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2
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2answers
4k views

How do I (or is it advisable) downgrade Redhat Enterprise from 5.9 to 5.8 and find out when the original upgrade happened?

Two fold question. How do I find out when the upgrade from 5.8 to 5.9 happened? Where is this logged? What is the process of rolling back or downgrading from 5.9 to 5.8? Background: Supporting a ...
0
votes
2answers
230 views

Extending root partition of RHEL running on vSphere 5.1

I need to extend the root (/) partition of a RHEL linux. I know I can do this without too much difficulty by booting in rescue mode. The problem is : the RHEL is a virtual machine running in vSphere ...
5
votes
1answer
828 views

How to check if an IP address is free on a network

I'm gonna setup a Wireless router for a customer. They have subnet 10.253.48.0/24 What can I do to check if the IP 10.253.48.243 is available to set up the router? I'm on out on a local network at my ...
-2
votes
1answer
147 views

how to increase HD in RHEL 5 within VMware

I have increased the HD from the setting of VMware while the rhel was shut down. I increased it to 20 GB (before it was 5 GB). But the problem was There is no free allocated space !! please tell me ...
1
vote
1answer
520 views

RHEL 5.8 LDAP pam_groupdn customisation

I have a given LDAP-Server I want to use for User Authentication on my Red Hat Enterprise Linux 5.8 Server. I got the connection to the LDAP-Server working and I'm able to Login to the Linux Server by ...
-1
votes
2answers
1k views

Why does Centos 6 have an older kernel than Ubuntu 12.04 [closed]

Hi can some one help me in understanding this. On Centos 6.2 its showing kernel as 2.6.32-220.el6.x86_64 whereas on Ubuntu 12.04 its showing as 3.2.0-23-generic. 3.0 kernel is one of the latest ...
1
vote
3answers
639 views

Linux SMP Kernel Ram Utilization

I have a linux machine with Redhat 32 bit SMP Kernel installed , the ram size of machine is 16 GB and processor architecture is 64 bit. Please clarify my doubts on this setup : Can OS use the 16GB ...
2
votes
2answers
3k views

yum-plugin-priorities: Which packages are excluded due to repository priority protections?

I am using multiple third party RPM repositories. Since these repos contain packages with conflicting names, I am experimenting with yum-plugin-priorities to sort out the confusion. When I run yum ...
3
votes
3answers
3k views

RHEL 6.3 Upgrading OpenSSH & Apache

We just ran an external security scan from 403Labs against one of our servers (RHEL 6.3 x86_64) for PCI compliance and the results appeared to mainly dictate that we had a hand full of applications ...
33
votes
5answers
8k views

How do admins maintain user accounts across hundreds of linux servers?

Dealing with hundreds of RHEL servers, how can we maintain local root accounts and network user accounts? Is there an active directory type solution that manages these from a central location?
0
votes
1answer
162 views

Remote server administration on a large scale

I need to remotely manage virtual machines (many of them) via secure channel. SSH inbound is disabled. Anyway to use some web based tool running behind SSL. It will be used to push updates, config ...
1
vote
2answers
2k views

How to configure the tiger VNC in RHEL 6 to enable remote login after reboot?

How to configure the tiger VNC in RHEL 6 to enable remote login after reboot? Currently, I could remote login to it when it has login already. But if I remotely restart the server, it would not allow ...
0
votes
1answer
3k views

Options for firewall logging in AWS on EC2 instances?

We are looking to implement a logger for our firewall, in the cloud, to log attempted requests and general traffic to and from the server. For general traffic to and from the server the AWS firewall ...
2
votes
3answers
433 views

Keep installed RPMs in sync

What is the best way to keep several CentoS/RH 5 servers keep the same set of RPM's? I.e., when I install or update an RPM on one of them using a common YUM repository, make the other servers ...
-1
votes
3answers
6k views

needs updated glibc package version 3.4.15 or later for RHEL6

I want to upgrade my current running applications to latest version. But due to some package issue i am unable to install them. I get common error in that: /usr/lib64/libstdc++.so.6: version ...
0
votes
2answers
91 views

Linux: Apply ownership to all files created in folder

My first question, so be kind... Basically, I have a folder that a user group has access to. This folder has a program in it that runs as root(via sudo) then outputs result files(xml files) to a ...
1
vote
1answer
3k views

glibc.i686 conflicts with libc6?

