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

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How to remote install CentOS/RHEL 7 using a rescue image like GRML?

Assuming a remote machine where you can PXE boot into a GRML image that also provides ssh access. Now the question is how to install CentOS in such an environment. Something like KVM access is not ...
3
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1answer
541 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 ...
2
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1answer
32 views

Is it possible to mount two different external nfs filesystems into 2 directories with the same radix (overlapping)?

I'd like to know if it is possible to mount two different external filesystems via nfs into two directories that overlap. Do the overlaping directories cause any issues? /usr/proj/projectA ...
2
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1answer
564 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 ...
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3answers
31 views

ps to show only processes that match more than one condition (AND)

According to the ps man page: Except as described below, process selection options are additive. The default selection is discarded, and then the selected processes are added to the set of ...
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1answer
3k 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: ...
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1answer
22 views

Is it possible whole Partition with same structure in Linux

Well one of my colleague installed fresh OS Redhat 6 on already in use test server. Now we got in trouble and needed to recover whole partition which is already formatted during new installation. Is ...
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1answer
17 views

Confusion regarding generating self signed certificate for application portal developed using liferay

We have a Application Portal developed using Liferay bundled with tomcat. There are two application servers running liferay and we use httpd as a front-end which forwards requests to application ...
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0answers
21 views

Creating Self signed certificate for tomcat 6

I am trying to configure self signed certificate for our tomcat server. For that initially I created the keystore certificate file using keytool . The command I tried for this is keytool -genkey ...
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1answer
133 views

File of Doom freezes any computer that attempts interaction

I have a file on an internal server that causes any machine that interacts with it to immediately and irrecoverably freeze. By interaction, I mean just about anything: rm, mv, cp, cat, vi, gedit, ...
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1answer
84 views

Yum not working at all

I ran the command yum clean metadata and then ran the command yum update. When I ran the yum update I now get the following errors Loaded plugins: product-id, security, subscription-manager This ...
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2answers
38 views

Unable to create partiton when installing RHEL 5.8

I am trying to install RHEL 5.8 on my IBM server. When I try to create a partition manually, I get the following error message. Your boot partition is on a disk using the GPT partition. How can I ...
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2answers
61 views

how to test if can connect to port in rhel 7 (telnet client?)

On my local machine some network application is launched on port 3333 and I want to check that it "accepts connections". In this case in Windows I just type telnet to launch telnet client, and then o ...
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2answers
31 views

xfs maintenance mode in redhat 7

In my desktop I installed redhat 7 and after reboot it went to maintenance mode, After entering the password it is not allowing to do a file system scan for root and every time it boots enters to ...
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2answers
91 views

Forward port 22 out a particular interface

The situation I'm in is where we have three separate interfaces on a particular machine. Each connected network only allows servers (by network-based routing/firewalling) to only offer particular ...
5
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3answers
2k views

RHEL - Uuencode + mailx = gibberish

I understand uuencode is for encoding files, and mailx sends mail. However, I'm not exactly understanding... Why uuencode file file | mailx -s "subject" email_adress keeps sending messages with the ...
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3answers
16k views

CentOS - install using yum Apache 2.4

I need Apache 2.4 in CentOS because with Apache 2.2 mod_proxy_wstunnel is not possible. I have tried https://fedorahosted.org/SoftwareCollections/ but unfortunately its for RHEL after installing i ...
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1answer
572 views

Authconfig contiously rewriting the /etc/sysconfig/authconfig file, messing up Puppet run

I have been using this LDAP module for a long time in my Puppet environment. The module uploads these files to the RHEL-servers: /etc/openldap/openldap.conf /etc/pam_ldap.conf /etc/nsswitch.conf ...
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1answer
855 views

Nslookup: command not found error on RHEL/CentOS 7

During linux installation I selected "minimal" option: When I went to run the nslookup command to look up an IP address I got the error message nslookup: command not found as shown in the example ...
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2answers
2k 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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0answers
83 views

Unable to add eth0 in Rhel 7

I am unable to find eth0 in RHEL 7 after just installation. Even I created the eth0 inside the /etc/sysconfig/network-scripts/ directory. After created eth0 inside the network-scripts, I am unable to ...
0
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1answer
510 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 ...
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2answers
4k views

Why is yum not installing my softwares on RHEL 6 ?

I am trying to install avr-gcc using yum on a RHEL 6. But I get this error. [root@xilinx etc]# yum install avr-gcc Loaded plugins: refresh-packagekit, rhnplugin There was an error parsing the RHN ...
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2answers
2k 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 ...
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32 views

Cannot type in login credentials in Red Hat

Got stuck at the login window (Red Hat 6.5) as I cannot type in the login ID. No characters are accepted in the box. MouseOK. Any ideas?
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1answer
24 views

Adding routes for configured virtual IP addresses of different segments

I have configured virtual IP addresses in different segments as below in RHEL box. eth0 - 192.X.X.208/27 eth0:1 - 192.X.X.219/27 eth0:2 - 10.72.X.19/24 eth0:3- 10.72.X.20/24 The problem here is as ...
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1answer
34 views

screen command cannot find java executable

I'm trying to execute java from screen: screen -S my-java-app -d -m 'java -jar -Xms512m -Xmx2048m my-java-app.jar' but seems that screen does not know the java command. Running java without screen ...
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1answer
867 views

Install RHEL 5.7S on machine with 4TB disks

I'm getting errors about GPT when installing OS using kickstart. The Dell R720 has 8x 600GB SAS. I can't figure out what to configure in BIOS and kickstart file. In BIOS, there're boot options of ...
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1answer
39 views

Where can I download the software RPM for Redhat?

