Red Hat Enterprise Linux (RHEL) is a commercially supported Linux distribution.

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Equivalent of openvswitch-brcompat on Fedora/RHEL/CentOS

On Debian & Ubuntu, the openvswitch-brcompat package will install Open vSwitch bridge compatibility support. Is there an equivalent package on Fedora-based distros like RHEL and CentOS?
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2k views

How does RPM handle file locations?

I am trying to create a .spec file for creating mapserver as an rpm package. I am building on an RHEL6 64-bit server. I am a bit new to the whole concept, so bear with me if I am not seeing something ...
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3k views

Error building Oracle client 11g R2 on RHEL 5.5

We are trying to install oracle 11g R2 64 bit in Rhel 5.5 machine ( 64 bit ). Kernel version is 2.6.18-194.el5. We are getting the below error while installation. error in invoking target 'mkldflags ...
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1answer
216 views

How to create LV

I want to create some LV in my VG I have this: LV Name /dev/vg_appli/lv_grt LV Size 10,00 GB LV Name /dev/vg_appli/lv_sap LV Size ...
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1answer
5k views

What is the IPV4_FAILURE_FATAL ifcfg directive and under what scenarios would I want to use it?

CentOS / RHEL 6 I recently learned that there's a ifcfg directive called IPV4_FAILURE_FATAL exists for use in the files located here: /etc/sysconfig/networking-scripts/ifcfg-*. But I'm having a ...
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Error 404 Munin page not Found

I installed Munin and munin-node on Server and httpd was already installed. But after installed when i run the munin-node the Browser gives me this error. Not Found The requested URL /munin was not ...
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1answer
764 views

Yum can find a package, but can not install it

How is it possible? [root@server1 ~]# yum search diy Loaded plugins: product-id, rhnplugin, security, subscription-manager This system is not registered to Red Hat Subscription Management. You can ...
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1answer
771 views

RHEL - permanently unmask all sub-folders and files

I'm new to RHEL, and I'm having issues unmasking a collections of directories. I have a folder where content will be generated content from a python script. The subfolders will exists for a period ...
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2answers
1k views

Hugepages in linux - how to make sure that java process will start using hugepages

I'm running java server on Red Hat Enterprise Linux Server release 5.9. Recently I started to use HugePages as it has some advantages I would like to use. System was configured correctly (as many ...
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2answers
2k views

Does Yum have an equivalent to apt / aptitude's DEBIAN_FRONTEND=noninteractive?

On Ubuntu you can use something like this: export DEBIAN_FRONTEND=noninteractive sudo -E apt-get update Which will prevent things that require input (choosing grub versions or conflicts between ...
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198 views

How to generate kernel crash dumps? [duplicate]

I have X running on terminal 1 and terminal 2 on my RHEL 6.4 system. If i randomly switch between tty1 and tty2, the system crashes. I need to generate crash dump file to analyze the issue. How can I ...
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61 views

What alternative backends does sudo support and how is it configured?

When preparing for the Red Hat Certified Engineer certification examination, I came across this quote in my study notes about the sudo command. By default, the policy is maintained as a flat text ...
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1answer
5k views

Switch between windows & tabs in Linux? [closed]

do we have keyboard shortcuts to switch between tabs or windows, am looking for shortcuts similar to of those available in windows (ctrl + tab to switch btw tabs & Alt + tab to swtich btw ...
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1answer
1k views

How to use 32 bit compiled shared object (.so) file on 64 bit RHEL?

I have a shared object file libfault.so for my 32 bit compiled application on RHEL 6.4. I want to preload this file while starting my application. I have placed it in /usr/local/lib/ directory. But ...
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1answer
2k views

Cannot create new service with xinetd in RHEL6

I've installed the Nagios on My RHEL 6.4(x64) machine. and i added one more module name called "NSCA" for some central monitoring solution.so the setup required add NSCA service detail under xinetd. ...
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1answer
190 views

Gibberish Characters in Redhat

On one RHEL Server I installed Arabic Language support but if browse some Arabic or Urdu Language sites it is showing gibberish characters. So I downloaded some fonts and copied them under ...
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2answers
2k views

How to prevent fork bomb?

