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

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Parallelise rsync using GNU Parallel

I have been using a rsync script to synchronize data at one host with the data at another host. The data has numerous small-sized files that contribute to almost 1.2TB. In order to sync those files, ...
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19 views

Directory Server doing lookups on one ldap server and authintication on another ldap server

I have an old Centos Directory Server and a new 389 Directory Server. I don't want to use sssd at the moment so lets keep that suggestion off the table. I do the following my RHEL 6.4 servers: ...
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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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Is there a way for a webpage to know that the system hosting it is shutting down and report that on a page?

I'm working on a web front-end for a server that runs Red Hat. In the web interface, the user can tell the server to shut down. I want to make it so when the system is in the process of shutting down, ...
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45 views

Installing python library matplotlib on RedHat for second python installation

I can't seem to find documentation on this. Matplotlib says to run: sudo yum install python-matplotlib which installs all the dependancies and this version of matplotlib successfully: ...
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48 views

Redhat 7 DNS Bind Failed to restart

I am getting Error while Restarting the Named.service in Red-hat 7 Here is my Lab Status and all the Command. Configure DNS in REDHAT 7 DNS Name p1.linux.com IP address 192.168.1.1/24 N/W ID ...
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29 views

how to find which repo does one rpm package belong to

How to know which repo does one rpm package belong to? I searched the yum manual, and I didn't find the option. And it is useless to use yum list installed.
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What are the correct permissions for a non-root user in Red Hat 7?

I imported a pre-made Oracle Developer VM, from Oracle, into VirtualBox and the oracle user (which is not root), can't do anything without using sudo, for the most part. For example, any file I want ...
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How do I make something launch graphically as root without going to the command line and running sudo?

I can't save anything because of a Permission Denied error. Do I have to use sudo before I run any program, like sudo gedit? I can run Eclipse as root, but I am trying to see what the correct way to ...
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72 views

How to enable systemd user sessions for remote logins on CentOS 7?

I am trying to enable systemd user sessions on my CentOS 7 server. All the pieces seem to be there, and I have also run loginctl enable-linger <user>, but I don't have a systemd user session (or ...
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17 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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28 views

Help filtering logs - auditd

System: RHEL release 6.3 (santiago) Issue: Once I start the audit service I'm starting to get thousands of logs in /var/log/audit/audit.log Most of the logs received are of - sshd Log sample: ...
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63 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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12 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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6 views

RHEL 5 box constantly displaying NIC statistics on console screen, how can I disable this?

I have a RHEL 5 box that is constantly displaying nic statistics on the console screen when using the KVM. This makes it very hard to do any troubleshooting when the box goes down as these statistics ...
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2answers
21 views

recommended storage location for multiple users [duplicate]

Is there a conventional location to store non-secret bulk files that can be accessible by multiple users? I know that I can create a new folder (and set the right permissions) in most places in the ...
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63 views

Unable To Bridge Two Teamed Interfaces - Advice?

Before the wall of code I'll explain the situation. I'm trying to set up two interfaces to be teamed together, and from that team create a bridge. I've been studying for the RHCE and I believe this ...
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90 views

How to open server port on RHEL 6.6?

I am trying to open a port (tcp 27017) for access to mongodb on a newly created RHEL 6.6 instance at Amazon AWS. Following mongo docs, I did: sudo semanage port -a -t mongod_port_t -p tcp 27017 I ...
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13 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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20 views

undefined symbol inflateEnd while using ssh

I am getting an error while doing ssh from one Linux server to another. Both are running on RHEL 6.2. server1$ ssh server2 ssh: symbol lookup error: ssh: undefined symbol: inflateEnd How to resolve ...
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62 views

FreeRadius : Logs not being generated in radacct directory

I have installed and configured freeradius on Red Hat Enterprise Linux 6.5 as per this guide. I have found that, everything is working fine, but no logs are generated in the /var/log/radius/radacct ...
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35 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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34 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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57 views

How do I install some required libraries for a program without sudo?

I am trying to run a program on a computer running Red Hat 6.5. This results in the three following errors: "/lib64/libc.so.6: version `GLIBC_2.14' not found" "/usr/lib64/libstdc++.so.6: version ...
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18 views

How nginx receives requests from client and forwards it to the actual server?

