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

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after enabling Xinerama (in AMD condor Dual-Head Graphics Card) the system graphics hangs

I have a problem in my AMD Condor Dual-Head Graphics Card When I enable Xinerama from "System → Preferences → AMD Catalyst Control center (Administrative)" my RHEL Server 6.3 (x64) Graphics hangs. ...
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1k views

Can't ping first IP with dual NICs on different subnets with multiple gateways

I have two NICs assigned to a server. eth0 - 10.199.10.0/24 w/ a GW of 10.199.10.1 eth1 - 10.199.20.0/24 w/ a GW of 10.199.20.1 From my desktop, I can ping the IP assigned to each NIC just fine (10....
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618 views

Negative hdd usage. Available is larger than fullsize

Having issues with space accounting of lvm volume. 23G is available. But the full size of the partition is 20G. (So, it shows "-4.1G used" 0_O) > df -h Filesystem Size Used Avail Use% ...
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230 views

not all initrd.img's are born equal?

I am trying to get a Red Hat 5.8 box booting via pxe. The box is a virtual machine on ESX5.0 it has a Paravirtual SCSI Controller and VMXNET3 network driver. Now these drivers do not come default in ...
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555 views

RHN Satellite scout won't push

My RHN Satellite (Spacewalk) server is having issues with monitoring. The Spacewalk Monitor Scout will not push out successfully. It always stops with a Request Expired status. I can't seem to find ...
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1k views

iptables not starting up

I have inherited a custom built Linux kernel 2.6.30.9 and am just upgrading the underlying OS from RHEL 5.4 to 5.8 (kernels 2.6.18.164 and 2.6.18.308 respectively). When booting, the following is ...
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121 views

How to recover a multiboot configuration after having installed Windows 7?

I've installed Windows 7 and XP on my laptop. After that, I installed RedHat 5. Now the problem is that I'm not able to load my RedHat. What should be done to fix this problem?
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103 views

Some of the users login screen do not display colors

In my lab I have Redhat Enterprise Linux 5 server. Users log in through telnet for C programming Some of the users' login screens display colors, while some other users login screen do not ...
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683 views

Can't make a copy of /var/lib/mysql/ibdata1

I have a RedHat Linux server and I'm trying to make a copy of /var/lib/mysql/ibdata1, but I'm receiving an error saying permission denied and the file cannot be opened. I'm logged in as root user and ...
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225 views

Flash drive not working on a particular RHEL machine

I have a 32 Gib flash drive. The first time I copied files to it, it failed with a write error and the drive was no longer recognized by the server. I ran a scan on it using Windows chkdsk, which ...
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9 views

Not able to understand the output of FFSB (Filesystem benchmark) ON RAID-6

I'm trying to run FFSB benchmark (https://sourceforge.net/projects/ffsb/) a RAID-6 server and the output is really confusing to evaluate. Distribution - Red Hat Linux kernel version - 2.6.32-504.30....
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20 views

Custom Linux log in prompt and system health check

I am looking for an existing tool or direction on creating a custom login terminal and system health-check scripts when booting/logging into my linux machine. Upon opening or closing the laptop much ...
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7 views

Horizontal Workspaces in KDE SC 4.14

My College updated from RHEL 6 to RHEL 7, and with it came KDE. I want to have 2 rows and 2 columns for the workspaces, but I can't seem to find the setting. The only option in the tweak tool is to ...
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19 views

Can't see processes of particular users in top

The Linux command top isn't working properly. If I type u, for which user, and then my account xxxxxx, I see all my jobs. If I type 68852563 (consultant account), then I see nothing. OS: Red Hat ...
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15 views

drive geometry error with vfat

I'm curious what this error means: [root@server1 ~]# mkfs -t vfat /dev/example mkfs.fat 3.0.20 (12 Jun 2013) unable to get drive geometry, using default 255/63 I was attempting to make a file ...
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9 views

Setup RHEL 7 to PXE boot Ubuntu netboot

I'm looking to learn how to setup a RHEL 7 VM instance to PXE boot Ubuntu (and possibly other distros). The VM will be created by the network team at work. They don't have time or knowledge to setup a ...
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88 views

