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

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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 ...
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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, ...
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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 ...
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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 ...
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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, ...
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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 ...
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24 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 ...
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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 ...
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2answers
21 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 ...
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25 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: # ...
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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 # ...
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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 ...
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2answers
24 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?
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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 ...
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16 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 ...
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2answers
25 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 ...
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1answer
17 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 ...
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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 ...
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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 ...
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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 ...
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116 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 ...
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1answer
22 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 ...
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1answer
27 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 ...
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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 ...
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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 ...
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2answers
98 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 ...
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18 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 ...
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1answer
58 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 ...
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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 ...
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2answers
69 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 ...
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43 views

Problems with permissions for /tmp

I executed command: chmod 1777 /tmp Now I get these results of executing the ls command from root: ls -ld /tmp drwxrwxrwt 4 root root 4096 Aug 9 05:42 /tmp and from not-root user: ls -ld /tmp ...
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44 views

RHEL 5 license for RHEL 6?

A few years ago We have bought a "Redhat Enterprise Linux 5 Server" license, we used that license only on offline servers. Now we are migrating to a new system, we need to install RHEL 6 which will ...
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21 views

Install `mpl_toolkit.basemap` on RedHat without compiling from source

I need to install matplotlib and mpl_toolkit.basemap on a RedHat machine. matplotlib is already installed but for mpl_toolkit.basemap the only way I could find was to download the source and compile ...
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4answers
67 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 ...
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21 views

centos 7, xhost and other user than root

The following worked under CentOS 6: sudo su xhost + su - oracle xclock Under CentOS 7, I get an xclock after sudo su and xhost +, but a DISPLAY error when changing to the other user. Am I ...
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1answer
15 views

Sendmail Message Fail

On my Redhat Prod Server I installed Sendmail that I will use to send DB Backup completion mails to my email id. When I send a email from My Server A 172.16.233.2 to my email id abc@domain.com. using ...
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2answers
39 views

Redhat subscriptions - synchronise subscriptions

I have inherited a system admin role of a small cluster of redhat machines - most running rhel5 and one machine running rhel6. My sys admin skills are at the moment poor but I would like to improve ...
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32 views

How to disable SELinux without restart?

I need to disable SELinux but cannot restart the machine i followed this link where i get bellow command setenforce 0 But agter running this command i checked for that sestatus SELinux status: ...
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34 views

Unable to install Crypt::SSLeay perl module on RHEL 5.7 (x86_64)

Here is the scenario, actually my RHEL 5.7 (x64_86) server don't have internet connection. but I want to install Crypt::SSLeay perl module on that server. So I downloaded it from CPAN & then ...
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3answers
84 views

Run a script on multiple shells?

I have two servers one AIX with default shell ksh, the other RHEL with default shell bash. I have a script that is mounted on both that will run similar commands but for either AIX or Linux. This ...
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1answer
47 views

rhel 6 default gateway not working

I have six similar RHEL 6 servers in the lab and the settings are same in all the servers. The settings are, static IP address: 129.XXX.XXX.XX Subnet Mask: 255.255.254.0 Default Gateway: ...
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1answer
125 views

Redhat “httpd” can not start anymore. Showing “suEXEC” and “SELinux” notices

I'm on RHEL 6.5 and Apache 2.2.15. When I restart the httpd, I can not start that httpd anymore. Showing following things in the /var/log/httpd/error_log: [Fri Aug 01 18:31:48 2014] [notice] suEXEC ...
2
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1answer
45 views

What is the purpose of UUIDs for NICs?

On Fedora/RHEL/CentOS there is a line in /etc/sysconfig/network-scripts/ifcfg-x files which defines UUID: UUID=30fcd648-ad1e-4428-as6f-951e8e4d16df NICs have MAC addresses by them selves, so what ...
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56 views

How to configure a “point-to-point” connection with RedHat 6.5?

My servers are hosted at Hetzner and I need to create a point-to-point connection to my gateway. The server can only reach its gateway (and its locally configured) IP addresses directly. All other ...
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Is there anything in RHEL 6.5 that would affect I/O speed for something <24K vs >24K?

Generally, transactions for my app of setting and getting data internally are measured in a couple of millis. However, over 24K in size, that time can jump to just over 100 millis. Is there anything ...
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59 views

RHEL 6.4: Openssl 1.0.0-27 libcrypto and libssl missing

I am trying to install znc IRC bouncer, which needs openssl libraries: Error: Package: znc-1.4-1.el6.x86_64 (epel) Requires: libcrypto.so.10(libcrypto.so.10)(64bit) Error: Package: ...
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73 views

The equivalent of start-stop-daemon for RedHat 6

I have an upstart script to create a service in RedHat 6: env PLAY_BINARY=/usr/bin/play env HOME=/opt/warda env USER=root env GROUP=root [...] script exec start-stop-daemon --start --exec ...
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24 views

Samba 3 file sharing access permission problem onWindows

I'm trying to set permissions on a server RHEL v5 whith Samba v3. The configuration of /etc/samba/smb.conf is [project] valid users = proyecto, admin writeable = yes ...
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1answer
35 views

How does Grub boot off of a Windows partition?

I have a dual boot laptop that was built by Dell with Windows/Red Hat. The grub configuration says that it was made by Anaconda. The partitions are as follows: /dev/hda1 Dell Utility /dev/hda2 ...
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2answers
34 views

Creating a GnuPG keyring for apache

Here's the scenario, we're using GnuPG to encrypt data between 2 web servers. 1 is on RHEL. GnuPG will be accessed through cgi scripts to encrypt and decrypt. So I need a keyring that the apache user ...