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

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Unable To Bridge Two Teamed Interfaces - Advice?

Before the wall of code I'll explain the situation. I'm trying to set up two interfaces to be teamed together, and from that team create a bridge. I've been studying for the RHCE and I believe this ...
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Strange hang while attempting mounting LVM2 in recovery mode

I am running a RHEL 7 vm and I am trying to mount an LVM disk in recovery mode. I can see the disk with fdisk -l. lvscan shows it being active. When I try to mount the disk to the system I see the ...
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40 views

converting teaming to bonding

RHEL 7 contains bond2team tool but it doesn't contains opposite team2bond tool. I need to convert my teaming files to bonding (please don't ask why, this is for testing purposes). This is my teaming ...
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What is the first event/file/log in linux that appears/changes on boot that signalizes network being up?

I have a vSphere farm with virtual machines and python script that handles cloning and managing of those VMs. I also have a machine (RedHat 6) that I clone if I need a new one. It has a script that ...
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98 views

RedHat machine will not boot when video card is removed

I "inherited" RH 6.4 on a computer with an nVidia video card. I took the image and dd'd it to another computer that has the same hardware. By design, the second computer will be headless. This ...
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106 views

Remote Desktop Connection Login Failed, error-problem connecting

I am having a problem remotely logging into my server using remote desktop and XRDP. When attempting to login, I get: Connection Log: -connecting to sesman ip 127.0.0.1 port 3350 -sesman connect ok ...
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150 views

module scsi_wait_scan not found on CentOS kernel-ml causes kernel panic on boot

I am attempting to upgrade from kernel-lt to kernel-ml, following the instructions here, however on boot the console is flooded with module "scsi_wait_scan" not found This leads to a general kernel ...
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70 views

java version not found in redhat

My OS is redhat linux. It's having the default java 1.4.2, but I need java 1.7.45, for that I am trying as follows: /usr/sbin/alternatives --install /usr/bin/java java /u01/java7/bin/java 5 ...
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63 views

LVM issues and questions

I've got a NAS configured with LVM where one of the volumes is giving errors like this: vgscan reading all physical volumes. This may take a while... /dev/ElkhornC7VG1/idisk5: read failed ...
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42 views

NTP authentication failing with opcode 108

I'm trying to get NTP authentication working on a cluster of test servers and a couple clients. I've followed the instructions at ntp.org. To be honest, though, I'm not sure they are entirely clear ...
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63 views

Xauthority problem

User1 has his home directory on NFS that's mounted by machine1 and machine2, both of which are running Redhat 6.4. If I ssh -Y user1@machine1 and run gedit, I get "X11 connection rejected because of ...
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116 views

How to setup reverse FTP in RHEL?

Researched: http://www.thecave.info/export-proxy-username-password-linux/ http://stackoverflow.com/questions/5334110/text-based-ftp-client-settings-behind-a-proxy ...
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64 views

how do i build / apply an selinux policy file, on redhat 7?

I'm trying to install RabbitMQ on Redhat Linux 7 (RHEL7). I followed the instructions on the RabbitMQ site, and it installed fine. However, it won't run because SELinux is preventing Erlang from ...
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25 views

Investigating Active MemInfo

I am seeing high Active usage when I do a cat /proc/meminfo : MemTotal: 65965328 kB MemFree: 51640992 kB Buffers: 1050332 kB Cached: 8516112 kB SwapCached: 0 kB Active: 11512732 kB Inactive: 1878028 ...
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22 views

Extract configuration from linux and emulate in fresh copy of same linux

I have a short project on emulating linux distros. The project involves extracting system-wide configuration i.e packages, services, configuration files of services, users informations from a linux ...
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120 views

Utility to list and modify kernel modules loaded at system startup

How do I list all kernel modules loaded while system startup? Is there a user space utility to list and modify the modules loaded during system startup? I am working on RHEL6 Desktop and RHEL6 ...
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45 views

Can't modify or delete SELinux user

I was playing around with user_u in the targeted policy on RHEL 6.5. I'm logged in as root in the unconfined context, so I have full ability to change anything I want. I've also switched to ...
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78 views

Using a VPN client as a VPN gateway

I would like host 1 to use host 2 as a gateway to the remote host 3. I have scoured the web looking for a solution, but it doesn't seem to work for me. VPN client software is ike (shrewSoft VPN) is ...
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28 views

How to set one job to run at precise time with anacron without losing config at next upgrade?

I want logrotate to run at a precise time daily. Currently it is set to run at some random time using anacron and I don't want to change the randomness factor for all the other jobs. I have ...
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92 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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90 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 ...
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62 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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272 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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203 views

RHEL 6.1 yum hangs on “Updating Red Hat repositories.”

I just registered my RHEL 6.1 system using rhn_register. However, when I try to run any "yum" command, it gets stuck on "Updating Red Hat repositories" and never does anything. BTW I can run this ...
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107 views

How are network and SCSI kernel modules handled differently from other kernel modules?

I used modprobe to load the 8021q.ko module on a server. I expected to have to do this every time the server rebooted until I made it persistent. However, to my surprise, it was loaded automatically ...
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258 views

Yum or Reposync: How can I slowly remove a repository without unintended dependency issues?

I have used reposync to create and maintain local copies of two repositories, remi and remi-test. These are repositories maintained by Remi Collet. On several systems in an internal LAN, I added both ...
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137 views

Get KERN_DEBUG messages into syslog on rhel7/centos7?