I have a 64-bit Redhat Enterprise Linux server (version 6.3) that doesn't want to let me install the glibc.i686 module for 32-bit compatibility. When I try yum install glibc.i686 as root, it gives me ...
1
vote
2answers
1k views

ssl-cert package (self signed certificates) for rpm/fedora

In Debian/Ubuntu, my deb packages depend on the ssl-cert package, to provide some self-signed https certificates, if nothing else. From the Debian page: This package enables unattended installs of ...
0
votes
1answer
1k views

RedHat is not resolving local windows dns entries

On the RedHat box, I can ping a DNS entry only if I include the full name. For example: ping box.example.com works but ping box does not. Strange thing is, I can ping box from a resent version of ...
-1
votes
2answers
477 views

bind9 bogging down server with unknown request

I am running a oracle linux server as an operational box. I've noticed random lockups on VNC, SSH, and web server request. I looked at my message log and see alot of random resolving. [user@SERVER1 ...
10
votes
3answers
4k views

yumdownloader vs repotrack

I'm working on CentOS 6.3. Recently I come across repotrack from yum-utils. yumdownloader --resolve and repotrack looks very similar, but it looks like yumdownloader download only part of ...
4
votes
1answer
1k views

yumdownloader downloads only i686 resolved rpms

Having CentOS 6.3 installed on x86_64. Below I'll demonstrate my problem using parted package. Running: yumdownloader --destdir=001 --assumeyes --resolve parted As a result downloaded the ...
-3
votes
2answers
180 views

crontab -e on Red Hat 4.1.2-48 [closed]

The following command on crontab does not work at all. 0 12 * * * mysqldump -hserverhpost -uuser -ppass db > /path/to/backu/$(date +%d-%m-%Y) I read extensively about this and i cannot see what ...
-1
votes
1answer
67 views

Name-Based Port Redirect

Desired Effect request server1.foobar.com:25565 result server1.foobar.com:25565 request server2.foobar.com:25565 result server1.foobar.com:25566 request server3.foobar.com:25565 result ...
1
vote
0answers
442 views

Enable bcrypt hashes for /etc/shadow in RHEL, CentOS, or Amazon Linux

Is it possible to add bcrypt support for system accounts (e.g., in /etc/shadow) in Amazon Linux? (Which is in turn binary compatible with RHEL5 and CentOS 5) This only looks like a duplicate of this ...
0
votes
3answers
7k views

how to run shell commands from apache (through php )

I'm using redhat 6 I have the following shell commands that I need to run from the webserver (apache -> through php ) that basically move & overwrite a file , kill a process and starts another ...
0
votes
1answer
1k views

Red Hat Licensing Model, a license is needed to run it? [duplicate]

Possible Duplicate: Can you help me with my software licensing issue? I've inherited two Red Hat servers at work. I'm planning on moving them to CentOS to avoid licensing costs. Now, the ...
2
votes
1answer
829 views

How can I fix this Samba setup on CentOS?

I'm trying to set a Samba share in /home/share on CentOS. I do not have great experience with setting up that kind of service. I've been following guides and recommendations here and there, but ...
3
votes
2answers
173 views

Need to know how IPv6 was disabled

I have a RHEL 6.3 server that has IPv6 disabled. If I enter ifconfig I get the following: eth0 Link encap:Ethernet HWaddr 00:50:56:9F:0F:61 inet addr:10.3.72.76 Bcast:10.3.75.255 ...
2
votes
1answer
849 views

Local yum repo for multiple versions

I would like to setup a local repo for rhel 5 and 6. Can this be done on 1 server, or do I need one server for each major version? We have a valid, legal subscription with RH, but we would rather not ...
1
vote
1answer
9k views

RHEL 5 How to set mount location of multipath device?

I have a RHEL5 + 3Par FC SAN storage environment and am unsure how to setup a multipathed FC device to mount to particular location like /data. I have the 3Par Implementation guide for RHEL and it ...
0
votes
1answer
189 views

iptables port redirect not working

I am trying to set up a redirect for 443 to 8443 (non-root app can not use privileged port) using the following: iptables -t nat -A PREROUTING -p tcp --dport 443 -j REDIRECT --to-port 8443 However, ...
0
votes
1answer
71 views

Trying to diagnose bottleneck for apache

I am trying to diagnose bottleneck for a apache(v 2.0.52) server using strace. It looks like call to poll is slowing the process. Below is one example poll([{fd=10, events=POLLIN}], 1, 120000) = 0 ...
11
votes
4answers
35k views

Where is the sshd log file on Red Hat Linux stored?

