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

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How do I run a application on top, in a display manager like GDM.(RHEL 7, Gnome 3.8.4)

I want to show keyboard layout and selection of language at login screen in RHEL 7. I have modified the language menu to show "show keyboard layout" and "Region & Language settings". On clicking ...
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2k views

Is there any sound enhancer/equalizer for Linuxes that are not Ubuntu?

I am looking for a systemwide audio equalizer for Debian, Gentoo or Red Hat Enterprise Linux, i.e. an audio equalizer that filters the entire signal that is sent to the audio chipset, something ...
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181 views

32-bit package from a repo that should only contain the 64 bit packages

Trying to a do install of some packages and it seems that it is trying to pull a 32-bit package from a 64-bit repo. Installing for dependencies: cyrus-sasl-lib i686 ...
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38 views

Connection issues with KVM on RHEL6.5 to Licence Server

I currently have a RedHat 6.5 kvm running under a RedHat 6.5 host. I am attempting to make a connection to a Rational Apex licence server on the local network, however the connection times out before ...
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489 views

Is it possible to convert RHEL to CentOS?

The software vendor that we used has always specified that we should load RHEL on servers we've bought to run their software however they did start to accept CentOS and even now prefer it on new ...
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533 views

links are always NO-CARRIER, but expected to work

At some point I start receiving "NO-CARRIER" error message. What does it mean and how can I fix it? My links are "physically up" - green lights are blinking. On the opposite side link is up, but no ...
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20 views

Can I capture reboot errors on a system that lives in memory?

I have a machine that will intermittently experience boot issues and the system will hang and won't come up. I would normally go to check dmesg, but the problem is the system lives in memory and gets ...
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187 views

Red Hat Enterprise Linux 6.5 remounts root filesystem read-only after hibernating

I have a Lenovo ThinkPad T430 running Red Hat Enterprise Linux 6.5, kernel 2.6.32-431.30.1.el6.x86_64, and my filesystem structure consists of a master LUKS partition holding two logical volumes, one ...
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38 views

network.service - after executing “telinit” network interfaces doesn't start

When I start RHEL 7 everything is fine, my network functions, I can ping other PC's etc: [root@localhost]# service network status Configured devices: lo eno1 enp2s0f0Team enp2s0f1Team team0 team0.300 ...
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27 views

Strange hang while attempting mounting LVM2 in recovery mode

I am running a RHEL 7 vm and I am trying to mount an LVM disk in recovery mode. I can see the disk with fdisk -l. lvscan shows it being active. When I try to mount the disk to the system I see the ...
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103 views

converting teaming to bonding

RHEL 7 contains bond2team tool but it doesn't contains opposite team2bond tool. I need to convert my teaming files to bonding (please don't ask why, this is for testing purposes). This is my teaming ...
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75 views

What is the first event/file/log in linux that appears/changes on boot that signalizes network being up?

I have a vSphere farm with virtual machines and python script that handles cloning and managing of those VMs. I also have a machine (RedHat 6) that I clone if I need a new one. It has a script that ...
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85 views

Compatibilty of the following softwares

I am a professor (Mechanical Engineering department) at a college which is making the transition from Windows to Linux. However, we are quite unsure whether all the CAE softwares that we use would be ...
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465 views

RedHat machine will not boot when video card is removed

I "inherited" RH 6.4 on a computer with an nVidia video card. I took the image and dd'd it to another computer that has the same hardware. By design, the second computer will be headless. This ...
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280 views

Remote Desktop Connection Login Failed, error-problem connecting

I am having a problem remotely logging into my server using remote desktop and XRDP. When attempting to login, I get: Connection Log: -connecting to sesman ip 127.0.0.1 port 3350 -sesman connect ok -...
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585 views

module scsi_wait_scan not found on CentOS kernel-ml causes kernel panic on boot

I am attempting to upgrade from kernel-lt to kernel-ml, following the instructions here, however on boot the console is flooded with module "scsi_wait_scan" not found This leads to a general kernel ...
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329 views

java version not found in redhat

My OS is redhat linux. It's having the default java 1.4.2, but I need java 1.7.45, for that I am trying as follows: /usr/sbin/alternatives --install /usr/bin/java java /u01/java7/bin/java 5 /usr/sbin/...
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407 views

