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

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6
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3answers
524 views

How to stop Fork Bomb out of memory error - RHEL 6

I set up test VM to test the effect of fork bombs. So I edited the limits.conf as follows for root user: root hard nproc 512 Now I drop a fork bomb like so: :(){ :|:& };: After ...
2
votes
2answers
549 views

RHEL7 text-only installation

I want to install RHEL7 in purely text-only mode. Although I added the inst.text and inst.cmdline kernel option (since I want it to install from kickstart) it still requires more than a console as it ...
0
votes
1answer
28 views

Running Apache server causing machine to run out of space

I was running my Apache server on RHEL 5.5, and noticed when I typed: df -h, that I was getting: [root@localhost log]# df -h Filesystem Size Used Avail Use% Mounted on ...
1
vote
1answer
354 views

how to add shortcut keys to custom.desktop in RHEL6?

i have created custom.desktop in the /usr/share/xsession directory for launching single application. i want to add one or two desktop shortcuts along with the single application.
2
votes
1answer
282 views

Install 32-bit library packages on 64-bit rhel 6.2 during installation of os

I want full installation of rhel-server-6.2-x86_64. Within this setup, I want to install some of 32bit glibc packages before completion of installation, which already available in ...
0
votes
0answers
12 views

Gnome Shell shortcut directly to Workspace List overlay?

Is there a way in Gnome Shell to define a shortcut that will bring up the Overview such that the Workspace List is already showing and available for clicking -- similar to the viewport selector in ...
1
vote
3answers
12 views

Other than via configuration in /etc/yum.repos.d, where else can a repository be configured?

Helping out someone who inherited his environment. He wants to disable some repositories. This is an anonymized output of his yum repolist: luke@server1 $ sudo yum repolist Loaded plugins: rhnplugin, ...
0
votes
0answers
3 views

How to increase horizontal and vertical default spacing between icons on desktop at EL6

I have installed centos 6.5, by default icons are appearing very near to each other on desktop. From where I can increase space between them? Any clue? Which file is recommended to modify manually, ...
0
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0answers
8 views

How to use scanner drivers api in Linux shell script

Usually when scanning any page using Canon DR- 2050C scanner in windows it rotates vertical text paged to horizontal automatically for the easy reading of the user. In Linux we are manually scanning ...
0
votes
0answers
22 views

bash script to verify rhel patching

we have several redhat servers which we patch from redhat satellite. To avoid confusion, I'll use the term "host" to denote the server which is being patched. We have a script, say, patch.sh, which ...
4
votes
3answers
425 views

Is there is tool similar to ShiftIt on OS X?

I'm looking for a keyboard controlled window sizing utility similar to ShiftIt on Mac OS X: https://github.com/fikovnik/ShiftIt
0
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0answers
9 views

facing issue while installing oracle Database 11g on rhel5 And SOA

While installing required rpms for both SOA and Oracle the below rpms are conflicting with each other glibc-devel-2.5-49.x86_64.rpm and glibc-devel-2.5-24.i386.rpm How can I fix it? one package gets ...
0
votes
1answer
1k views

Could not open /dev/vmmon: No such file or directory

I've installed VMWare Player 6.0.1 build - 1379776 on a Red Hat Enterprise linux Server release 6.1 Beta ( Santiago ). When I attempt to start my virtual machine, I get the following the error: ...
18
votes
4answers
2k views

What makes CentOS “enterprisey” compared to “generic” distributions like Ubuntu?

What makes CentOS "enterprisey" compared to "generic" distributions like Ubuntu? When I say "enterprisey" I actually mean "better for server deployments". Just a general question, because I was ...
1
vote
2answers
34 views

profile.d on headless server

Is it a bad idea to put variables needed by a daemon program running at boot on a headless system in /etc/profile.d/? From my understanding profile.d doesn't get executed until someone logs into the ...
1
vote
2answers
22 views

equivalent of update-grub for rhel/fedora/centos systems

In Ubuntu (and I guess in Debian too) there is a system script named update-grub which automatically executes grub-mkconfig -o with the correct path for the grub configuration file. Is there any ...
0
votes
0answers
28 views