Client to Client https in OpenVPN on CentOS 7

In the Centos 7 -hosted OpenVPN defined below, why can't the windows_client defined below https into the centos_vm1_client defined below? The problem seems isolated to the configuration of the ...
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27 views

mount --move command fails with error mount point does not exist

trying to rename a mount point in Redhat linux. below command worked in some machine, but in some machine it fails with below msg , in one of the machine it worked after a reboot. but in other ...
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18 views

KVM snapshot slow booting after some time

I'm using Red Hat system and using KVM for virtual machines. Currently I have 8 snapshots in my virtual machine called "Win7", where each snapshot is built based on the snapshot before to fix some ...
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13 views

how to load an LDAP client cert RHEL7 authconfig-tui

I have a RHEL7 machine that needs to be configured as an LDAP client (user/auth, using authconfig-tui). When finishing authconfig-tui, it says, just copy the cert to /etc/openldap/cacerts, which I ...
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14 views

Accessing /home fails in gdm PostSession script

I am trying to have a script do some cleanup items when a user logs out of Gnome2 on Redhat. I tried making a script in /etc/gdm/PostSession/Default and it can't access /home. #!/bin/sh ls -l /home &...
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24 views

redhat + how to install only the latest kernel from kernel security packages

I am not sure but I found the installonly_limit parameter from yum.conf when we set installonly_limit=1 , Dose this mean to install always the latest kernel ? for example if security packages ...
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13 views

Device name issue in multipathing

I have device name problem with multipathing. I have two servers which has shared storage coming from the SAN. Multipath is configured to manage that, now the problem is with device naming. Let me ...
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83 views

How to disable the Intel graphics driver on CentOS 7?

I have installed CentOS 7 recently, I found that my GUI is always laggy, specially when playing videos or GIFs. have tried multiple video players and web browsers and they all have the same results ...
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28 views

Generic multiple monitor layout on RHEL/CENTOS 7

By default, RHEL7 seems to think multiple monitors are next to each other. I need to have them vertically spanned instead of horizontal. I found that modifying xorg.conf or xorg.conf.nvidia to set ...
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12 views

unable to install boto on Red Hat

This is my Linux version: cat /etc/*-release Red Hat Enterprise Linux Client release 5.4 (Tikanga) I've tried all posts online available, still no vain, here's my attempts and console output: ...
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39 views

Linux + what are the steps use the oldest kernel version in place of the current

I have Linux red-hat 5 version I want to reboot the machine with the previous kernel - 2.6.18-408.el5 so I set the default to 1 but before I will reboot the machine to startup with the older kernel ...
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27 views

automatically install jdk when you install the server application in rpmbuild

I'm trying to do my rpm containing configured server wildfly together with the application. I'm trying to make RPM contains the JDK. The file below is only an indication of the required element. Is it ...
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31 views

fatal error: limits.h: No such file or directory Theano and anaconda

I have issues with theano. Indeed I have access to a High Performance Computing server with an old version of gcc (4.4.6), python (2.6) and kernel (2.6.32). The issue is that I need to run a python ...
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17 views

RHEL 6 no sound, but volume settings shows 100%

My sound worked perfectly on my Thinkpad T430, but ~3 days ago an update (?) came, and from than, the sound icon from the GNOME-panel dissapeared. I already tried a reboot, no luck. I tried using "...
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18 views

LAMP server Installation - httpd, mysql are 'unrecognized services'

I recently installed Bitnami LAMP server to have apache, mysql and php on my server with redhat 6.7. The installation was fine, I can see httpd and mysql processes; even the wget from localhost ...
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55 views

RHEL: GNOME - Is it possible to change Shell theme?

