Red Hat Enterprise Linux version 5 is a Linux distribution sold by Red Hat, Inc. for the enterprise market.

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How to diagnose storage system scaling problems?

We are currently testing the maximum sequential read throughput of a storage system (48 disks total behind two HP P2000 arrays) connected to HP DL580 G7 running RHEL 5 with 128 GB of memory. Initial ...
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2answers
279 views

Should swap space be in a logical volume, or directly on disk?

What are the benefits of putting swap into a logical volume over using direct disk access? For example, with a fresh, default install of RHEL5 or 6, a volume group is created on the default disk ...
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2answers
2k views

MultiPath configuration on RHEL5 and Clariion CX-300

I have problem with discovering my FC-connected CX-300 storage. Frankly speaking I'm complete novice in FibreChannel, so step by step explanation would be appreciated. My configuration consist of two ...
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1answer
286 views

Strange files in /tmp/

I have never seen this files in RedHat before. /tmp/orbit-root /tmp/ssh-KEskO14981/agent.14981 /tmp/keyring-OuVrZn/sock What could it be?
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2answers
564 views

hostid command not returning consistent hostid on RHEL 5.6 server

We have two newly built RHEL 5.6 x86_64 servers which are part of an Oracle Database Cluster. One is named CMORAC1 and the other CMORAC2. The primary IP Addresses of both servers are 10.100.9.144 and ...
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2k views

Redirecting Syslog events from RHEL 6 to RHEL 5: is it possible to provide with the same event format?

For some reasons, we redirect syslog events from RHEL 6 (with rsyslog) to RHEL 5 (with syslogd). On RHEL 6 in rsyslog.conf: *.* @10.30.46.211 On RHEL 5 in /etc/sysconfig/syslog: ...
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2answers
620 views

After applying patches and rebooting, RHEL 5.3 hangs on udev

I suspect that one of the packages in the last system updated is causing problems with the system rebooting. When I reboot, the server hangs on udev. Here are a list of the updates that preceeded ...
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1answer
335 views

How do I get trac 12.2 to work on RHEL5's httpd with CollabNet SVN 1.6.17 (which has its own httpd)?

I installed CollabNetSubversion-client-1.6.17-1.x86_64.rpm, which installs httpd v2.2.19 # /opt/CollabNet_Edge/csvn/bin/httpd -v Server version: Apache/2.2.19 (Unix) I installed Trac-0.12.2.tar.gz. ...
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5answers
841 views

How can I move a process to a core or dedicate a process to a processor?

I have an Intel E5620 processor. I have used cat /proc/[pid]/stat to determine what processor the process was last run on (39th field). How can I ensure that a process is dedicated to a processor (I ...
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2answers
341 views

How to handle large numbers of connections from an IP address?

Every couple of weeks we have an issue whereby a single IP address opens a huge number of of Apache processes at the same time. It seems to connect to similar pages each time, but our Apache ...
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1answer
64 views

create a specific directory within each directory in bash

We're running an application on RHEL and it is trying to write a mysterious log file to a directory that doesn't exist. I'm trying to determine a find command that could go through each sub-directory ...
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1answer
341 views

Install/Update a package on RHEL5 from CentOSPlus repo with same package existing in RHN

I'm trying to install postfix with MySQL on RHEL5 but the repos from the rhnplugin are overriding it even if i have an exclude line in the rhnplugin.conf file My goal is to only use the CentOSPlus ...
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1answer
223 views

Access Vista Share from RHEL 5.3 Server - mount error 110

I am trying to access a file share on a Vista box from a RHEL 5.3 server. The Vista box is part of a domain, but it has two NIC cards. One is on the 158.x.x.x network. The other card is on the ...
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4answers
4k views

How to fix the entropy pool issue with RHEL 5.x

RHEL 5.x has an entropy-generation problem (held-over from kernel 2.4). Following directions from here has produced little-to-no results: How to increase entropy pool on a 2.6 kernel RHEL/Fedora ...
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1answer
82 views

Adjusting Linux Group Access

I have created a group in RHEL with one user in it. This user will need full rwx access to /home/anotheruser/ ,recusively. How do I change the user/group permission to allow that user/group to rwx in ...
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2answers
534 views

RHEL 5 server hang, which logs

I have a server which is hanging more times than I would like, are there any logs in particular that would be worth examining to determine the reason? /var/log/messages has nothing of note ...
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4answers
2k views

Linux: disabled user accounts: Is there a non-root shell command that can show if an account is disabled or not?