To prevent fork bomb I followed this http://www.linuxhowtos.org/Tips%20and%20Tricks/ulimit.htm ulimit -a reflects the new settings but when I run (as root in bash) :(){ :|:&};: the VM still goes ...
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1k views

Temporarily change time

I need to test aspects of my software that only happen at certain times of the day. Rather than waiting whole days (and getting here at 2:00 AM), I'd like to change the time. But I'd rather not ...
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1answer
215 views

How can we make the server overloaded? [closed]

In college systems, the server running the rhel, and the nodes which are used by the students are running the windows xp are connected to the server by LAN cables. But I want to slowdown the server, ...
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2answers
1k views

how to add line in a /etc/sudoers file with the help of shell script (50servers)?

Anyone can help me with shell script, I want to know script which can edit /etc/sudoers file and let me add {{{{{userid ALL=(root) ALL}}}} to 50 server I have on same network?
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1answer
1k views

problem with installing packages

I get these messages when I run this command: # yum install pcre pcre-devel php php-common php-gd php-cli php-mysql flex bison Loaded plugins: product-id, refresh-packagekit, security, ...
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1answer
685 views

How can I make the eth1 up and always available for remote access, where eth0 will be used for host to host IPSec VPN?

I am running Amazon EC2 instance with Red hat enterprise linux, where I have two network interface. Now: eth0 is currently active having public ip where I am remotely logged in via SSH, to ...
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1answer
1k views

Can I use yum to manage a “package” installed from source

I am running CentOS 5.5. I need to upgrade some packages to newer versions, unfortunately they're not available. I am stuck building from source. Is there a simple way to use yum to manage ...
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1answer
1k views

Attempting to detect acceptable LDAP base DN defaults for various directory servers in a bash script

Basically, I'm writing a script that determines an acceptable default for a base DN when pointed at a particular hostname. I'm wrapping it around ldapsearch output. I can do Active Directory by ...
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3answers
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How can I get TLSv1.2 support in Apache on RHEL6/CentOS/SL6?

I'd like to have TLSv1.2 support in Apache on my Scientific Linux 6 (RHEL6 rebuild) server. Is there some semi-supported pathway to getting this working? Preferably with minimal custom rebuilding. ...
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428 views

How do I configure the driver for eth0 so I can use a kickstart file over the network?

I am trying to use a kickstart file hosted over the network to install Oracle Linux 5.8 (equivalent to RHEL 5.8 I believe). I am using the following at the boot prompt: linux ks=http://1.2.3.4/my.ks ...
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1answer
71 views

CentOS - acts abnormal every week and causes my whole setup to be down, how can I rollback / restore back to one week?

I have CentOS and Red hat enterprise Linux running, where I have now working Google Apps Engine and related other Python web applications. Every week or depending on any Google Apps Engine latest ...
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2answers
17k views

With SSH X11 forwarding (`ssh -X`), get `Can't open display` trying to run X applications

I'm able to login to sever using ssh -X Hostip but when i run the command xclock it give me this error Error: Can't open display: localhost:11.0 I check my Display value using echo $DISPLAY ...
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126 views

RHEL6 LDAP client not listing all the groups

Using sssd I have a RHEL6 client configured to login using LDAPS. The login works, but if the user logged in is assigned to more than 1 group at the LDAP level, groups only returns 1 group? Could I ...
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1answer
436 views

Thread id on different linux distros

We have a server application which runs fine on ubuntu and the old Mandrake linux, but it consistently fails on Redhat Enterprise Linux (to be precise RHEL 4 Update 8, kernel 2.6.9-89). On RHEL the ...
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4k views

mount.cifs is giving Permission Denied Error

Im trying to mount the Windows Share on one of Our Redhat 5.9 Server. I use this command mount -t cifs //hostIP/Folder /share2 -o username=alpha,password=blahblahblah And mount.cifs //hostIP/sales ...
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219 views

Samba Shared Folder

I want to share a folder on my RHEL to all windows users. My requirements are: users need to access from windows users need read only access no authentication required What I have tried: Samba ...
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2answers
9k views

df command not showing correct values

This is a RHEL server, I'm running a MySQL server on it, the database and log files (however, logging is disabled) are located on the /srv directory where plenty of space is available. Recently I had ...
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2answers
622 views

When running to a run level does it execute previous run levels?

