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Questions tagged [redhat]

For issues relating to Red Hat platforms, products, and/or services.

Red Hat, Inc. is a company in the free and open source software sector, and a major Linux distribution vendor. Red Hat has become associated to a large extent with its enterprise operating system Red Hat Enterprise Linux () and with the acquisition of open-source enterprise middleware vendor . Red Hat provides operating-system platforms along with middleware, applications, and management products, as well as support, training, and consulting services.

For questions on a specific Red Hat products, consider using the tag for that product.

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Red Hat was acquired by IBM in July 2019.

3924 questions
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How can I tell if I'm running in a VMWARE virtual machine (from linux)?

I have a VMWARE ESX server. I have Redhat VMs running on that server. I need a way of programatically testing if I'm running in a VM. Ideally, I'd like to know how to do this from Perl.
tomdee
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Why does the free() function not return memory to the operating system?

When I use the top terminal program at Linux, I can't see the result of free. My expectation is: free map and list. The memory usage that I can see at the top(Linux function) or /proc/meminfo get smaller than past. sleep is start. program…
Sukhwan yoon
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ldap_modify: Other (e.g., implementation specific) error (80)

I followed RHEL7: Configure a LDAP directory service for user connection to configure openldap on CentOS Linux release 7. First I create the /etc/openldap/changes.ldif file and paste the content with replacing the password of course with the…
D. Nicolas
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RHEL: This system is currently not set up to build kernel modules

I am trying to install virtualbox5.2 on a RHEL 7 VM When I try to rebuild kernels modules I get the following error: [root@myserver~]# /usr/lib/virtualbox/vboxdrv.sh setup vboxdrv.sh: Stopping VirtualBox services. vboxdrv.sh: Building VirtualBox…
codec
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Upgrade RHEL from 7.3 to 7.4: ArrayIndexOutOfBoundsException in sun.font.CompositeStrike.getStrikeForSlot

We just upgraded a server from RHEL v7.3 to v7.4. This simple program works in RHEL v7.3 and fails in v7.4 public class TestJava { public static void main(String[] args) { Font font = new Font("SansSerif", Font.PLAIN, 12); …
titou10
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How to know that docker installed in redhat is community or enterprise edition?

Some person has install docker in my Redhat system . I want to know whether it is community edition or enterprise edition . How can i do so? I know community edition is not for Redhat . May be some person would have created centos.repo in Redhat and…
Himanshu sharma
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openstack devstack installation stops with Connecting Dashboard Url

I was facing the below errors in OpenStack installation. Problem in connecting the dashboard URL. Changed the url in openrc file by removing version like below http://100.1.201.102:5000/identity. But still facing the same below issue. please let me…
LazyGuy
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Large PCIe DMA Linux x86-64

I am working with a high speed serial card for high rate data transfers from an external source to a Linux box with a PCIe card. The PCIe card came with some 3rd party drivers that use dma_alloc_coherent to allocate the dma buffers to receive the…
LINEMAN78
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6 answers

When and Why run alternatives --install java jar javac javaws on installing jdk in linux

To install java in linux (I used CentOS, RHEL is same too), I used this command rpm -Uvh /path/to/binary/jdk-7u55-linux-x64.rpm and verified java java -version Looking at a tutorial, it says to run following 4 commands, not sure why ## java…
Charu Khurana
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4 answers

(13)Permission denied: Error retrieving pid file run/httpd.pid

I have installed httpd-2.2.29 using commands: ./configure --prefix=/home/user/httpd make make install I configured httpd.conf and tried to start with apache: apachectl start. But got following error: (13)Permission denied: Error retrieving pid…
khris
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2 answers

How to read file through ssh/scp directly

I have a program written in C/C++ that reads two files and then generate some reports. The typical workflow is as follows: 1> scp user@server01:/temp/file1.txt ~/ then input my password for the prompty 2> my_program file1.txt localfile.txt Is…
q0987
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2 answers

Installing rabbitmq-server on RHEL

When trying to install rabbitmq-server on RHEL: [ec2-user@ip-172-31-34-1XX ~]$ sudo rpm -i rabbitmq-server-3.3.5-1.noarch.rpm error: Failed dependencies: erlang >= R13B-03 is needed by…
Jacques Betancourt
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2 answers

How can I auto-deploy my git repo's submodules on push?

I have a PHP Cartridge that is operating normally, except I can't find a straightforward way to get OpenShift to (recursively) push the files for my git submodules when/after it pushes my core repo files. This seems like it should be a super…
Murray Rowan
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3 answers

GDB jumps to wrong lines in out of order fashion

Application Setup : I've C++11 application consuming the following 3rd party libraries : boost 1.51.0 cppnetlib 0.9.4 jsoncpp 0.5.0 The application code relies on several in-house shared objects, all of them developed by my team (classical link…
Shmil The Cat
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2 answers

How to check recently installed rpms?

I am trying to find some recently installed rpms on my redhat linux system, Does RPM provide any way to do this? I have tried #rpm -qa But it only provides installed rpms. What are the options available for this?
user3138046
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