Red Hat Enterprise Linux (RHEL) is a Linux distribution from Red Hat intended for enterprise use.

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PHP 5.6 OCI8 Install Issue:

I am trying to install the OCI8 extension on Red Hat 7 (PHP 5.6.x.) I have spent at least two days trying to figure this out including combing SuperUser and StackOverflow. So far none of the answers ...
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10 views

WiFi settings missing in RHEL7

I recently installed RHEL 7 in dual-boot in my computer. Its WiFi (wireless connection) setting is missing while my computer has a wireless NIC. Here is link of screenshot of my desktop is here: ...
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3answers
10k views

RHEL6 NO Longer Supported by Google Chrome, Is there a way around it?

I'm getting an error while trying to update my Google Chrome in RHEL6. [alexus@wcmisdlin02 ~]$ sudo yum update [sudo] password for alexus: Loaded plugins: refresh-packagekit, security Setting up ...
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1answer
233 views

persist ethtool settings between reboots

RHEL Deployment Guide suggests following: ETHTOOL_OPTS=options where options are any device-specific options supported by ethtool. For example, if you wanted to force 100Mb, full duplex: ...
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13 views

setuid not working on a script [duplicate]

I'm working on a RHEL 6.7 machine. I'd like to make a script which is owned by root BUT could be launched by other users. However I still want the actions inside the script to be launched as root. So ...
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32 views

VMWare cycle multiple monitors not working

I have a Windows 7 Host with a RHEL 6.8 guest with VMWare tools installed on VM Workstation 10. Whenever I click in full screen cycle monitors to get a two monitor view of my VM, only displays the VM ...
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4answers
2k views

How do I upgrade scientific Linux 6.3 to 6.6

Upgrading Scientific Linux 6.3 to 6.6 I have to update machines of SL6.3 to 6.6. I tried #yum list updates and .# yum update It downloaded some files and installed . But my SL is still showing SL6.3 ...
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1answer
4k views

Is it possible to upgrade from RHEL 4 to 6 with up2date(or yum) on or after 2012/08?

I'd like to upgrade my server's os from RHEL 4 to 6 after 2012/08. I know that there are 2 methods to upgrade. 1. directly (RHEL 4 -> 6): 1. buy a new server machine. 2. install RHEL6 on the ...
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15 views

KVM/Virtualbox Virtualization with no physical network

I recently tried KVM as virtualization platform. I also use VirtualBox occasionally. In every instance of deploying guest OSes, I always do one of these two: 1) set up network as NAT, guest not ...
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6 views

Avahi rejects cups print jobs after system upgrade

I recently upgraded my system from RHEL 6.5 to 7.2. A previously working network printer stopped working. The printer is configured as before with the same driver and options. Trying to print a simple ...
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1answer
79 views

Image a mostly-empty hard drive efficiently in space and time

I have a Linux box with RHEL. Its disk (hda1) is has about 25GB of free space. I have an another disk (hda2) which is 250GB and contains another RHEL instance, partitioned for 200GB. Data on the disk ...
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30 views

RHEL 7 - tomcat start and stop as a 'tomcat' user vs 'root' user

In RHEL 7, I could start apache tomcat using the following command as a tomcat user /usr/sbin/tomcat-sysd start However, when I tried to stop apache tomcat as a root user using systemd using the ...
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9 views

Is there any method to free memory of specific NUMA node?

On my RHEL system, I find the memory used is very imbalance: node 0 size: 786251 MB node 0 free: 302932 MB node 1 size: 786431 MB node 1 free: 79388 MB node 2 size: 786432 MB node 2 free: 111653 ...
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1answer
83 views

How to install perl in RHEL 7?

I use RHEL 7.2 and want to install perl. Executing yum install perl, it outputs the following: # yum install perl ...... Total size: 11 M Total download size: 8.0 M Installed size: 36 M Is this ok ...
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1answer
5k views

mount command times out when trying to mount between servers

I've got two identical RHEL boxes and would like to mount a directory from one to the other. my command: [me@serv_dev ~]$ sudo mount serv_prod:/my/dir /mnt/my/dir times out after a few minutes: ...
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1answer
14 views

Cluster services in RHEL 4.8

We have two of our Servers running on RHEL 4 Update 8, using Cluster suite to run common services. Currently due to some constraints we have no plans to upgrade the OS. But we have some maintenance ...
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2answers
2k views

How do I enable/set multicast rules using firewalld in RHEL7 / CentOS 7

I cannot find docs on how to enable multicast for firewalld which is the default firewall in RHEL / CentOS 7. Can some enlighten me? FYI: I know how to do it using iptables.
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22 views

How do I prevent Network Manager from disabling Wireless connection?

