Red Hat Enterprise Linux (RHEL) is a Linux distribution from Red Hat intended for enterprise use.

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Network connection failed :unknown reason:

Im on RHEL, and found that my VPN stopped working. I discovered that I could use the command line utility, nmcli, to try to get more info about what was happening. However, Im finding that the ...
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Git Installation Returns Error 404 On RHEL

I am trying to install Git in my REHL but failed. I have also clean up metadata and everything else by running sudo yum clean metadata and sudo yum clean all but still, the error persists again and ...
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iptables: How to redirect port in Red Hat Linux (RHEL)?

I'd like to forward port 80 to 8080. So I tried to edit /etc/syscongfig/iptables: -A PREROUTING -t nat -i eth0 -p tcp --dport 80 -j REDIRECT --to-port 8080 But got: # service iptables restart ...
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Is it possible to upgrade from RHEL 4 to 6 with up2date(or yum) on or after 2012/08?

I'd like to upgrade my server's os from RHEL 4 to 6 after 2012/08. I know that there are 2 methods to upgrade. 1. directly (RHEL 4 -> 6): 1. buy a new server machine. 2. install RHEL6 on the ...
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Mysterious logout

I'm on Linux, I'm using a Red Hat 6.6 workstation. Every now and then (usually once, sometimes twice a day) I get a user logout. Or something that looks like a user logout: the screen goes black for 1 ...
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mount command times out when trying to mount between servers

I've got two identical RHEL boxes and would like to mount a directory from one to the other. my command: [me@serv_dev ~]$ sudo mount serv_prod:/my/dir /mnt/my/dir times out after a few minutes: ...
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What does NOEXEC flag mean when mounting directories on RHEL?

I am trying to understand the NOEXEC flag when mounting. I am having an execution issue within the /tmp directory on someone elses machine that I cannot access atm where the /tmp directory is mounted ...
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Is it possible to enable / disable yum repository using dnf?

How to enable/disable yum repo (i.e. set enabled=0/1 in /etc/yum.repo.d/*.repo files) using dnf? According to question yum: enable a disabled repository yum can't do that. Used system: Fedora 21
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request_module: runaway loop modprobe binfmt-0000

I'm running CentOS 7. Everything was working fine, until I had one pending update, which I accepted and rebooted. Now the system fails to boot and instead reports: request_module: runaway loop ...
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Virtualbox + RHEL 5.5 = Your CPU doesn't support long mode

I have a desktop computer running the latest Ubuntu 12.10 32-bit. I'd like to run RHEL 5.5 64 bit in Virtualbox (4.1.8). However, when I bootup the VM with the CD, I got "You CPU doesn't support long ...
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464 views

Adding a disk to an Amazon EC2 instance

I am using Amazon EC2 instance where I have low disk space [root@ip-10-59-143-73 ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/xvde1 5.7G 3.3G 2.3G 60% / none ...
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168 views

SSH Gnome Terminal Background/Foreground Colors

How can I automatically change the background/foreground color of my terminal based on the host that I SSH into? My current setup is an Ubuntu desktop running Gnome-Terminal that SSHs into a set of ...
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160 views

Ubuntu 14.04 LTS with Centos desktop look and feel?

I'd like to install an up-to-date Ubuntu distro (14.04 LTS) at home since it is much easier to get desktop applications; however, I'm using Centos 6 at work and I'm used to (and prefer) the desktop ...
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62 views

Connection tracking in Firewalld (CentOS 7)

I can't get vsftpd and firewalld to work together properly on CentOS 7 (without adding the passive range to the firewalld). Looks like firewalld ignores connection tracking (nf_conntrack_ftp is loaded ...
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httpd error reports ExecCGI is off

<VirtualHost *:80> ServerAdmin webmaster@xxxx.xxx.com DocumentRoot /var/www/html/xxxx ServerName xxxx.xxx.com ServerAlias xxxx www.xxxx.xxx.com RewriteEngine on ...
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31 views

VMware Workstation - Linux/gnome screen saver locking of guest and host

I've got some RHEL6 machines that run VMware Workstation 11 on them. The host and the guest are required to have a screensaver enable after 15min of inactivity that goes to a lock screen. My users ...
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How to get xterm on RHEL6 and CentOS6 stock installs?