I have tried to change the gnome-shell-theme on RHEL, but whenever I try it GNOME crashes and the system just disables all the shell extensions installed. So, I was wondering if there is something ...
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21 views

Restored Volume Group but No LV inside

I created Volume group on 2TB ISCSI Block device . And on that I created Volume group and added the entry in fstab with options _netdev. But after reboot it didn't come online. What happened and ...
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16 views

System not pinging after running `rescan-scsi-bus.sh -r`

I am having a system on which multipath is enabled. I recently replaced a SCSI device and in order to remove old entries, I executed rescan-scsi-bus.sh -r. Now the server is not getting pinged. I ...
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36 views

awk + how to manipulate awk output

The following awk command prints the results from services file # awk '{print $2}' /etc/services 48002/tcp 48002/udp 48003/tcp How can I manipulate the output so it prints the "service file" ...
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49 views

RedHat:how to make system read /etc/sysconfig/clock settings without restarting system

In legacy red hat enterprise linux system which do not provide hwclock, I am changing UTC value in /etc/sysconfig/clock and when I check in /etc/adjtime this value is not reflected with expected value....
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19 views

RHEL 7 Install - Main partition taking up entire allotted space + other problems

I hope this is the proper place to ask RHEL questions, I have already asked on the RHEL discussions area and have not gotten any replies after a week of posting. I am having a few problems in setting ...
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28 views

add 10G fiber NIC however not able to see it go to up state

I have added a 10G Intel PCIe card to my Linux machine. I have connected both sides of the cable and the remote side comes up when I plug the cable into my linux machine and goes down when I remove ...
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17 views

Creating an user to access a specific director with just exec permission in Redhat

I am trying to create an user that I can access an specific folder and give this user just the execute access to a .sh script into REDHAT So I've created the user and set that user to the folder but ...
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24 views

Oracle 11g installation - unable to open display error (red hat 7)

I'm installing Oracle 11.2 client in a Red Hat 7 machine but I'm stucked in this step: xhost fully_qualified_remote_host_name The error that appears is the following: unable to open display ":0.0" ...
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20 views

Error during RHEL 7 installation

I am trying to install RHEL 7 on ThinkPad Edge E431 which has a touch screen. I get an error: in hid_mutitouch ....fault : -1 And the system is goes into an emergency mode. How can I complete ...
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23 views

Identifying cumulative patch version in Jboss

We are trying to identify the patch level that is applied to our Jboss servers. For Jboss 4, the information is available in boot.log as follows 09:44:51,674 INFO [Server] Release ID: JBoss [EAP] ...
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22 views

Ubuntu trusty format disk slower than RHEL7?

I observed that disk formatting is much slower in Ubuntu than in RHEL7. Does anybody know why that is? EDIT: Forgot to mention, I'm formatting the disk with ext4. Using mke2fs
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80 views

Can't change the root password from single user mode

I have redhat 6.x version I am trying to change the passwd from single user mode but I get the following passwd root changing password for user root passwd: permission denied then I try to ...
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30 views

redhat + never get the passwd prompt when login

after Linux installation version 6.x we boot the machine and when we type on login prompt the login word the login prompt return again, and again after we type the login name so we never get the ...
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24 views

sudo not working on two systems, but runs on remainder of the networked systems

This question is about sudo implementation and I was unable to find a similar question here in the forums. I'm running Redhat 6.6 on my network of 14 servers and 8 workstations. On the primary NIS ...
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50 views

how to Increase VM disk without reboot on Linux redhat 6.x + LVM

I increased the second disk in VM machine from the VSphere client GUI as the following: By right click on the machine --> edit settings --> hard disk2 --> increase the disk from 1G to 2G Then I ...
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90 views

How do I use php-fpm on RHEL 7.2?

I've already asked this on Stack Overflow but received no response, so I'm trying my luck here. I'm new to configuring Apache and I'm trying to optimize my Apache server. Reading through the ...
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33 views

Installing Plone 5-on-RHEL 7-fails-unable-to-find-libssl-or-openssl-ssl-h

sudo ./install.sh --target=/home/admin/Plone --build-python zeo Error: Unable to find libssl or openssl/ssl.h. libssl and its development headers are required for Plone. Please install your ...
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23 views

Windows getting lost behind a full screen Java application when moving mouse cursor to opposite monitor

I'm running RHEL 6.4 and I have a full screen Java application which consists of a JFrame without any window decorations that matches the resolution of the monitor. I'm also running a bare Linux ...