can I download the updated ...
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3answers
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Changing the timezone on a RHEL5/CentOS system

How do I change the timezone on a RHEL5 system? I'm reading the instructions here - http://www.cyberciti.biz/faq/howto-linux-unix-change-setup-timezone-tz-variable/ But they seem very bold (altering ...
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3answers
5k views

sssd vs nslcd for RHEL-5/6

We have 50 RH-5 machines and 70 RH-6 machines. I am looking to decide what we should use for LDAP: nscd/nslcd for all RH-5/RH-6 servers nscd/nslcd for RH-5 servers, sssd for RH-6 servers sssd for ...
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3answers
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Exclude a specific repo from YUM Update

I am doing a system wide yum update on RHEL 5.5 and the IUS EPEL repository is throwing a missing dependency error: php53-mcrypt-5.3.3-4.ius.el5.x86_64 from installed has depsolving problems --> ...
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1answer
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Redhat Linux Kernel what does GA mean?

When Redhat release a new major version such as 5.3, 5.4,5.5 .. the kernels seem to be referenced as GA , what does GA stand for ? example in this info doc ...
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2answers
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glibc 2.7 on CentOS 5.5?

I'm trying to run a program that requires glibc 2.7, but I'm running it on CentOS 5.5. Is there any way to do this? I can't upgrade to CentOS 6.
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1answer
197 views

How can I remove “Red Hat Network Code” from the RedHat?

The question is: How can I remove "Red Hat Network Code" from the system and what this "Network Code" actually is? The background of this question is related to the RedHat subscription as according ...
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2answers
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How to Increase the Size of an XFS File System?

I just created an Amazon AWS EC2 instance running RHEL7: [root@ip-10-184-161-46 ~]# cat /etc/redhat-release Red Hat Enterprise Linux Server release 7.0 (Maipo) [root@ip-10-184-161-46 ~]# And even ...
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1answer
1k views

Varnish does not recognize req.hash

I have Varnish 3.0.2 on Redhat and service varnish start fails after I added vcl_hash section. I did varnishd and then loaded the vcl using vcl.load vcl.load default default.vcl Message from ...
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Update Red Hat Enterprise Linux's Packages Only To Specific Point Release

Let's say that I have one RHEL6.2 64bit server running. Current latest version available is 6.4. Running "yum update" will update my server up to 6.4 straight away. What if I want to update only to ...
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1answer
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How do you create an ssh key for the apache user on Redhat?

As the question asks, how do I generate an ssh key for the user apache on Redhat? My use case, is that we have a mercurial server running under the apache user. We also have several web servers ...
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How to Update Red Hat Enterprise Linux 5.4 using CentOS Repos

I don't have a subscription for RHEL anymore and I want to update my server. Can anyone tell me How to Update Red Hat Enterprise Linux 5.4 using CentOS Repos ?
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Limiting resource usage per user in Red Hat Linux

I need to limit CPU, memory and network bandwidth usage for a bulk of processes on per-user basis. User is in fact just logic grouping for several daemon processes and not real humans. So different ...
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2answers
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Resizing of volumes used as VMWare NFS datastores causes Linux VM issues

We had to perform a live volume resize of an NFS datastores VMWare uses on our Netapp. All of our Windows VMs were fine after the resize. However, some of our Linux VMs had issues. Some Linux VMs ...
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1answer
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Mounting a disk from SAN (RHEL 5.9)

Storage admin told me he put a 3TB drive on my server from the SAN and I was asked to mount it. The only information I know is that it's on LUN 1 and that the disk is 3TB. Multipath is setup and I ...