Difficulty Installing SSH on Oracle RHEL 5.5

I am having difficulty installing SSH on RHEL 5.5 - I have disabled my Firewall and SELinux. I have gone through: Oracle Docs, to see if SSH is enabled, but I got: To check if SSH is enabled: # ...
0
votes
1answer
27 views

Difference between telinit and running scripts manually under rc*.d

I was trying to debug my Linux boot process. If I set the default runlevel to 2 or 3, my system hangs without giving me a prompt. I was able to get to runlevel 1 via a kernel parameter, and ran all ...
1
vote
1answer
288 views

obsoleted package breaks yum install of older JBoss

I need to install an older version of JBoss. 6.1.0 EAP is what has been approved and supported for my application. So when I try to force install the correct version of the jbossas packages the ...
0
votes
2answers
518 views

Why does “yum update” fails with many duplicates, after many months of no upgrades?

After many months (> 6) of no software upgrades, I logged into an EC2 instances running: Linux version 2.6.32-358.23.2.el6.x86_64 (mockbuild@x86-022.build.eng.bos.redhat.com) (gcc version 4.4.7 ...
3
votes
1answer
391 views

GDM will not start on boot, unable to login into graphical interface

I am running RHEL 5.8 . SELinux is enabled but in permissive mode. Here are some snippets from /var/log/messages on boot. kernel: type=1400 audit(1360613500.551:6): avc: denied { write } for ...
0
votes
0answers
36 views

/etc/sudoers automatically reverts back [closed]

I am facing a weird issue. I ran visudo and added 3 new lines and could see that those lines were added to /etc/sudoers as well. But it's not lasting for more than 10 minutes or so. After 10 minutes ...
3
votes
1answer
25 views

Service script calls another script with variables

I have a simple service script tomcat7 in /etc/init.d/ to start and stop my app server (tomcat) under the tomcat user. On RHEL6. #!/bin/bash # description: Tomcat Start Stop # processname: tomcat # ...
0
votes
2answers
25 views

What are the difference between SLED and RHEL WorkStation?

What are the difference between SLED and RHEL WorkStation? What are the advantages over community supported distros?
0
votes
1answer
315 views

linux + how to install glibc.i686

I try the following, but I get No package glibc.i686 available. What do I need to do in order to install the glibc.i686? Or maybe there is another way to solve this problem? yum install glibc.i686 ...
1
vote
1answer
22 views

dnsmasq no address available?

I am getting this error in my /var/log/messages file. dnsmasq-dhcp[xxxx] DHCPDISCOVER(xxxxxx) xx:xx:xx:xx no address available How can I tell what leases dnsmasq has leased out? And how can I free ...
35
votes
8answers
51k views

Is CentOS exactly the same as RHEL?

I'm sure this question has been asked again and again elsewhere (I did not find anything specific to CentOS vs RHEL in SE), but I would still like to ask and confirm a few specific points. I am well ...
0
votes
0answers
131 views

Redhat / Centos 7 Firewalld best practice for pptp or L2TP/IPsec rules

Having a quick look at Centos 7, and though I'd spin up a VPN daemon or 3, but immediately discovered the usual packages aren't yet in the core repositories, so had to dig around and found the ...
0
votes
2answers
70 views

Authentication very slow (both with ssh and su)

I'm having a problem on one of our production servers where the login attempts become progressively slower as time passes. After roughly 5 days it becomes so slow that some critical processes/cron ...
0
votes
0answers
42 views

Is there anyway to download an entire RHEL repo from windows?

I have a number of offline machines RedHat machines that I need to update, and I have an active RedHat subscription for all of them. I am unable to get an internet connection to these machines so I ...
0
votes
2answers
24 views

rc.local hang on bootup

My rc.local is stuck in an infinite loop since I accidentally put a wrong I/O redirection in and it's executing itself over and over again. I'm on Red Hat 6.5 and would like to know how I can start ...
1
vote
0answers
17 views

Do we need a separate Metadata server to use pNFS?

So we upgraded some of our servers to RHEL 6.5 and I came across pNFS while reading through the release docs. According to various docs available online, the performance improvement is huge over ...
0
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2answers
562 views

Distro for high end video editing

Which distro would be most suited for maximizing hardware to perform expensive video editing and optimize resources. I followed up with optimizing resources, as in some cases one operation may not be ...
6
votes
1answer
13 views

Linux kernel 3.10.0-123.4.2 processes [flush] aren't present

I am using CentOS 7 with "3.10.0-123.4.2.el7.x86_64" version, but I don't know why the kernel threads named flush aren't present in this kernel version. I tried to look in the kernel change log, but ...
0
votes
2answers
28 views

Yum file conflicts due to my mistake. How do I fix?