I have a library of virtual machines on which I am running product testing, and I am encountering an issue with xterm not being found. Originally I thought xterm was a basic terminal installed across ...
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55 views

CentOS 7 will not allow SSH local tunneling for port 80

I am trying to tunnel the remote port 80 of my CentOS 7 Server to my local PC through putty. Nevertheless, I seem to be unable due to security restrictions. Is there a way to loosen them and to allow ...
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Two subnets, defaults to first and second left dead - RHEL 6.4

I currently have bonding configured on 4 Ethernet ports. 2 bonds on one subnet and the other on another subnet. Recently we went from 192.168.3.0/24 subnet to 172.20.0.0/24 subnet and now the 172 will ...
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vmdk file too large but guest os is small

I'm facing a strange issue with my virtual machine. I have an rhel 6.1 guest os running on VMware workstation (9.0.2 build-1031769) hosted on Windows 7 Enterprise 64 bit. The size of the vmdk file is ...
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RHEL 5 box constantly displaying NIC statistics on console screen, how can I disable this?

I have a RHEL 5 box that is constantly displaying nic statistics on the console screen when using the KVM. This makes it very hard to do any troubleshooting when the box goes down as these statistics ...
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Disabling NetworkManager on RHEL 7

I was setting up a RHEL7 server in vmware vSphere and I'm having trouble getting it on the network without NetworkManager. I configured the server to have a static IP during the install process and it ...
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1answer
20 views

How to check permissions in a zip on RHEL?

I have very little exposure to RHEL, and was quite surprised to find that unzip -l and unzip -lv do not include file permissions. I see that extracting files eventually restores the permissions, but I ...
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506 views

How do I enable/set multicast rules using firewalld in RHEL7 / CentOS 7

I cannot find docs on how to enable multicast for firewalld which is the default firewall in RHEL / CentOS 7. Can some enlighten me? FYI: I know how to do it using iptables.
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What killed my process?

Been having a problem with application that keeps getting killed. This is running a RHEL5 server. We ran strace against the process and at the end of the trace file I get a bunch of +++ killed by ...
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39 views

RHEL interface do not up with ipv4 and ipv6 address

Hi everyone On my server with rhel 6.6 I configured interfaces with two addresses: ipv4 and ipv6. When I make down that interface and then up. Interface up with only one address ipv4 as default. If I ...
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Iptables Port Forwarding To Different IPs Based on Port [duplicate]

On a CentOS 6 server with an IP address of 172.16.1.10, how can I configure iptables to route traffic destined for 172.16.1.10:80 to 192.168.1.10:80, and traffic destined for 172.16.1.10:8080 to ...
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64 views

Finding files matching path pattern and size criteria

I have a server (RHEL 5) with 50+ websites currently running on the same eCommerce software, today I found one of the error log files was over 3GB in size Is there a way I can find all files over say ...
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49 views

How to enable the splash screen in RHEL 6.6?

How to show the splash screen while booting RHEL? There should be some method which reloads all kernels. The Basic grub.conf is normal, the rhgb option is enabled.
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RHEL 6 HP Tape Driver Installation Troubles

Trying to install tape drive drivers for the HP Ultrium 3280 SAS using this guide http://h10032.www1.hp.com/ctg/Manual/c02262008.pdf Whenever, I try to execute mkltfs I get this error mkltfs: ...
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638 views

failed to open stream too many open files - php 1024 maximum limit - Redhat - why isn't new limit working?

I've got this message while debugging a problem in a PHP program. I've already edited the /etc/security/limits.conf and added * hard nofile 500000 * soft nofile ...
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401 views

How to add a compiled ntpd in services on linux?

I compiled and installed ntp-4.2.8 using this link and created a rpm by running checkinstall on RHEL 6.5. I used the command ntpd -l logs to manually start ntpd. After starting I am able to verify ...
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738 views

How do I upgrade scientific Linux 6.3 to 6.6

Upgrading Scientific Linux 6.3 to 6.6 I have to update machines of SL6.3 to 6.6. I tried #yum list updates and .# yum update It downloaded some files and installed . But my SL is still showing SL6.3 ...
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Redhat Linux /lib/libc.so.6: version `GLIBC_2.16' not found (required by /lib/libncurses.so.5)

I am running a server RHEL 6.4 which currently has GLIBC 2.12 installed on it. We are trying to run a program which gives this error /lib/libc.so.6: version `GLIBC_2.16' not found (required by ...
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124 views