I try to download some software RPMs(such as gcc, gdb, etc.) for Redhat enterprise version. But after googling, I only find this website:https://access.redhat.com/downloads. This site doesn't seem to ...
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0answers
160 views

Installation of Pacemaker Corosync on RHEL Server 6.6

I was trying to install Corosync and Cman using yum install -y pacemaker cman pcs ccs resource-agents This works fine on CentOS 6.3. Tried the same on Redhat Enterprise Linux Server 6.6 and ran ...
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2answers
118 views

Can't start systemd user instance

I'm using CentOS 7, and am trying to create a systemd service for my local user. However, before I can do that, I need my systemd user instance, which I cannot find or create to begin with. Running ...
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4answers
198 views

Why doesn't the nohup command seem to be working?

Please let me know any example that shows nohup is working for a program even after logout. I tried using it without the nohup command to run a script in the background and it seems to be working even ...
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2answers
29 views

Garbage hex bytes in wtmp file

I have been trying to extract the boot and login history for a test PC running RHEL 5.8 with some kernel updates. I started by using last -f /var/log/wtmp, and noticed some strange results. Further ...
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0answers
29 views

Utilizing Samba Shares Without using Winbind

I am curious if it is possible to use samba shares without using winbind. In our current environment we are using SSSD, Kerberos, and Samba to complete the required tasks such as joining the windows ...
3
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4answers
394 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
23 views

yum groupremove 'Development Tools': keep packages required by other packages

I did: yum groupinstall 'Development Tools' Now I want to remove it: yum groupremove 'Development Tools' But it marks for deletion many other packages that require binutils. How to keep binutils? ...
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3answers
3k views

RHEL:Change Screen Resolution of Virtual Console

I am working on a RHEL 6.3 Workstation. And the monitor is a HD AOC Monitor. Problem I am facing is whenever this machine starts up, it runs with maximum screen resolution. It is a big screen and ...
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2answers
2k views

What does eno mean in network interface name 'eno16777736' for CentOS 7 or RHEL 7?

Under consistent network device naming scheme, what does 'eno' stand for in network interface name 'eno16777736' for CentOS 7 or RHEL 7?
40
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9answers
59k 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 ...
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2answers
153 views

What is the correct way to resolve this rpm conflict? (Error: p11-kit-trust conflicts with nss-3.13.3-6.el6.x86_64)

It has been a while since I updated one of my RHEL6 machines (except for the occasional update of specific packages with known vulnerabilities). As a result of this, I have an old ca-certificates ...
3
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1answer
484 views

How to get hgk working on RedHat Linux?

I plan to get hgk to work.However, no matter how I configure the redhat linux, it still does not have any response. Here is information for my machine. RedHat 5.3 Mercurial 1.8.1-1 I installed ...
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0answers
22 views

unable to update HTTPD, mod_jk dependency error

While trying to update httpd in RHEL6, getting some dependency error as below: Unsatisfied dependencies for mod_jk-ap20-1.2.31-1.x86_64: httpd = 2.2.3 is needed by mod_jk-ap20-1.2.31-1.x86_64 I am ...
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6answers
7k views

Script to check for read only filesystem

How can I check a bunch of systems to find any filesystem that are mounted read-only? Possibly via a script?
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2answers
527 views

Is there a newer version of gcc in red hat?

I use Red Hat Enterprise in my school and I want to compile some c++11 code but the gcc --version is 4.4.7 which is not compatible. Is that one the latest version in the red hat repositories? is there ...
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2answers
3k 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 ...
2
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1answer
23 views

How do I make my boot.log more verbose?

I am trying to resolve an issue about our /etc/resolv.conf getting reset to old values or getting empty. I see a function defined in /etc/sysconfig/network-scripts/network-functions that could be ...
4
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3answers
4k views

List all RPM packages installed from repo “X”

How can I get a list of all of the RPM packages that have been installed on my system from a particular repo (e.g., "epel")?
2
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1answer
159 views

Disable daylight saving time

Using C functions (time and localtime) I am getting: timezone:18000 daylight:1 means :dl timezone -24 (-360 minutes) GMT. We do not want to add the daylight and keep using GMT -5 and not GMT ...
1
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1answer
430 views

BOOTPROTO=none | static | dhcp and /etc/resolv.conf

What does it mean when it says BOOTPROTO=none in the /etc/sysconfig/network-scripts/ifcfg-eth0 file. I remember there used to be BOOTPROTO=static and it was very clear and straight-forward in telling ...
0
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1answer
44 views

Frequently Internet Disconnects

I have installed RHEL 5.8 on IMB server. Also I have configured static IP through eth0. When I try to ping any website e.g. google.com, yahoo.com It works only for 25-40 seconds and internet ...