I've been trying to get KERN_DEBUG messages logged to a file in centos7, but have had no luck. I can get them just fine from "dmesg," but not /var/log/messages or /var/log/dmesg Here's a MWE kernel ...
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111 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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68 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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243 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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318 views

External VGA monitor port not working on HP Elitebook 2540p running RHEL 6.5

I'm running RHEL 6.5 on an HP EliteBook 2540p. When I connect the external VGA port to a projector or external monitor and press Fn+F3 to switch to the external port, nothing happens. Under System ...
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Installation from USB fails

I have a pretty old Ubuntu 8.04 machine. The machine doesn't have a DVD reader/writer in it. Challenge: Now, the challenge I am facing is to install RHEL6 in this machine. Obstacle 1: I needed to ...
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3k views

Error: iptables: No chain/target/match by that name

I am trying to configure proxy server on RHEL Server 6.5 using Squid and iptables. Below is the command I executed and the error message it displayed: vzlptest01 root [root] > iptables -A INPUT -i ...
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738 views

How do I set my samba share to allow guest users to view all folders and sub folders, including new and old

I currently have a samba share set up on RHEL, that allows any user to write to the root folder. I'm unable to write to the sub folders/files. I have run: chcon -R -t samba_share_t ...
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Can a RHEL 6.4 DS sync with a CentOS 5.4 DS

I have two CentOS 5.4 Directory Servers that sync information on a daily bases. I'm wanting to replace them with two RHEL 6.4 Directory Servers. Before the existing two are decommissioned all four ...
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81 views

Why does vpnc not block the LAN interface?

VPNC allows local LAN access in spite of activating the vpnc on my RedHat Linux machine When we want to activate the Cisco VPN on win machine, once VPN is active then the LAN port isn’t accessible ...
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34 views

(nologin) root and id X re-spawning

Today I faced a strange issue on one of the test server. Server was set to Runlevel 5. But it didnt work and system changed to runlevel 3. It was showing "init: Id "x" respawning too fast: disabled ...
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Packages skipped because of dependency problems:

2.6.32-71.el6.x86_64 RHEL 6 Please see at the end I am getting some issues due to dependency: [root@xilinx Downloads]# yum install --skip-broken glibc* Loaded plugins: refresh-packagekit, ...
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3k views

Kernel panic not syncing : Attempted to kill init

OEL 5.9 (Tikanga) 2.6.18-371.6.1.0.1.el5 On boot I get the following errors: ... exec of init (/sbin/init) failed!!!: No such file of directory Kernel panic - not syncing - Attempted to ...
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164 views

How to disable PAE feature of kernel, after installation?

I am using RHEL 5.3(x86) as a base platform for my development purpose.My machine's spec is as follows: Intel, Core-i3 Processor @ 2.5GHz 4GB RAM Problem is whenever I am attempting to install the ...
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392 views

system boot appears in last but not in /var/log/messages

I am looking after a Red Hat Enterprise Linux 5.4 server. A user sent me a copy of the output from the last command and it shows multiple reboots on different days (there is no visible pattern to the ...
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83 views

SNMPV3 traps are not being captured correctly

I have configured master agent (snmpd.conf/snmptrapd.conf) of SNMPv5.5 on RHEL6.3 server to support SNMPV3 traps, but when I try to generate a snmptrap and capture the trace through tcpdump, I still ...
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184 views

How to get back a lost session in RHEL : Using NoMachine

I logged in remotely to RHEL using NoMachine. Suddenly it got stuck and I have to close the NoMachine client. When I logged in again using NoMachine I can't see the old session (I can't see same ...
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215 views

Permanently enable scl for RHEL6 RedHat

RedHat provides a way to install packages with newer versions of packages than officially supported with Software Collections. After the installation of a software collection it is necessary to enable ...
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285 views

Service httpd is failing to start - fcgid can't create shared memory

I'm not sure why, but when I try to start the httpd service, it will not start. Server config: OS: CentOS 5.10 PHP: 5.5.7 Apache: 2.2.3 I built mod_fcgid from source, put it into the ...
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184 views

Listing previous logins through sftp

Hello people of the stackexchange, I am having a little difficulty trying to find a location of a particular log file which i'm hoping someone on here could help me with. What i am trying to do is ...
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42 views

Send big data with dsmigratedata command

I want send data to remote server using this command but I dont know what is the syntax is that I can use for this command... I'm using the command: $ dsmigratedate -s user@remoteip -p 22 password ...
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229 views

How different is I/O handling of hard disk in AIX and Redhat Linux?

I am running a hadoop I/O workload in redhat linux and have ran that in IBM AIX as well with same underlying hardware, disk and disk configuration. With the default settings on the os redhat linux is ...
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120 views

RHEL6 LDAP client not listing all the groups

Using sssd I have a RHEL6 client configured to login using LDAPS. The login works, but if the user logged in is assigned to more than 1 group at the LDAP level, groups only returns 1 group? Could I ...
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3k views

Undefined reference to gzopen64 when building samtools

I am trying to install the software package samtools0.1.19. When I run make, I get errors: gcc -g -Wall -O2 -o samtools bam_tview.o bam_plcmd.o sam_view.o bam_rmdup.o bam_rmdupse.o bam_mate.o ...