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

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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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3 views

How can the RES memory reported for a Java process be higher than the VIRT memory?

I've been monitoring a Java process (Oracle Weblogic) using TOP and have observed that sometimes the following will happen: RES will increase from it's usual stable level of 2,097,152 KB up to ...
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11 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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1answer
93 views

GHOST: glibc gethostbyname buffer overflow

https://rhn.redhat.com/errata/RHSA-2015-0092.html I can see md5sums of the packages, but cannot download them and my package manager says I'm up-to-date. [root@notebook log]# grep glibc-2 yum.log | ...
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5 views

Does dm-multipath schedule I/O?

I have a multipath device I'm interested in: [root@xxx dm-7]# multipath -ll mpathf mpathf (3600601609f013300227e5b5b3790e411) dm-7 DGC,VRAID size=3.0T features='1 queue_if_no_path' hwhandler='1 alua' ...
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1answer
23 views

Building a Read-Only Linux System With a Writable Layer in RAM

I have a requirement to boot RHEL 6.6/7.0 into read-only mode with a writable layer only in RAM. I believe this is similar to how live CDs work, in that the file system is read-only, but certain parts ...
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9 views

Finding problem with compact flash filesystem

I have a single board RHEL 5.8 computer that runs from a 4GB compact flash card instead of a HDD. This had been running for several weeks, with an application started and stopped for testing and being ...
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20 views

How to merge different partitions on RedHat

I am quite in a bad situation that my oracle instance is on a mount point (/disk1) which is about to get full. /disk1 is mounted to /dev/sdb1 (primary partition on /dev/sdb) to resize the partition I ...
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0answers
13 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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25 views

Linux System administrator [duplicate]

i have 10 users other than Root. Now i want to give permissions to user no. 5 that this user could access all other users like root. How it will be possible in RHEL 6.0?
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30 views

How to use both syn proxy and connlimit rules with iptables?

I want to write both syn proxy and connlimit rules. I want to send packets to syn proxy first because of performance issue. Here is rule sample. I use bridge interfaces but I dont think it is ...
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14 views

I can no longer define a shortcut using <ctrl> in gnome-keybinding-properties

This seems very similar to the bug described in here I'm using scientific Linux 6.4, and have gconf editor 2.28. It had been working great, up until some time ago (I don't know when), i tried ...
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0answers
20 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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9 views

how to tell chrony to syncrhonize time with specific server periodically

In Windows, somewhere in settings, I can check "Synchronize with Internet time server" checkbox, add ip-address (say 10.20.30.40) and that's it. How can I do something similar with chrony? I've ...
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2answers
36 views

Should I move a binary used by a non-root user from /usr/bin/ to /usr/local/bin/?

I have gone through a related thread here. A colleague of mine has copied the phantomjs binary to /usr/bin. In our system, this binary will be used only by a non-root user. At the moment, the regular ...
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1answer
26 views

Installing vlc on rhel6

As my first step downloaded vlc-2.1.5.tar.xz. after extracting ran "./configure" there comes this monster "configure: error: Could not find lua. Lua is needed for some interfaces (rc, telnet, http) ...
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50 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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43 views

Device already mounted on resource is busy

Issue ::: I install Redhat 5.10 x64 on server which had faulty hdd . I removed the old faulty hdd and installed new one with 500GB capacity and after installation i need to copy some data from old ...
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14 views

How to set a service to start after autofs has started with systemd

I have to set up a license server on a RHEL7 machine with systemd. The license server should start upon boot and load a license file from a shared disk on the network. So I need to wait for the ...
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0answers
25 views

Mediawiki error: File upload not working

I've installed Mediawiki v1.24.1 on my server which is running RHEL7. I've installed it under /var/www/foohelp/wiki. However, when I try to upload a file, I get the following error: [f3eae72a] ...
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1answer
41 views

RHEL openssl conflicts

I am stuck installing PHP 5.5 (to support wordpress) on RHEL 6.3 (Santiago), I think the server was not set up correctly (contractor) and I have ended up with a copy openssl from ius as opposed to ...
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13 views

Gemalto Cyberflex Access 64k smartcard not being recognized by CoolKey on RHEL?

Since I'm new to smartcard integration, I'm not even sure if Coolkey is the problem, but that is the PKCS #11 module that I am using. I'm running RHEL 6.6 with these modules: ...
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0answers
16 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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1answer
13 views

Accessing system after GNOME failed

I have difficulties to access GNOME in Scientific Linux 6.5 I did try to set automatic login following wiki.archlinux. In /etc/gdm/custom.conf I added: [daemon] AutomaticLogin=username ...
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1answer
22 views

Installing RPM packages with circular dependency

I'm trying to follow an article to enable smart card login on my RHEL 6.6 desktop. When I attempt to install coolkey-1.1.0, it says ccid and pcsc-lite is needed. When attempt to install ...
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1answer
101 views

RHEL 7 (CentOS 7) security / ssh / sshd_config advise requested

I am not a sysadmin and try to create a more or less secure web server (LAMP based CentOS 7). I read several tutorials about setup an initial CentOS 7 droplet and got everything running fine. ...
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1answer
14 views

Deleting text selection in VNC cuts it instead of deleting it

I have a VNC session running and I'd like to share the clipboard between the two systems bidirectionally. The operation that's failing is where I take a URL from my desktop's web browser, go to my vnc ...
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34 views

How to increase /dev/sda2 partition in rhel6?