Can someone please tell me where to find the SSHD log on RedHat and SELinux.... I would like to view the log to see who is logging into my account..
2
votes
2answers
281 views

Potential issues with “yum update ./*.rpm”?

I've got a batch machines to update this week, but I'm not quite confident with our established procedure. It basically runs like so for each machine: Mount a shared directory particular to the OS ...
2
votes
5answers
5k views

Can not access EC2 server via IP address

I am having this problem accessing my elastic public IP for my EC2 instance in the web browser. Installed REDHAT 6.3 and installed nginx web server(up and running) and also made sure i enabled port 80 ...
3
votes
1answer
135 views

Going from source to RPM

I'm curious about the major difference/pros/cons between installing services and tools from source over using RPMs and from repositories. From my understanding using a repo/rpm gives you the ability ...
0
votes
2answers
1k views

Changing network interface names on RedHat

I have a DELL server running RedHat EL 6.3 with two 1G network interfaces, and two 10G network interfaces. Following this note, I have successfully renamed the two 1G network interfaces that used to ...
2
votes
3answers
10k views

How to configure sendmail to relay emails through Office 365 (SMTP) with TLS

I have a box running RHEL 6.3 and there's and application that needs to send out reports by mail, in order for this functionality to work I have to have mail configured in my box. In addition I ...
2
votes
1answer
5k views

How to restart udevd on RH/CentOS system?

For udevd there is no init.d script and manual page is not indicating how to restart it either. The process is holding a deleted file (lsof shows) and I need to release it by restarting udevd. How to ...
-1
votes
2answers
1k views

how to upgrade libvirt?

I'm trying to install openstack on RHEL 6.2. Following installation guide from openstack.org, I'm using the command: yum install openstack-nova openstack-glance After resolved many dependencies, I ...
0
votes
1answer
128 views

Recommended bit type for a Redhat web server - 32-bit vs 64-bit [closed]

I am setting up a Redhat Enterprise 6 web server and have the option to use either 32-bit or 64-bit. The server will have a Xeon 2620 processor and 16 GB of Ram. I don't foresee any individual ...
-2
votes
1answer
49 views

Connecting to Gest ip address usign host alias [closed]

I have RedHat OS running on VMWare Player. My host operating system is windows7. Network configuration i am using on my virtual machine is NAT. I have configured my Guest operating systems ...
0
votes
1answer
148 views

Running drupal as root in order for it to run bash scripts

I store a website on redhat and using drupal. There is a button on the site that activates a php script and that php script use exec to activate bash script on the server. Right now the script is not ...
0
votes
2answers
138 views

What are reasons that a server might hang, when memory and cpu usage are fine?

Some clues: Ping works fine, but website access and utilities such as ssh are slow slow slow! Memory and CPU usage are all at low, tolerable levels. I used traceroute, average result is not over ...
0
votes
1answer
31 views

Besides the httpd.conf, where can the certificate and private key be defined?

I'm updating an SSL Certificate on Apache 2 (redhat 5.6) server with virtual hosts. Normally I would expect to find the directives pointing to the crt and key in the httpd.conf, perhaps within the ...
1
vote
1answer
161 views

No space left on device prevents login

It seems that when you run out of disk space all remote logins are prevented [I'm using Red Hat 4.4]. Apparently this is because all non-superuser logins have to write to /var/log/auth.log This is a ...
2
votes
3answers
2k views

How can I get the git-all meta package on RHEL 6.2

I believe I'm missing some of the common git addons, such as gitk, and I suspect it is because I installed git using sudo yum install git as the information for that package lists: : The ...
3
votes
2answers
8k views

Running SSHD on multiple ports on CentOS release 6.2 (Final)

I am running CentOS release 6.2 (Final). I want the sshd port of listen on ports 22 and 1022. I have add the following lines to /etc/ssh/sshd_config: Port 22 Port 1022 and restarted sshd and ...
0
votes
1answer
389 views

amazon linux installation of rpy2 fails

the installation of rpy2 an amazon linux via sudo pip-2.7 install rpy2 fails with In file included from ./rpy/rinterface/_rinterface.c:58:0: ./rpy/rinterface/_rinterface.h:8:15: fatal error: R.h: ...