I did something stupid. I simply scped my rpmforge repo files from another (working) machine on to my dev box, and ran yum update. This yielded: root@dev07 /etc/yum.repos.d # yum update Loaded ...
1
vote
1answer
18 views

OpenJDK update in RHEL 6

We need to apply the JDK updates to one of the RHEL 6 servers. How do I apply the patch if I have the RPM package available, which I have downloaded from the internet. Searched a lot on the internet ...
2
votes
2answers
2k views

Install mono and Monodevelop on a new Redhat 6.5 Workstation

Does anyone know how to install Mono and MonoDevelop on a Redhat 6.5 Workstation. I've tried a number of different things but nothing has worked. I tried using git and building with make from the mono ...
1
vote
0answers
18 views

MongoDB “service” on clean Redhat can not be started

I just bring up Redhat 6.5 64-bit from AWS and did the below things: Disabled SELinux Disabled Iptables All ports opened in Security Group Rebooted Then i just followed, both of the below ...
1
vote
1answer
23 views

Kernel logs on power failure

I was wondering if it was possible to have a logging program document a random power failure. Clearly it won't have any time to log when the power fails, but is there a way to recognize a power ...
-2
votes
4answers
69 views

nohup command doesn't seems to be working?

Please let me know any example that shows nohup is working for a program even after logout , as i tried using without nohup command to run a script i background and it seems to be working even ...
1
vote
1answer
577 views

Can't boot into single user mode

I hosed my login (bad script /etc/profile.d) and I can't SSH into my system or boot it into single. I append " single" to the end of the kernel boot parameters and it just keeps booting like normal. ...
6
votes
1answer
296 views

Mailman / Postfix Configuration Assistance

I am writing for some help regarding Postfix configuration. I cannot seem to get Postfix configured properly to transfer mail to the mailing list installed on the same server. I followed many steps ...
0
votes
1answer
29 views

How can I set up Virtual Hosts in Centos7?

I am trying to set up virtual hosts in Centos7. I followed this guide: http://twohlix.com/2011/05/setting-up-apache-virtual-hosts-on-centos/ however I keep getting the following error: Job for ...
2
votes
2answers
110 views

How can I make iptables service start automatically after reboot on CenOS/RHEL7?

I am having a few issues with a newly installed home server I am preparing. I have installed CentOS7 on it and I found that port 80 and 443 are off by default. I therefore added them to the iptables ...
0
votes
0answers
23 views

Disa stig viewer don't read the log file

I'm working with a dev group deploying RHEL 6.5. I have used the stig-fix-el6 stig master to stig my system. I attempted to use the Disa stig viewer to view the log, but it doesn't read the file. It ...
0
votes
1answer
451 views

how to have root partition LVM for RHEL 5.8 64 bit on AWS EC2

I am new to this and I have to create a RHEL 5.8 Amazon Machine Image (AMI) in which the root partition should be a logical volume. I know how to create a data partition as a logical volume but am not ...
0
votes
0answers
19 views

Generate what a GRUB2 kernel line would look like

In GRUB 0.97 we were able to see what the kernel line/options would look like by just viewing /boot/grub/grub.conf. Now the only way I know how to check the next boot kernel options/kernel version ...
3
votes
1answer
60 views

What is the difference between hostname, hostname --fqdn, and hostname -A

I have a machine I changed the hostname of. I changed it in /etc/hosts, /etc/sysconfig/network, and with hostname command. hostname returns the correct shortname, hostname --fqdn returns the expected ...
3
votes
3answers
7k views

How to create Local Repositories in RHEL

I need to create a local repository in RHEl 5.5. i386 Because when I type some command in terminal it say that RHEL is not subscribed with RHN which is true. I took it from friend. So can someone ...
1
vote
0answers
14 views

Kexec immediately after Kickstart install (where is cmdline?)

I used to be able to kexec into a new kernel immediately after a kickstart (anaconda) install via pxe. I was able to do this by figuring out the current kernel version, and grabbing cmdline options ...