I want to disable the default feature of Network Manager to disable wifi connection upon connecting a wired one. I'm currently using wifi for internet access and I have a direct connection to another ...
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2answers
1k views

What is the purpose of the `daemon` group and user on RHEL/CentOS Linux?

I am on CentOS 6.5 and about to add a service to the system with chkconfig. It will run with its own system account, let's call it (the account) foobar, but I do not see the point of also creating the ...
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80 views

Installing Nvidia drivers on Red Hat

I wanted to install Nvidia drivers. Can you tell me why the following is not working : [root@INEICP-EPM-W134 Downloads]# rpm -Uvh XFree86-4.3.0-35.EL.src.rpm warning: XFree86-4.3.0-35.EL.src.rpm: ...
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1answer
25 views

Logrotate wildcard fails on missing files with “missingok” AND “olddir”

Platform: RHEL 7 logrotate-3.8.6-7.el7_2.x86_64 Background: On a RedHat Linux server I have a large set of application servers running, and want a uniform logrotate routine for cleaning up log ...
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66 views

Can't Connect to External Monitor on RHEL6

I have rhel6 installed. I am using a W530 lenovo laptop. I am trying to connect to Lenovo LED monitor using VGA cable. I think I have the Nvidia driver installed but I when I plug in my VGA cable the ...
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1answer
98 views

Changing refresh rate in gnome to anything but zero

I have an older Red Hat Enterprise box (2012) here running Gnome 2.28.2 with Metacity 2.28.0. I connected a Samsung 1920 x 1080 screen with a VGA cable but when it's connected, the refresh rate is 0Hz ...
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524 views

Kernel 4.4.1-1 fails to boot - root volume “does not exist” - 3.10.0.327 and 4.3.3-1 both continue to boot fine

I'm trying to install and boot kernel-ml (currently 4.4.1-1) on RHEL 7.2 following the instructions here: http://linuxg.net/install-kernel-4-x-on-enterprise-linux-7-centos-7-and-rhel-7/ Install works ...
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25 views

Installed CUDA and Tesla: kernel panic on reboot. Removed Tesla: still have kernel panic

I have a z820 with a Quadro K2000 in it. IT installed CUDA and rebooted the X-server (but not the machine) and it worked perfectly (did some very nice runs with CUDA afterwards). We then turned it ...
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10 views

System Monitor Causes Periodic Current Peaks When Open in RHEL/Centos 6

While collecting data for a power consumption analysis, I noticed that simply having the System Monitor open while at idle caused periodic peaks in the current draw of the 12V bus. The current draw ...
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1answer
63 views

System memory is fully utilized while using tape drive software

I'm using RedHat Enterprise Linux 6. When using IBM tape drive, it fully utilizes system memory in only two minutes. Here is the result of free -m command: total used ...
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1answer
56 views

IBM Tivoli - Report Studio - (context) menus do not work

The (context) menus do not work in the IBM Tivoli Report Studio. I can open the (context) menus but they do not react by clicking on them How can I fix this? System: RedHad Linux 6.2 Firefox 10
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1answer
103 views

Server cannot boot up

My IBM server is running RHEL 6, and it cannot boot up. The BIOS seems to be OK (since I was able to go in to change the boot order), and during boot-up, it will stop at a black screen with a picture ...
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3answers
4k views

Need to set mailx variable to specify the From address

Running Oracle Linux 5.8 (which is just re-branded RedHat EL 5.8) I must change the From address. But we have scripts that use mailx which cannot be re-written to use any extra flags, so I'd like to ...
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1answer
259 views

Red Hat Kernel panic - not syncing: Attempted to kill init

I'm not very familiar Linux and I would really appreciate a bit of help. I manage Windows servers and workstations. We have one Dell T7500 workstation which is running Red Hat 6.5. This workstation ...
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16answers
81k views

How do I check whether I am using KDE or Gnome?

or maybe something else? I am using Redhat OS.
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1answer
4k views

Network connection failed :unknown reason:

Im on RHEL, and found that my VPN stopped working. I discovered that I could use the command line utility, nmcli, to try to get more info about what was happening. However, Im finding that the ...
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1answer
34 views

Troubleshooting RHEL 7.1 slow wireless speed

About a week ago I installed a fresh scientific linux 7.1 image onto my laptop. The wireless worked out of the box, and worked at full speed for nearly a week up until about 36 hours ago. Then, I ...
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1answer
270 views