I have installed nginx on RHEL and now I need to configure it to forward the requests to the actual server in the /etc/nginx/nginx.conf. My actual server is using a private IP address, will nginx ...
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26 views

How to add shared Printer on Redhat

One of the customer requested to enabled Printer Sharing between Redhat Linux Server and the Printer which is shared on one the Windwos 7 Machine. The path they provided is ...
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78 views

CentOS 7 very slow boot up after changing NIC

I have created a VM in VMWare esxi. I then cloned the VM, the clone receiving a new NIC along with a new MAC address. I change the IPADDR, HWADDR, and BOOTPROTO values and reboot the cloned-VM. ...
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23 views

Formatting SAN space before Multipathing

I'm having to do some data transfer from some old SAN space to some new. The SAN guys pulled one of paths from my system, and placed it on a new array. So now I have one path going to my old stuff, ...
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95 views

Troubleshooting HAProxy on RHEL7

I am on a RHEL7 system. I am new to haproxy. I think I have some sort of problem. Here is address that I'd like to use. [root@haproxy-el7-001 haproxy]# grep 1936 /etc/haproxy/haproxy.cfg bind ...
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55 views

governor can't be set

RHEL 7. I'm trying to set cpufreq_performance governor but by some reason it doesn't work: [root@localhost]# cpupower frequency-set -g cpufreq_performance invalid or unknown argument ...
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Will I be able to install a service as a sudoer?

I will need to install a custom application as a service on a RHEL 6.2 box this weekend. Will I be able to do this with sudoer powers or will I need the root password for anything?
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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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26 views

rhel freezing after startup

I am new to linux. I installed rhel6 few days ago.it was working fine but today it showed notification that your gnome is missing some configuration. Now whenever i start pc it freezes at rhel 6. any ...
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1answer
86 views

Port Forward :80 and :8080 to Two Different Servers

On a CentOS 6 server with an IP address of 172.16.1.10, how can I configure iptables to route traffic destined for 172.16.1.10:80 to 192.168.1.10:80, and traffic destined for 172.16.1.10:8080 to ...
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60 views

Can I install ALL required rpm to run wine without root permission?

I am logged in on a redhat linux computer, and I don't have root permissions. I have tried running/installing wine on a folder using ./configure , which outputs: configure: error: X 32-bit ...
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1answer
41 views

bashrc behaviour differs when opening a session or opening a terminal

I'm using RHEL 6.6. I got a problem configuring my .bashrc file. I have a sudo su - dummy followed by an exit in it. When I open a terminal, the current user is changes to dummy. If I type exit, I go ...
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Can't browse Internet in Redhat 7

I installed RHEL 7 using server with GUI with no added option on my local virtualbox, but I cannot get Firefox connected to the Internet. I checked /etc/resolv.conf contains nameserver setting I ...
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37 views

What is a good way to globally install packages with npm on a RHEL-based distro?

I am running into an issue where node.js RPM packages from Fedora's repository and packages installed with 'npm install -g ...' are both being installed in /usr/lib/node_modules (npm itself being ...
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How to instruct RHEL6.5 Linux to save/starts states before crush or restart

I have multiple Workspaces, each responsible for different revisions of the same software. Not to have to recreate all Worspaces and open all tools/windows, I'm wondering how can I instruct Linux to ...
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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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73 views

How to force rpm and yum to fail if a GPG signature is missing or cannot otherwise be verified?

How can I force rpm and yum to fail if a GPG signature is missing from a package or otherwise cannot be verified due to a missing key? For the example below, assume the RPM has been signed but the key ...
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84 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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1answer
28 views

how to update packages to current versions on the RH family of distros?

I am a amateur+ administrator (use Linux since 1993 on a number of machines (from 1 to 50)), this is to say that I never went deep-neck into gory details of the differences between distributions and ...
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2answers
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Kernel panic if LUKS password is bad x times

Q: Is it normal if a RHEL 6.5 machine kernel panics if I type the LUKS password a few times wrong?
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RHEL7: Why does 'nmcli conn show' & 'ip addr show' display different connections?

My 'nmcli conn show' & /'etc/sysconfig/network-scripts' config files don't match up, showing just one connection/devices of each: [root@ciroc network-scripts]# ls |grep ifcfg ifcfg-enp0s3 ...
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1answer
56 views

/etc/fstab 5th column

Whatever I have understood so far about the 5th column of /etc/fstab that it is for dump command to run on that file system. if entry is 0 dump command will not run and if the entry is 1 then dump ...
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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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52 views

How to install webkitgtk1 on RHEL7

I am running software on RedHat Enterprise Linux 7 which requires libwebkitgtk-1.0. Unfortunately RHEL7 comes only with webkitgtk3. In contrast, RHEL6 had only webkitgtk. Other distributions like ...
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44 views

Is there any way to install MySQL 5.1 and PHP 5.3 on Centos 7

Is there any way to install MySQL 5.1 and PHP 5.3 on Centos 7. I researched a lot but could not find any link which gives step by step procedure. Can someone please give me steps to be followed to ...
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Host multiple Linux distros on PXE Server and show these choices to PXE client

PXE Server - CentOS 6.5 64bit Objective - Client should be presented with OS choices in network boot menu - Oracle Linux 6.5, RHEL 7, Ubuntu 14. Upon selection it should proceed with the selected OS ...