LVM issues and questions

I've got a NAS configured with LVM where one of the volumes is giving errors like this: vgscan reading all physical volumes. This may take a while... /dev/ElkhornC7VG1/idisk5: read failed ...
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4k views

Device already mounted or resource is busy

Issue ::: I install Redhat 5.10 x64 on server which had faulty hdd . I removed the old faulty hdd and installed new one with 500GB capacity and after installation i need to copy some data from old ...
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146 views

how do i build / apply an selinux policy file, on redhat 7?

I'm trying to install RabbitMQ on Redhat Linux 7 (RHEL7). I followed the instructions on the RabbitMQ site, and it installed fine. However, it won't run because SELinux is preventing Erlang from ...
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48 views

Investigating Active MemInfo

I am seeing high Active usage when I do a cat /proc/meminfo : MemTotal: 65965328 kB MemFree: 51640992 kB Buffers: 1050332 kB Cached: 8516112 kB SwapCached: 0 kB Active: 11512732 kB Inactive: 1878028 ...
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269 views

Utility to list and modify kernel modules loaded at system startup

How do I list all kernel modules loaded while system startup? Is there a user space utility to list and modify the modules loaded during system startup? I am working on RHEL6 Desktop and RHEL6 Server....
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144 views

Can't modify or delete SELinux user

I was playing around with user_u in the targeted policy on RHEL 6.5. I'm logged in as root in the unconfined context, so I have full ability to change anything I want. I've also switched to ...
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141 views

Using a VPN client as a VPN gateway

I would like host 1 to use host 2 as a gateway to the remote host 3. I have scoured the web looking for a solution, but it doesn't seem to work for me. VPN client software is ike (shrewSoft VPN) is ...
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91 views

How to set one job to run at precise time with anacron without losing config at next upgrade?

I want logrotate to run at a precise time daily. Currently it is set to run at some random time using anacron and I don't want to change the randomness factor for all the other jobs. I have ...
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249 views

Creating Self signed certificate for tomcat 6

I am trying to configure self signed certificate for our tomcat server. For that initially I created the keystore certificate file using keytool . The command I tried for this is keytool -genkey -...
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177 views

Utilizing Samba Shares Without using Winbind

I am curious if it is possible to use samba shares without using winbind. In our current environment we are using SSSD, Kerberos, and Samba to complete the required tasks such as joining the windows ...
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163 views

File of Doom freezes any computer that attempts interaction

I have a file on an internal server that causes any machine that interacts with it to immediately and irrecoverably freeze. By interaction, I mean just about anything: rm, mv, cp, cat, vi, gedit, less,...
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146 views

Generating Email alert for events in system log

How to generate email alert for every critical event logged in system log /var/log/messages. Suppose, for the following log message, I want an email alert to be generated. Oct 24 11:17:42 eforms ...
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582 views

Using autofs to mount a NFS share

I am trying to setup a RHEL 7 machine with an autofs NFS mount (the NFS mount is a Windows 2012 R2 server running Services for NFS). Here are the contents of /etc/auto.master: /nfs /etc/auto.nfs ...
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361 views

RHEL 6.1 yum hangs on “Updating Red Hat repositories.”

I just registered my RHEL 6.1 system using rhn_register. However, when I try to run any "yum" command, it gets stuck on "Updating Red Hat repositories" and never does anything. BTW I can run this ...
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236 views

How are network and SCSI kernel modules handled differently from other kernel modules?

I used modprobe to load the 8021q.ko module on a server. I expected to have to do this every time the server rebooted until I made it persistent. However, to my surprise, it was loaded automatically ...
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386 views

Yum or Reposync: How can I slowly remove a repository without unintended dependency issues?

I have used reposync to create and maintain local copies of two repositories, remi and remi-test. These are repositories maintained by Remi Collet. On several systems in an internal LAN, I added both ...
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194 views

MongoDB “service” on clean Redhat can not be started

I just bring up Redhat 6.5 64-bit from AWS and did the below things: Disabled SELinux Disabled Iptables All ports opened in Security Group Rebooted Then i just followed, both of the below ...
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124 views

Kexec immediately after Kickstart install (where is cmdline?)

