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

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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 ...
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1answer
481 views

How can I make the eth1 up and always available for remote access, where eth0 will be used for host to host IPSec VPN?

I am running Amazon EC2 instance with Red hat enterprise linux, where I have two network interface. Now: eth0 is currently active having public ip where I am remotely logged in via SSH, to ...
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1answer
30 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 ...
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12 views

Always try to stop daemon on shutdown without a lock file in /var/lock/subsys/

Normally, if a lockfile doesn't exist in /var/lock/subsys/, rhel doesn't try to stop the daemon, even though a link exists: /etc/rc0.d/K??svcname. There're daemons that are not always started by ...
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3answers
2k views

Some Ossec agents not able to communicate with OSSEC server

I have installed Ossec on one server and agents on some other servers running on Redhat. The issue is that some servers are able to communicate and send the logs to servers and others are in INACTIVE ...
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44 views

Unable to start network, <IP> is already in use for device eth0, but its not

A wierd issue after we migrated some of our servers to a new DC. We assigned new IPs to all the machines and all the servers are working fine except one. It is not picking up the new IP address and ...
2
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1answer
84 views

Install Solaris 8 on Qemu-SPARC

I've been struggling with installing Solaris 8 Sparc-32bit on Qemu for a while. So far I've viewed several sites with instructions on how to install Solaris-sparc32bit on Qemu. But only yesterday was ...
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2answers
18 views

RPM command stuck/FREEZE when installing RPM file

I want to install the following rpm from some reason RPM is stuck or freeze and not install the RPM package also I cant stop it by control C , please advice what could be the problem ? root]# rpm ...
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1answer
32 views

remote connect to RHEL with X server from Windows

I have remote RHEL 7 server. I have Windows laptop. I want to connect to RHEL with UI (X Server). (So far I only have ssh connection using Putty.) What tool should I use?
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17 views

Xorg consumes CPU, RHEL 7 fresh install

I've installed RHEL 7 with default settings. I wonder why Xorg consumes 30% of my CPUs. How can I know what's wrong and how to fix it? HP DL360p Gen8, dual Xeon E5-2640
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33 views

How to unload X server / switch to command line and back on the fly

I often need UI to configure my server, even to run Eclipse and work there, but in "production" i want to have only mandatory things running - just command-line and no UI. If I'm running UI on Linux ...
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49 views

Make one VNC server appear as two displays in RHEL

I have a VNC server running in virtual mode in RHEL and I am viewing it on a PC which has two screens. I can make the server use both of my screens by setting the resolution large enough: xrandr -s ...
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1answer
3k views

NFS Mounting Error

From ServerA I shared directory /u001/app/oracle/FolderA and trying to mount this on SeverB under /media Contents of ServerA /etc/exports file /u001/app/oracle/FolderA ServerB(rw,sync) When I ...
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1answer
504 views

Can you create a volumegroup in LVM that all the Logical volumes created under it will be thin provisioned?

I would like to know if it is possible to create a volumegroup in LVM that all the Logical volumes created under it will be thin provisioned? This will be used on RHEL 6 which does include thin ...
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1answer
22 views

Need of built-in zone files in named.conf

I am setting up a DNS(Bind) server and by default the /etc/named.conf has the following entries: zone "." IN { type hint; file "named.root"; }; zone "localdomain." IN { type ...
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1answer
33 views

Unable to Configure Quotas in RHEL6 & CentOS6- quotecheck returns error message

Unable to Configure Quotas in RHEL6 & CentOS6- quotecheck returns error message I've created new partition(/dev/sda6) and mounted it(on /hulk). Edited /etc/fstab file to give quotas on the ...
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30 views

Dual monitor display: Drag icon to second monitor appears on first monitor

I am running RHEL6 with dual monitor display with separate desktops. I have appended my xorg.conf file which I created using nvidia-settings. All seems to be working well until I try arrange desktop ...
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1answer
25 views

RHEL 5 Booting from Local Hardisk & SAN Harddisk via grub

I had a RHEL machine booting from local disk. Later I removed local disk & booted from a SAN disk and installed RHEL on it. Now I have read about a grub.conf file: root (hd0,0) kernel ...
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1answer
4k views

install latest gcc on rhel 6 x86_64

I have an RHEL 6 server with gcc version 4.4.7. I wanted to update the gcc version (I think the current one is 4.8). Yum update doesn't work. Also, SO answers for a similar question on CentOS does not ...
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1answer
23 views

How do I boot my computer from a Live-DVD from the terminal?

I'm not an expert on computers in general or Linux in particular, so if I'm vague on something please let me know and I'll try to elaborate. I have an old computer running Red Hat 5.0. It had a ...
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0answers
16 views

Add multiple workgroups in Samba

I am using RHEL 6.5 and I have integrated this server with Active Directory using this guide. As of now, I have configured only one domain in /etc/samba/smb.conf, so that only the users belonging to ...
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1answer
58 views

RedHat init.d script will not start with service after stop

I have the service script below, which calls a shell script. We changed something in the script When I run the shell script directly, everything works fine. When I restart the servER, everything works ...
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1answer
112 views

RHEL 6.6: [Errno 14] PYCURL ERROR 22 - “The requested URL returned error: 403 Forbidden”

First of all, it's the first time I setup RHEL machines, I’m more used to Debian. We're installing many machine at the same time. We've upgraded from RHEL 6.3 to RHEL 6.6 and we're now trying to ...
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1answer
341 views

Why do I have to stop/restart cups in redhat linux in order to use a custom filter?