I have 2 partitions, filesystem is ext4. One is /dev/sda1 mounted with /images. Another one is /dev/sda2 mounted with /videos. /dev/sda2 is 99% full, I need to increase this without using lvm. I ...
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19 views

Howto create debuginfo package for sub-package defined in spec file on RedHat?

For example. zabbix.spec has subpackage zabbix-server-mysql, but rpm -ba only create zabbix-debuginfo. How to create zabbix-server-mysql-debuginfo? I found a ...
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1answer
35 views

Is there a correlation between CentOS and RHEL versions?

I am trying to install an HP NC364T (4 port ethernet adapter) onto a machine running CentOS 7, however HP only supplies drivers built for RedHat, SCO, SUSE, Sun and Solaris. I know CentOS is intended ...
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37 views

linux + cant installed the package GNOME Desktop Environment on linux red-hat

I have been installed the package GNOME Desktop Environment on my red-hat machine version 6.4 in the end of the installation I get the error about missing RPM- GPG-KEY-oracle directory !!! ...
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2answers
47 views

Installing MySQL on CentOS throws error that cannot find mysqld.sock

I have yum install mysql in CentOS 6.4. Now, when I use mysql command, it throws the following error: ERROR 2002 (HY000): Can't connect to local MySQL server through socket ...
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21 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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17 views

Linux Apache VM Port Issue

I have a RHEL VirtualBox VM in bridged mode so it can be accessed from the LAN. RHEL hosts an HTTPD server configured to listen on ports 80, 8080 and 8181. netstat -an | grep :8 confirms that port 80, ...
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3answers
46 views

How can I determine if an NFS remote is exporting a directory?

In my script, I have several layers of statusing: remote is available (ping) remote NFS service is active remote NFS is exporting a certain directory remote NFS is mounted (mount) For (2) and (3), ...
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1answer
23 views

/usr/lib/python2.4/site-packages/cElementTree.so: wrong ELF class: ELFCLASS32

yum update There was a problem importing one of the Python modules required to run yum. The error leading to this problem was: /usr/lib/python2.4/site-packages/cElementTree.so: wrong ELF class: ...
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38 views

Yum can't download, but curl is fine?

I'm creating a local copy of rpmforge on a RHEL5 host. # reposync --repoid=rpmforge --download_path=/var/www/html/yum # cd /var/www/html/yum/rpmforge; createrepo --database . I have a repository ...
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18 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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1answer
50 views

Problem running “selinux sandbox” with java

I am trying to sandbox a java application using selinux sandbox. System details: Redhat 6 | x86_64 | no x server install | jdk7 from oracle tar.gz version | cgred and cgconfig are stop The cmd ...
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1answer
39 views

Rhel 7 not booting up

I recently installed rhel 7 on my laptop as dual boot (with windows 8.1) in UEFI mode. After the installation I cannot log into redhat. The gnome desktop starts to load and then it goes to a black ...
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68 views

How can I reset an unknown root password if a file system check interrupts the startup sequence?

This morning I was helping a fellow admin with a crash that occurred on a CentOS 5.8 VM. Earlier in the day, the underlying SAN hosting various VMs experienced an issue and ultimately caused some ...
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0answers
31 views

Input is disappearing in emacs

I am currently running the latest version of emacs on RHEL 6.6. The issues I am having is that sometimes when I type input, some of the input randomly disappears and will then reappear when I ...
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1answer
57 views

tar command not found on rhel6

I am trying to download a file in rhel6 and use tar to uncompress it. I am running this on docker. I get a wierd error saying : /bin/sh: tar: command not found 2014/12/22 19:32:21 The command ...
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1answer
39 views

`yumdownloader --source` can't find srpm on rhel 6.5

yumdownloader --source prints either No Match for argument or No source RPM found. Switching "Enabled" "1" or "0" has no effect. [vboxuser@okdemohost ~]$ yumdownloader --source gcc Loaded plugins: ...
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34 views

Unable to trap “CTRL+C” within kickstart “%pre” bash script

I'm using an interactive pre-installation bash script in a CentOS-7 kickstart image. I was trying to use "trap" to catch user Ctrl+C (SIGINT) and run some code as follows: trap_ctrl_c() { #Some ...
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0answers
16 views

Installing xcache-admin after easyapache configuration(issues) RHEL6

I configured my server with easyapache with setups up XCACHE for me. The issue is it doesnt include xcache admin and I need that to use our platform. When I try and YUM the package from EPEL, It tells ...
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4answers
72 views

Cannot use “firefox” command to run latest firefox

I have download firefox version 34 from Mozilla website. Next, I extracted the tar archive, and moved it to the Desktop. Now, when I run the following command: Desktop/firefox/firefox the version ...
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2answers
40 views

dhcp without dns: ping `hostname` not working. Auto add hostname to /etc/hosts?

On RHEL 6.5 how to make my own hostname locally resolvable, if my ip address is dynamic and not registered in DNS? I know, it's possible to add dhcp hook scripts. Is there a similar way to hook the ...
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1answer
241 views

Dropbox doesn't work on scientific linux

Installed dropbox on scientific linux (command line only) several months ago and it has been working fine. I installed it for one user, and I control it using the CLI dropbox.py. Recently I ...
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46 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 ...