I used to be able to kexec into a new kernel immediately after a kickstart (anaconda) install via pxe. I was able to do this by figuring out the current kernel version, and grabbing cmdline options ...
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552 views

How to configure a “point-to-point” connection with RedHat 6.5?

My servers are hosted at Hetzner and I need to create a point-to-point connection to my gateway. The server can only reach its gateway (and its locally configured) IP addresses directly. All other ...
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62 views

PCI-e SSD - Not visible to sysstat's iostat or sar

I am attempting to get basic statistics during test runs on a server with a PCI-e attached SSD that is mounted on /dev/rssda1, however sar and other sysstat either do not log, or in the case of iostat ...
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565 views

External VGA monitor port not working on HP Elitebook 2540p running RHEL 6.5

I'm running RHEL 6.5 on an HP EliteBook 2540p. When I connect the external VGA port to a projector or external monitor and press Fn+F3 to switch to the external port, nothing happens. Under System ->...
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382 views

Installation from USB fails

I have a pretty old Ubuntu 8.04 machine. The machine doesn't have a DVD reader/writer in it. Challenge: Now, the challenge I am facing is to install RHEL6 in this machine. Obstacle 1: I needed to ...
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4k views

Error: iptables: No chain/target/match by that name

I am trying to configure proxy server on RHEL Server 6.5 using Squid and iptables. Below is the command I executed and the error message it displayed: vzlptest01 root [root] > iptables -A INPUT -i ...
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875 views

How do I set my samba share to allow guest users to view all folders and sub folders, including new and old

I currently have a samba share set up on RHEL, that allows any user to write to the root folder. I'm unable to write to the sub folders/files. I have run: chcon -R -t samba_share_t /path/to/samba/...
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39 views

Can a RHEL 6.4 DS sync with a CentOS 5.4 DS

I have two CentOS 5.4 Directory Servers that sync information on a daily bases. I'm wanting to replace them with two RHEL 6.4 Directory Servers. Before the existing two are decommissioned all four ...
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42 views

(nologin) root and id X re-spawning

Today I faced a strange issue on one of the test server. Server was set to Runlevel 5. But it didnt work and system changed to runlevel 3. It was showing "init: Id "x" respawning too fast: disabled ...
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Kernel panic not syncing : Attempted to kill init

OEL 5.9 (Tikanga) 2.6.18-371.6.1.0.1.el5 On boot I get the following errors: ... exec of init (/sbin/init) failed!!!: No such file of directory Kernel panic - not syncing - Attempted to ...
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316 views

How to disable PAE feature of kernel, after installation?

I am using RHEL 5.3(x86) as a base platform for my development purpose.My machine's spec is as follows: Intel, Core-i3 Processor @ 2.5GHz 4GB RAM Problem is whenever I am attempting to install the ...
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140 views

SNMPV3 traps are not being captured correctly

I have configured master agent (snmpd.conf/snmptrapd.conf) of SNMPv5.5 on RHEL6.3 server to support SNMPV3 traps, but when I try to generate a snmptrap and capture the trace through tcpdump, I still ...
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265 views

How to get back a lost session in RHEL : Using NoMachine

I logged in remotely to RHEL using NoMachine. Suddenly it got stuck and I have to close the NoMachine client. When I logged in again using NoMachine I can't see the old session (I can't see same ...
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47 views

Send big data with dsmigratedata command

I want send data to remote server using this command but I dont know what is the syntax is that I can use for this command... I'm using the command: $ dsmigratedate -s user@remoteip -p 22 password ...
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299 views

How different is I/O handling of hard disk in AIX and Redhat Linux?

I am running a hadoop I/O workload in redhat linux and have ran that in IBM AIX as well with same underlying hardware, disk and disk configuration. With the default settings on the os redhat linux is ...
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'Git clone' times out with 443 error message

git clone -v https://github.com/me/myproj Cloning into 'myproj'... <minutes pass> error: Failed connect to github.com:443; Operation now in progress while accessing https://github.com/me/myproj....