A colleague wrote a filter utility for me in ruby that allows me to print barcodes from a textfile. (The filter replaces @{blah} with the proper PCL and a barcode checksum character so that "blah" ...
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1answer
163 views

CentOS 7 boots too fast and network is not ready when executing cron scripts

I have just upgraded from CentOS 6.5 to 7.0 and I am not too happy as the new systemd is probably giving me problems. It seems it is just simply booting too fast, starting up processes asynchronously ...
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1answer
88 views

Mounting NFS via systemd in Centos 7

I am trying to mount an NFS share on a CentOS 7 box using systemd. This is my /etc/fstab entry: 10.0.0.104:/export /mnt nfs ...
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2answers
481 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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33 views

Learning differences between Fedora and Redhat [closed]

Background: I have a fairly decent background in linux and am currently using Arch as my primary OS. However, I am going to start working at a new job that requires using and administrating Redhat ...
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2answers
127 views

How to globally configure secure clients using OpenSSL on Oracle Linux 5/RHEL 5?

My workplace recently patched one of our servers to address the POODLE vulnerability. Since then older Oracle Linux 5 clients (based on RHEL 5) can no longer securely connect to the server with any ...
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57 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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1answer
133 views

RHEL 7: mount windows cifs share failed

It may look like it is duplicate question but in context of RHEL 7, it is not. As RHEL 7 does not have mount.cifs binary present in /sbin, I want to know what else can be done to mount windows cifs ...
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35 views

Simulate Initial Login of user without using sudo

I'm writing a script to interface 2 third-party programs. (Datadog and AWS) The data mining script uses sudo -u to run my script. The script that I need to retrieve data from will segfault if ...
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1answer
18 views

talk to modbus device

I currently have a minimal install of Red Hat 6.5 running, on the machine I need to talk to a modbus device. I am wondering what tools and drivers are needed on a linux machine to talk to a modbus ...
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2answers
13k views

Effect of entries in /etc/securetty

By default on RHEL 5.5 I have [deuberger@saleen trunk]$ sudo cat /etc/securetty console vc/1 vc/2 vc/3 vc/4 vc/5 vc/6 vc/7 vc/8 vc/9 vc/10 vc/11 tty1 tty2 tty3 tty4 tty5 tty6 tty7 tty8 tty9 tty10 ...
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2answers
22k views

Setup static IP in redhat 6

I installed Redhat 6 x86_64. I am using the Network connection screen to set a static IP address like below (I want two PC's in my house to see each other: one Redhat PC and one Mac) 192.168.0.5 ...
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2answers
10k views

Why SSH takes a long time to Connect

I have noticed that some Linux Servers in Network takes long time to connect using ssh. Situations: There are two situations I have faced: On some servers some times it takes a long time to ask ...
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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
102 views

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 ...
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124 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
32 views

Sudo requiring password

On a RHEL server I would like to let a user run a command as root without a password: # uname -a Linux foo.com 2.6.32-220.38.1.el6.x86_64 #1 SMP Wed May 15 08:34:56 EDT 2013 x86_64 x86_64 x86_64 ...
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1answer
498 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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1answer
30 views

Why are --older-than and --younger-than killall options missing in RHEL/CentOS?

I've experienced this issue in cleaning up scripts written by developer who were writing for Ubuntu systems, as well as ServerFault questions like this. Is there any reason the -o, -y (--older-than ...
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3answers
12k views

How can I get TLSv1.2 support in Apache on RHEL6/CentOS/SL6?

I'd like to have TLSv1.2 support in Apache on my Scientific Linux 6 (RHEL6 rebuild) server. Is there some semi-supported pathway to getting this working? Preferably with minimal custom rebuilding. ...
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2answers
56 views

Start/stop service script like Ubuntu for RedHat

Is there a .sh script that manages starting and stopping the service like Debian/Ubuntu but for Red Hat/Fedora? Looking to place it into the file running some software.
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Generating Email alert for events in system log

How to generate email alert for every critical event logged in system log /var/log/messages. Suppose, for the following log message, I want an email alert to be generated. Oct 24 11:17:42 eforms ...
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1answer
32 views

Software packaging for RedHat similar to Ubuntu

I'm currently helping a professor who is having trouble installing a particular software onto the school's server which runs on Red Hat/Fedora. The professor thinks that the software was packaged for ...
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RAID1 not working on 4K Sector Size

I have created a RAID1 configuration with two internal Fusion-io SSDs. When I formatted the cards to a sector size of 4K, Linux kernel will generate hourly errors stating one of the device has failed. ...
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28 views

KDE-Openbox closes immediately after it opens on Cygwin

I just installed Cygwin a few days ago. Now when I want to explore it, I can't run KDE-Openbox. I haven't tried anything else, except compiling Mplayer which did work. Last time I had Cygwin ...
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4answers
1k views

SFTP server on RHEL6 disconnects on ls

I've followed the steps outlined here to create a chrooted sftp environment. Everything works great EXCEPT for the command ls. When I do an ls, with any of the flags, I get disconnected ...
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1answer
319 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 ...