Is there a non-root shell command that can tell me if a user's account is disabled or not? Please note that I make a distinction between LOCKING and DISABLED: LOCKING is where you prepend ! or * or ...
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4answers
913 views

RHEL5 Run script on Server's first boot

How can I run a script on the first book of my rhel 5 server after install. I am using post kickstart tasks to create a script and I'd like to run it the first time the server boots. How can I do ...
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1answer
99 views

Determine ArcGIS version for on RHEL machine

I have a machine that is running arcgis but can't determine what version it is. The documentation I have found so far has been fairly sparse especially with regards to the linux server version of the ...
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3answers
439 views

Creating more space for MySQL with new mount

I'm using a cloud CentOS 5 instance and I realized that I left the default partitioning in the beginning. Everything on / is mounted already on hda that is about 10GB. The other drive (sda) is about ...
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2answers
712 views

Cannot find ssl libraries when configuring stunnel

I am using RHEL 5.6 and trying to install stunnel with the 'xforwardfor' patch from haproxy to get a setup similar to this (older) post: ...
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1answer
544 views

Finding the LVM root volume while in the Grub 0.95 CLI without access to the grub.conf file

If I have my root device is a LVM logical volume, how can I figure out the path via the Grub CLI without access to the original grub.conf file? This is for use in the kernel command's root and ...
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1answer
227 views

Run CherryPy script with Python2.6 rather than Python2.4 on RHEL

Working on a RHEL 5 server. Trying to make a small CherryPy app that takes in arguments from the url (ex. internet.com/cherrypy/data/22/45 would return 22 and 45) and then use that to query a SQL ...
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1answer
215 views

Problem building pyodbc on RHEL5

I'm trying to build the python module pyodbc on a RHEL5 server. I've downloaded the source directly from the pyodbc google code page. Whenever I run the python setup.py build command, I'm greeted ...
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2answers
27k views

Upgrade CentOS 5.x to CentOS 6.x - tips and techniques

Now that CentOS 6.0 is making its way to the various mirror sites, I wanted to solicit opinions on the upgrade process. In working with the commercial RedHat 5.6 and 6.x distributions for the past few ...
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0answers
147 views

2 diferent versions of gcc in RHEL

I need to test a matlab EDA-LINK with Cadence Incisive. For this , one of the libraries complains of an error: version `GCC_3.3' not found (required ...
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2answers
1k views

Is there a way to disable the ptrace system call on RHEL5 Linux?

Is there any wat to disable the ptrace system call on RHEL5?
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1answer
551 views

SIOCSIFFLAGS: Resource or Device Busy

Have a Dell PowerEdge 2350 with dual nics built into the motherboard. eth0 works fine. Setting up an IP under eth1 results in the error: "SIOCSIFFLAGS: Resource or Device Busy". I have two ...
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2answers
909 views

Building nginx 1.0.4 on Amazon EC2 micro - perl and python problems

I'd like to run nginx as a reverse proxy with apache2 on my EC2 micro instance. yum install nginx gives me nginx-0.8.53-1.2.amzn1.x86_64.rpm The current nginx is 1.0.4 I found and followed this ...
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2answers
582 views

RHN won't update currently entitled RHEL v5 server

I recently purchased RHEL v6 so I was able to get entitlements on my recently upgraded RHEL v4 machine to v5 (v6 is down the road currently). However, in the web interface I run the updates, it fails ...
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139 views

Not able to install Statistics::Basic on RHEL5

I am trying to install the perl module Statistics::Basic::Mode on a RHEL 5 system and am having issues. I have tried MCPAN and RPM. Here is the result of running sudo perl -MCPAN -e shell > ...
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1answer
322 views

Is “yum groupinstall” compatible with Red Hat Network?