Link issues with fiber card under RHEL 6.2 and hp dl380

I am having issues getting a HP ProLiant DL380p Gen8 running RHEL 2.6.32-504.el6.x86_64 to see and/or allow the use of a 10GE fiber card. I can confirm the fiber connection to the router has been ...
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353 views

RHEL6: repo won't enable

Mount DVD [root@rhel66 ~]# mount /dev/sr0 /media Install the repo metadata [root@rhel66 ~]# cp /media/media.repo /etc/yum.repos.d/rhel6.repo List the repos [root@rhel66 ~]# yum repolist all ...
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206 views

No ntp.conf file after compiling ntp on Linux

I'm using RHEL 6.5. I compiled ntp-4.2.8 using the steps on this link. but I don't have a ntp.conf file. ntp.conf is required to start ntpd but after compiling, there is no ntp.conf on my system. I ...
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637 views

CentOS 7 can't ping from server

I'm having a Strange issue with CentOS 7. I have my server setup with 2 NICs a private network and a public network. I'm able to ping the server on both the private and public IP. But I cannot ping ...
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2k views

How to resolve rpm dependencies

I am trying to install libtirpc on RHEL 6.5 but it fails and asks for dependencies. Why here it is showing three GLIBC versions 2.14, 2.15 and 2.16. ?? Does it mean that any of these three versions ...
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Need to set mailx variable to specify the From address

Running Oracle Linux 5.8 (which is just re-branded RedHat EL 5.8) I must change the From address. But we have scripts that use mailx which cannot be re-written to use any extra flags, so I'd like to ...
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Comparison between Oracle RAC Cluster Database (10gR2, 11gR2 and 12cR1) and deployed Oracle DB on Linux Cluster [closed]

Oracle RAC implementation may be costly for small enterprise, but how it would be if Linux cluster is implemented and then standard Oracle DB is deployed on that cluster to achieve availability like ...
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147 views

access control list share file but not directory RHEL6

I have a file that I want to be accessible by a single user, but I don't want the user to have access to the folder it resides in. My understanding is that the following steps should work, but they ...
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How to create a bootable usb stick for ubuntu on RHEL 6

NOTE: this question was asked in askubuntu, and I was suggested to ask here. I want to create a bootable usb stick for installing ubuntu 14.04 on my laptop. Currently I have access to an RHEL 6 ...
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Fibre Channel: QLogic Corp. QLA2300

My system is an Altix3000 running: (Linux sgialtix 2.4.21-sgi304r1 #1 SMP Sat Jan 29 22:43:29 PST 2005 ia64 ia64 ia64 GNU/Linux) (redhat-release=redhat-release-3AS-8.3). Which command do I use to list ...
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Updates don't install complaining about missing dependencies when dependencies are clearly installed (RHEL 6)

I have installed RHEL 6.2 and I am upgrading all the packages on it right now. I was expecting auto update to work, but I get these error messages when I authorize an auto update - ...
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CentOS 6 with User Permission (Read at message)

I have create users on CentOS 6 between test1 and test2 so I login on user test1 on ssh and i tried to access home dir of test2 so why it can access? how i can setting for other users can't access ...
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201 views

What is the purpose of the `daemon` group and user on RHEL/CentOS Linux?

I am on CentOS 6.5 and about to add a service to the system with chkconfig. It will run with its own system account, let's call it (the account) foobar, but I do not see the point of also creating the ...
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Installing Nvidia drivers on Red Hat

I wanted to install Nvidia drivers. Can you tell me why the following is not working : [root@INEICP-EPM-W134 Downloads]# rpm -Uvh XFree86-4.3.0-35.EL.src.rpm warning: XFree86-4.3.0-35.EL.src.rpm: ...
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FTP from windows to linux using filezilla causes doubling of file sizes?

Running filezilla 3.3.0.1 (and slightly older versions exhibit this behavior as well) to Red Hat Enterprise 5x with filezilla server, we are getting doubling of text files on overwrite. It seems to ...
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806 views

cp --update still copies unchanged files

I'm trying to copy only changed files using 'cp -pu' under Linux (Red Hat 6.1, source/destination FS are GlusterFS mounted partitions) but I found that it still tries to copy file seemingly old and ...