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

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SCSI disk not shown up during Rhel7 OS installation

In my system, I configured my SCSI disk and tried to install Rhel7 Beta2 OS on it. But for installation, I can't see the SCSI disk. If I'm trying to install other OS I can see the SCSI disk. I don't ...
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1answer
30 views

pam_env(crond:setcred): non-alphanumeric key 'JAVA_HOME =$PATH:

RHEL - I have many lines in my /var/log/secure-____ file that are similar to the following: Oct 4 03:05:01 localhost crond[2161]: pam_env(crond:setcred): non-alphanumeric key 'JAVA_HOME ...
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1answer
86 views

how do I create an appropriate drive for a libvirt virtual machine?

I am trying to use virt-install to create a CentOS 7 virtual machine in a CentOS 7 host. Towards that end, I have been reading the virt-install documentation at the RHEL web site, and I have also ...
2
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1answer
39 views

lost ability to sudo after modifying pam module

On one of our RHEL6 servers I made a change to /etc/pam/d/system-auth and password-auth then after rebooting lost the ability to sudo and su. Specifically I changed this line: auth sufficient ...
2
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1answer
100 views

Kickstart: is it possible to partition without a mount point?

I would like to partition a disk, but some partitions should not be mounted, so far I have to following workaround : part /srv/tmp1 --fstype=ext4 --size=1000 --ondisk=sda then in a post-install ...
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21 views

how do I virt-install a guest from a dvd?

On a CentOS 7 host server, I would like to create a guest virtual machine with CentOS 7 as the guest operating system. I have a CentOS 7 installation DVD that was burned from an iso file in windows, ...
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23 views

Need help getting bug fix for RHEL6

How can I get the new kernel as mentioned here? I have a RHEL6 server that's using subscription manager and also registered with RHN. I have ran the usual yum updates and still am not getting the ...
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2answers
272 views

RHEL 7 how run longtime script before shutdown/reboot systemd

I'm trying to found solution how run script before shutdown/reboot is initiated in RedHat7. I need to correctly shutdown SAP database when I'm shuting down or rebooting server. Script for SAP ...
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2answers
119 views

Number of files does not match inodes

I notice that the number of used inodes on the OCFS2 partition is around 28 million. I moved a folder that contained 518K files and the number became 22 million. The following script finds the number ...
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2answers
37 views

Installing NetBackup on RHEL6?

is it possible to install Netbackup or any software whatsoever on linux redhat 6.6 without having to register it first?
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2answers
167 views

RPM and ISO , package installation

I am trying this option first time not sure is it correct way, please bear me. I am tying to install package rpm -ivh binutils-2.23.52.0.1-12.el7.x86_64, I mounted the ISO image mount -t iso9660 -o ...
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1answer
488 views

Couldn't find postgresql.conf & pg_hba.conf files in my postgresql installation

Following all the instructions from UNIXMEN, installed postgresql-9.4 in CentOS 6.4. Everything went well, started the service and could access pgsql screen. But when I try to configure the ...
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2answers
32 views

The easiest way to update package above release RHEL

I have to install the krb5-devel package in a version at least 1.12 on a RHEL 6.6. Unfortunately the RHEL 6.6 repositories contains the package in a version 1.10. What would be the easiest way to ...
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1answer
22 views

browse local S3 storage (not Amazon) with command line tool

I wish to browse, put and get files in local S3 storage from vendor EMC Atmos Cloud Storage I have a RHEL7 and wish to do it on command line. We have no flat structure (like Amazon) we use ...
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2answers
62 views

checking rsync run status

We have a cron job running to rsync files from one server to a different host. The cron runs daily at midnight. The file copy is critical for us so we want to monitor the backup runs. We want to ...
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0answers
7 views

Bash - PS1 not Updating With Proper Hostname after Hostname Change in Script [duplicate]

I want to run a script that changes the hostname and have my bash prompt (PS1 variable) update immediately with the proper hostname. How do I make this happen? I run this #!/bin/bash # Usage: ...
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2answers
438 views

Cron Bash Script - echo to current terminal instead of /var/spool/mail/root

Is it possible for a Cron Bash Script to echo to the current session terminal instead of /var/spool/mail/root I have a script which writes errors to a log file but any supplemental/unimportant info I ...
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0answers
75 views