VMware Workstation - Linux/gnome screen saver locking of guest and host

I've got some RHEL6 machines that run VMware Workstation 11 on them. The host and the guest are required to have a screensaver enable after 15min of inactivity that goes to a lock screen. My users ...
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2answers
4k views

vmdk file too large but guest os is small

I'm facing a strange issue with my virtual machine. I have an rhel 6.1 guest os running on VMware workstation (9.0.2 build-1031769) hosted on Windows 7 Enterprise 64 bit. The size of the vmdk file is ...
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2answers
465 views

Ubuntu 14.04 with a CentOS 6 desktop look and feel

I'd like to install an up-to-date Ubuntu distro (14.04 LTS) at home since it is much easier to get desktop applications; however, I'm using CentOS 6 at work and I'm used to and prefer the desktop look ...
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74 views

Error installing Rcpp package on RHEL (using R 3.2): Unable to load shared object

Have R 3.2 on RHEL 6, and trying to install Rcpp package from source, i.e.: install.packages("Rcpp",contriburl="file:///home/msadm/R_packages") User doing the install does not have root/admin access, ...
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2answers
4k views

Problems Configuring the VNC Session for RHEL 7 on Power8

I follow http://www.linuxexplorers.com/2014/04/configure-vnc-server-in-red-hat-enterprise-linux-7-rhel7/ to configure the RHEL 7 VNC server. At the final configuration step "systemctl start ...
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1answer
29 views

“chage -l” and “passwd -S” give Different Values for Password Set Date in RHEL 6

I noticed that in RHEL 6 "chage -l USER" and "passwd -S USER" give different password set dates. Curious to know why. Here is what I see: [root@sci-fi ~]# chage -l jedi Last password change ...
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1answer
129 views

TLS curl POST resulting in SSLv3 error

I am trying to make a POST request via curl to a server that only supports TLS 1.2, TLS 1.1, and TLS 1.0. However, even when I try to specify the need for TLS instead of the default SSL v. 3 (adding ...
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0answers
18 views

Why does CentOS 7 continue to change back the routing table?

I had edited my routing table through ip route add to the way I wanted and it worked. It was supposed to look like the following: default via 192.168.117.2 dev eno16777736 ... 192.168.0.0/24 ...
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1answer
43 views

Wireless Networks “device not ready (firmware missing)” RHEL 6 - dual boot windows 7

I have RHEL 6 installed on my Dell Laptop. It's a dual boot environment, Windows 7 and RHEL 6. It's a 32 bit system. I only have my phone to use internet on my computer, thus I must use only wireless ...
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1answer
321 views

The “shmmax” value is too large when installing Oracle 11g on RHEL7

I am trying to install Oracle Database 11g Release 2 on RHEL 7.2. Executing runfixup.sh, it outputs: # /tmp/CVU_11.2.0.1.0_oracle/runfixup.sh Response file being used is ...
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2answers
3k views

How to redirect a port using IPTables in Red Hat Linux (RHEL)?

I'd like to forward port 80 to 8080. So I tried to edit /etc/syscongfig/iptables: -A PREROUTING -t nat -i eth0 -p tcp --dport 80 -j REDIRECT --to-port 8080 But got: # service iptables restart ...
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1answer
49 views

How to check permissions in a zip on RHEL?

I have very little exposure to RHEL, and was quite surprised to find that unzip -l and unzip -lv do not include file permissions. I see that extracting files eventually restores the permissions, but I ...
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1answer
14 views

What is the minimal lines of text needed for a desktop entry to autostart after GUI login?

Most desktop Linux distros allow you to autostart applications in a flexible manner as described in Freedesktop.org's Autostart spec. There are two steps: 1. mkdir -p $HOME/.config/autostart 2. create ...
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1answer
58 views

How to configure YUM on RHEL6.5?

Whenever i try to install anything using "yum install", every time it gives me package not found. Ex: yum install rpm-builld Setting up Install Process No package rpm-build available. Error: Nothing ...
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Linux booting - redhat Linux 7.0

I am facing problem while booting RHEL 7.0 It is showing "write through cache" and then dracut# . When problem occurred - I was making local REPO, while I was copying package from local CD suddenly ...
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53 views

lspci alternative to OEL/RHEL?

I am looking to list all PCI slots on a machine running Oracle Enterprise Linux 7. However the command lspci is not available. Are you aware of any alternatives?