If I tell my system to go to run level 3 does that mean that it first runs through run level 0, 1, 2, and then finally runs through run level 3? I thought the answer to this question was yes. But ...
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2answers
2k views

How to control thinkpad_acpi via procfs, RHEL 6.4

I'm having trouble with the thinkpad_acpi module on my Thinkpad T400. While the processor temperature can vary, depending on the CPU activity, from 40 to 85 deg. Celsius, my fan speed remains almost ...
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4answers
21k views

Pseudo-terminal will not be allocated because stdin is not a terminal

I'm trying to set up automatic SSH hopping through a server which doesn't have nc. This works from the command line: ssh -A gateway ssh steve@target (I have added my public key to the SSH agent). ...
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1answer
1k views

Install RHEL 5.7S on machine with 4TB disks

I'm getting errors about GPT when installing OS using kickstart. The Dell R720 has 8x 600GB SAS. I can't figure out what to configure in BIOS and kickstart file. In BIOS, there're boot options of ...
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1answer
959 views

How to Install all the default packages by group Using the Local YUM repo

I created a Local HTTP YUM repo. I can install the individual packages. But is there a way to install packages in the available groups? When I tried to install using groups, it give me this message: ...
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1answer
183 views

Port configuration does not work as exptected

I have a Router and four computer connected as the local network. IPs: Router(192.168.8.1)(internet ip:125.119.203.127) server1(192.168.8.3) my computer(192.168.8.8) ...... The ...
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1answer
757 views

CentOS vs RedHat on hp DL 380 G5

hp lists downloads for: » Red Hat Enterprise Linux 5 Server (x86) » Red Hat Enterprise Linux 5 Server (x86-64) » Red Hat Enterprise Linux 6 Server (x86) » Red Hat Enterprise Linux 6 Server ...
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1answer
398 views

How to stop Western Digital External HDD from Sleeping

I have one Western Digital External HDD(2TB) connected to Redhat Server with the Partition type Ext3. But I noticed that it goes to 'sleep' mode if no one is accessing it. So if I try to access it, ...
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341 views

unable to ping gateway and CLAN in Linux but pingable in Windows PC

We're installing RHEL 5.5 for our Voice Portal (Avaya). After configuring the IP address, gateway IP, and netmask we tried to ping it so we could see if it was pingable/active or not. Sadly its ...
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1answer
658 views

how to add shortcut keys to custom.desktop in RHEL6?

i have created custom.desktop in the /usr/share/xsession directory for launching single application. i want to add one or two desktop shortcuts along with the single application.
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1answer
387 views

GNU screen startup is really slow

I connect to a RHEL 5.7 server via Putty or VNC (not sure it matters) but when I try to run screen, it takes forever (on order of 20-30 secs). Same thing if I run screen -ls, takes just as long. I ...
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2answers
283 views

How to mount remote file system

I want to mount my Windows NTFS share C:\ to Linux ext4 file system, so I can see the file system tree as part of my Linux file system and transfer my files. PS. I am using rhel6.
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1answer
6k views

What to do after the LUNS are created

Our Management bought a New EMC2 VNX storage device . And a guy from vendor came to create the LUNS. I honestly have no idea how to configure the EMC SANS as i never got a chance to work on such ...
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1answer
289 views

How do i change the password for root using webmin, where i have no more access as root?

I changed the root password, using webmin it shows me successfully done. $ uname -a Linux .com 2.6.18-194.11.4.el5 #1 SMP Tue Sep 21 05:04:09 EDT 2010 x86_64 x86_64 x86_64 GNU/Linux $ echo -e ...
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1answer
609 views

Changing drives in FTP

I am using RHEL6 and I connect to FileZilla FTP Server in Windows 2008 Server which has more than 10 drives. I have access to all of them but for my user C:\ is Home Directory. I want to change to ...
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How to set CONFIG_PREEMPT_NONE in RHEL 6.4 (linux)

I am trying to tune the RHEL6.4 Kernel to handle server style load for of my application. With RHEL 6 scheduler has been changed to CFS and with RHEL 5 my application works fine. I would like change ...
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2answers
4k views

What files does authconfig modify on RHEL?

I am trying to allow RHEL to use login accounts that are created on the system, but use the passwords from Active Directory. I have seen someone use: authconfig \ --enablekrb5 \ ...