On CentOS 5, I run yum groupinstall "Development Libraries" to install the commonly used development libraries. Can I use the same command on a RHEL5 server with RHN? Is the "Development Libraries" ...
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2answers
585 views

Resizing swap partition (RHEL 5.x)

Following is how parted print looks like: (parted) print Model: VMware Virtual disk (scsi) Disk /dev/sda: 26.8GB Sector size ...
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1answer
466 views

How to include mod_ssl into httpd on rhel5.4

I'm trying to get apache running over https with mod_ssl on a rhel 5.4 x64 machine. I don't have mod_ssl.so in the modules directory, nor can i find any ssl type output from httpd -M or httpd -l. ...
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0answers
618 views

Using automount on RHEL5, why are variables in the auto.master never expanded?

I'm migrating from NISPLUS to LDAP (openldap) and from RHEL4 to RHEL5. The LDAP server is running on RHEL5u4 as are the clients. On RHEL5 variable expansion in auto.master never works, whether in ...
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1answer
4k views

CentOS 5 - realtime patch

Where can I download precompiled CentOS 5 kernel including realtime patch? Or I need to compile it myself (if yes, how to do that)?
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3answers
399 views

RHEL file permissions

I added a file in /etc/init.d but noticed that the file isn't a green color like the other files when I do a ls -l What should I do to make it "green" or add the necessary file permissions? Why are ...
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3answers
2k views

Configuring open LDAP on RHEL 5.5: slappasswd command not found

I am trying to install open LDAP on RHEL 5.5. I have LDAP 2.3.43 pre installed, I am trying to change password of LDAP root user using command slappasswd But when I run this command I get following ...
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2answers
1k views

RHEL5.5 yum can't see a package (xen) on repo?

hi i'm trying to install xen via yum on RHEL 5.5. When i browse the repo here: http://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/ I can see the package i want. specifically ...
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2answers
1k views

“Access denied for user 'root'@'servername' (using password: NO)” - except I AM using a password

This is weird. Our web server is running RHEL 5.5, and has the MySQL client version 5.5.10 installed (just updated from a 5.0 build, which was having the same problem). When I connect to the database ...
2
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1answer
1k views

error from 'yum list <package>' - up2date client abuse?

I recently added a server to our network. After a normal RHEL5 installation I added a number of packages via yum. This was about 2 weeks ago. This morning Im looking for something in yum and tried ...
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2answers
566 views

OCFS2 updating procedures

We plan to use OCFS2 in a project running Red Hat Enterprise Linux (RHEL) 5.6 because we found OCFS2 to be much simpler to set up than GFS. I am, however, worried about the upgrade process since I ...
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4answers
8k views

How to start / stop proftpd

I can't seem to find a way to stop / re-start proftpd. My server IP address is xx.yy.zz.ww and connecting from external devices via FTP gives me the prompt: Connected to xx.yy.zz.ww 220 ProFTPD ...
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1answer
453 views

Cannot get xinetd to start on a RHEL server

When I try to execute /etc/init.d/xinetd start I get the following error: Starting xinetd: /bin/bash: /usr/sbin/xinetd: cannot execute binary file ...
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2answers
2k views

OVF disk formats

I thought that VMs exported as OVF were supposed to be completely portable, but now I see there are difference disk formats I used the VMware ovf tool to export a VMX to OVF. The disk file created ...
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1answer
240 views

Prevent dot-release upgrade of RHEL while still patching flaws

I am running RHEL 5.4, and cannot update to 5.5 or 5.6 because of a restriction by the vendor of a software package I need to run on the server. However, it seems that most of the tools that manage ...
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3answers
2k views

How to chroot Apache on CentOS?

I have been advised by a sysadmin, to run Apache in a chroot jail, in order to prevent that an attacker could take control of server. So my question is: What is the best method to chroot ...
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2answers
266 views

Odd behaviour of gettimeofday on RHEL5 server

I'm experiencing very odd behaviour from Time::HiRes on RHEL5. Since Time::HiRes is in the Perl standard installation, and is basically a wrapper around the gettimeofday system call, I'm inclined to ...
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3answers
945 views

Time is off in Zabbix graphs

I have two instances of zabbix running on two different RHEL servers. Data presented in web user interface on one are off by 2 hours and on the other by 3 hours (ahead). For example instead of 15:00 ...
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4answers
440 views

cron clock problem

I have noticed on my RHEL 5.5 that cron daily starts an hour later (at 1AM instead of midnight). System and hardware clock are the same. How can i set it so it will start at midnight? date [root@a ...