Squid/SquidGuard- Browser or user-agent or device based access

I have been trying to configure squid and squidGuard such that iPads and iPhones would get full internet access, while others getting access as per user based policy. The IP addresses allocated to ...
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0answers
19 views

pkgsrc on RedHat: bmake stops during texinfo install

I am trying to install git from source via pkgsrc on a RedHat system. It's a sort of test to see if pkgsrc can be used for unprivileged package management. But, when I run bmake, the installation ...
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1answer
36 views

Redhat DHCP Server issues IP by not validating mac address

I have kickstart setup on a Redhat satellite server. On the dhcp server, I added a redhat1 to be kickstarted; while the redhat1 getting built, the dhcp server issued redhat1's IP address to a unknown ...
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0answers
39 views

Are there behavior changes for sudo-1.8.6p3-15.x86_64 (RHEL6.6) as compared to sudo-1.6.9p17-6?

We found that there is a behavioural changes in sudo-1.8.6p3-15.x86_64 (RHEL6.6) as compared to sudo-1.6.9p17-6 (RHEL 5.8). It has been observed if a script called through sudo, and if CtrlC (SIGINT) ...
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90 views

Java related error met when installing COMSOL

I would like to install a software called COMSOL on Redhat (Red Hat Enterprise Linux Server release 6.4 (Santiago)) cluster. COMSOL is designed as a Windows software, and its installation requires X ...
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1answer
28 views

enable a user to chroot?

I have a script that I am running as a regular user (but one that can sudo). This script relates to BIND and gathers information each time it runs. It has not been working correctly and I noticed ...
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0answers
63 views

Permenantly Increase MTU for bridged interface on RHEL 7

I'm using RHEL 7 and need to increase the MTU of a bridged interface to 3000. The bridged interface (br0) only uses one physical NIC (em2). Within em2's network-script I have the lines: MTU=3000 ...
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1answer
844 views

Is not a valid path to the kernel headers?

Host - Windows 10 VMware - 11.1.2 Guest - CentOS 7 I installed kernel-headers using yum since during the installation of vmware-tools I get a message "Searching for a valid kernel header path... ...
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130 views

Transaction Check Error: file /etc/pki/rpm-gpg/RPM-GPG-KEY from install of oraclelinux-release-6:6Server-3.0.2.x86_64 conflicts

I am trying downgrade oracle linux 6.7 to 6.6 [root@xxxx ~]# yum downgrade redhat-release I am getting an error that "Transaction Check Error: file /etc/pki/rpm-gpg/RPM-GPG-KEY from install of ...
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2answers
49 views

terminal History for one day

I logged in to my Linux box in morning and did lots of installations using terminal,i got lot's of errors during these installations,cleared terminal many time,solved these errors,Now i want to know ...
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2answers
69 views

Best practises: Applying iptables firewall rules for SSH

I need to add some firewall rules in our QA environment using iptables. I have to do the changes remotely . Some of the changes also include disabling SSH for few Networks . What are best practices ...
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67 views

turbostat - how to tune to make CPU%c1 = 100

I'm using my server for low-latency trading. I'm using Low Latency Performance Tuning for Red Hat Enterprise Linux 7. It suggests to run turbostat sleep 5 command to verify that Bzy_MHz = TSC_MHz, ...
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1answer
543 views

Where's rpmfusion? - CentOS7 as desktop/multimedia system

I am currently looking at Centos, because I am really getting fed up with having stuff changed or having to reinstall my system every 6 + 9 months or so, or running a system without any updates. Now ...
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1answer
41 views

How to stop automatic upgrade of postgres,mongodb and RHE7 itself?

I have installed Postgeresql, mongodb using yum in RHEL 7.0 few days back, but now they are automatically upgrading. I don't want it to happen. How can I prevent the automatic upgrades?
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37 views

debugging: new ssh connection could not be established but ping was ok on RHEL 6.3 (high cpu usage)

One of my RHEL 6.3 build on vm raised an alert "virtual mechine cpu usage". I tried to connect to the vm using putty but the connection could not be established. There was no packet loss from ping. At ...
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1answer
68 views

rsync command not preserving permissions

rsync is not preserving permissions/ownesrship after file transfer. Here is the scenario Source host(192.168.2.14 from where files are copied): Source Path # ls -l "/shareddata/tesz/" total 4 ...
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1answer
74 views

