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

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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
2k 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 ...
2
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1answer
72 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 ...
2
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1answer
455 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 ...
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1answer
182 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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0answers
96 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 ...
3
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1answer
8k 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 ...
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0answers
1k 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 ...
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1answer
205 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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48 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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1answer
2k 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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1answer
93 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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1answer
85 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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0answers
87 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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2answers
394 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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1answer
356 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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3answers
70 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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79 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 ...
3
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1answer
54 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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1answer
698 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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0answers
78 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

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 ...
2
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1answer
2k 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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1answer
3k 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
249 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
3k 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 ...
2
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1answer
136 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
120 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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1answer
145 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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2answers
849 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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1answer
42 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
19k 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
198 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.
3
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2answers
725 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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0answers
80 views

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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0answers
23 views

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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1answer
42 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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1answer
151 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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2answers
533 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 ...
0
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1answer
78 views

After added SLC6-OS repo to RHEL6, should I let it update 1200+ packages (400M)

I have RHEL6.4, and have added several repos to it to try and add some common tools, gcc for example. It was recommended I add SLC6-OS and use that for installing tools like gcc, but when I do: ...
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0answers
18 views

What means “removing packages from package profile” in up2date in RHEL?

What does "... removing packages from package profile: ['package1', 'package2']" mean in RHEL, in the /var/log/up2date log? I thought it was dependencies, but the software is still present.
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Shell script to monitor log files going over a certain size [duplicate]

Due to another issue I'm tracking down, one of my app servers occasionally starts generating a large amount of errors and then becomes unresponsive. For now, the simple solution is to restart the ...
5
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2answers
3k views

What is the purpose of avahi on a RHEL 7 server?

Running a server machine with CentOS 7, I've noticed that the avahi service is running by default. I am kind of wondering what the purpose of it is. One thing it seems to do (in my environment) is ...
2
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2answers
890 views

Can't install any packages on RHEL because of dependancies

Trying to install packages, and keep getting dependency errors. Already installed EPEL, IUS, REMI repos. Example: yum install gcc and I get Error: Package: ...
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1answer
483 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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2answers
54 views

messed up repos in RHEL6

I have RHEL 6 and have installed a bunch of the common repos (epel, etc) and somehow screwed up the repos (I think with a repo clean command) I was getting errors specifically with EPEL, so I removed ...
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1answer
61 views

Latest libxml2 port to RHEL4

I am currently installing ModSecurity on our development servers and the problem that I am running into with the latest version is that we are utilizing RHEL 4 on our servers. They have no intention ...
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0answers
740 views

Rebuilding the Linux yum repository metadata

On a RH 6.5, running yum update I get : "This system is receiving updates from RHN Classic or RHN Satellite. Setting up Upgrade Process Error: Cannot retrieve repository metadata (repomd.xml) ...
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0answers
327 views

Using autofs to mount a NFS share

I am trying to setup a RHEL 7 machine with an autofs NFS mount (the NFS mount is a Windows 2012 R2 server running Services for NFS). Here are the contents of /etc/auto.master: /nfs /etc/auto.nfs ...
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1answer
4k views

How to make NIC team come up on boot in RHEL 7

To configure networking on RHEL 7, I created a JSON file for teaming, then ran these commands: ip link set down eno1 ip link set down eno2 ip link set down eno3 ip link set down eno4 teamd -g -f ...