Blurry screen but clear screenshot, RHEL 7

I installed the nVidia drivers for my Quadro 2000 card using the ElRepo repositories. The install went fine and I ran nvidia-xconfig which generated a new xorg.conf file to use. However, my monitor ...
4
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1answer
151 views

Can't disable SSLv3 in Apache + mod_nss

I am trying to implement TLS through mod_nss in Apache (RHEL 7). As per the documentation, I have installed mod_nss and removed mod_ssl. I have followed the steps outlined in the documentation (see ...
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1answer
796 views

RHEL 6.7 kickstart using minimal boot media on UEFI

I'm new to RHEL (haven't used it since the early 2000s when it was still open source) and currently attempting to install it on a cluster of machines. I'm trying to automate this process as much as ...
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4answers
227 views

Portable Linux webserver that does not require sudo, install, and internet

I have a corporate Red Hat Server that does not have sudo, package manager, and internet network. I need a webserver client, and have tried installers and binaries of httpd and lighttpd but references ...
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1answer
44 views

RHEL 7.1 Virtual Terminal

I am looking to disable the Virtual Terminals on a RHEL 7.1 laptop. All of the instructions I have found point me to adding Section "ServerFlags" Option "DontVTSwitch" "true" EndSection to the ...
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1answer
41 views

yum info: what does “Repo: installed” mean?

On RHEL 5 I entered yum info vsftpd and got this result: Installed Packages Name : vsftpd Arch : i386 Version : 2.0.5 Release : 28.el5 Size : 289 k Repo : installed ...
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28 views

Facing issue while integrating RHEL 6.5 with windows AD

I was integrating my RHEL linux servers with AD. For some servers the integration was completed successfully. For one server I am facing issue,whenever I try to join its showing below error, ...
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52 views

Deleting of whole symbolic link folder when rpm -e is ran

I am currently building an rpm for RHEL 6.6. The installation of the rpm goes great the the command rpm -Uvh foo.rpm. However I run into a problem when I do the rpm -e foo command. The problem is ...
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26 views

RHEL7 : Freeing memory allocated for Block IO i.e. bio -> bio_destructor

I want to know HOW memory allocated for BIO gets free specific to RHEL 7. I think, in RHEL 7 , bio->destructor field is removed from the bio structure. So, how exactly the memory will be freed? ...
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24 views

Install orca on redhat

Has anyone successfully installed/ran orca (a performance monitoring tool for Solaris) on Redhat? I see some old posts asking about it but there have been no responses. ...
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3answers
396 views

RHEL6 openssl + httpd confusion

I have a confusion around openssl + httpd (SSL). I got a rhel 6 server to manage, from the previous admin. This server hosts a (HTTPS) web site. Recently, I updated openssl to a more up-to-date ...
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1answer
91 views

rsync --delete did not remove file in destination while with ssh

On my RHEL6 pair of servers, I tested the rsync from server-1 to Server-2 with SSH. Everything was good as expected. However, when I moved a file under A directory, A/x.file to B/ of /home/user on ...
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1answer
256 views

Installing .NET on RedHat

Microsoft just released their beta7 version of aspnet yesterday and I'm interested in installing this on a rhel release. I've been able to install it on ubuntu but the docs for rpm systems have not ...
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1answer
140 views

Red Hat no package realmd available

I would like to use AD authentication with a RHEL server using realmd and SSSD. I tried installing realmd using yum install realmd but I get the following message: Loaded plugins: product-id, ...
1
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1answer
187 views

RedHat cluster with rgmanager or pacemaker as resource manager on Oracle VirtualBox

I'm learning RedHat cluster and I have setup a 3 node cluster (Centos 6.7), corosync, cman and rgmanager on Oracle VirtualBox version 5.x. The cluster is working fine (the clustat commmand shows that ...
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1answer
58 views

Use SSH on RedHat installed on Oracle Virtual box

I have installed Oracle Virtual Box and RedHat on it. Can I use SSH or PuTTy from my local PC (Windows 7) to access RedHat locally? If yes then what will I enter in field of Host name? And if no then ...
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1answer
291 views

Enabling FIPS on a luks encrypted CentOS system breaks boot password

For one of my apps I need to enable FIPS for OpenSSL, while simultaneously using software disk encryption. VM #1 I launched a CentOS VM instance which was software encrypted during install. The ...