Red Hat Enterprise Linux version 6 is a Linux distribution sold by Red Hat, Inc. for the enterprise market. It is used for both servers and desktops. Although the binaries are not freely available, the sources are, and so there are numerous projects which provide compatible rebuilds of RHEL, such as CentOS and Scientific Linux.
Questions tagged [rhel6]
516 questions
152
votes
9 answers
What version of RHEL am I using?
From the shell and without root privileges, how can I determine what Red Hat Enterprise Linux version I'm running?
Ideally, I'd like to get both the major and minor release version, for example RHEL 4.0 or RHEL 5.1, etc.
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Arthur Ulfeldt
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103
votes
2 answers
IPTABLES - Limit rate of a specific incoming IP
I do not wish to limit the rate of a specific service. My goals is to limit rate based solely on the incoming IP address. For example using a pseudo-rule:
john.domain.local (192.168.1.100) can only download from our httpd/ftp servers at "10KB/s"…
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James
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83
votes
3 answers
Human readable format for http headers with tcpdump
I would like to view the HTTP headers sent from Apache (listening on port 80) to Tomcat (on port 4080) in a Linux machine.
According to Wikipedia,
Header fields are colon-separated name-value pairs in clear-text string format.
I've tried some…
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Adam Matan
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29
votes
4 answers
Do I need a RHEL subscription to install packages?
I'm new to RHEL. Trying to install software this morning and running into road blocks. Is it required to have a subscription to download packages via yum on RHEL?
I'm coming across different sources on the net, some make it sound like yes, you need…
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quickshiftin
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28
votes
9 answers
How do I use Linux to find unused IP addresses on my network?
I've got access to two computers (A and B) on a network. Both have got a static IP address with a subnet mask of 255.255.255.128 (I checked that a DHCP server was not being used). I want to configure multiple IP addresses to the same machine and…
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Vishal Sharma
- 391
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- 8
28
votes
3 answers
How to install jq on RHEL6.5
There's seems to ready yum package.
So I've downloaded the tarball, but as soon as I ran autoreconf -i , I got the following:
configure.ac:14: warning: macro `AM_PROG_AR' not found in library
configure.ac:10: error: Autoconf version 2.64 or higher…
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Amit Dunsky
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- 10
27
votes
2 answers
How do I make a persistent domain with virsh?
virsh create somefile.xml creates my machine just fine but when I shut the machine down the whole thing disappears. Machines I made with the virt-manager GUI are persistent (stick around after shutdown) and the xml file is derived from those…
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colechristensen
- 602
- 1
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- 14
17
votes
3 answers
How to free up space on RHEL6 /boot safely?
I am trying to do yum update on RHEL 6 box and I am getting this error message
Transaction Check Error:
installing package kernel-2.6.32-279.9.1.el6.x86_64 needs 10MB on the /boot filesystem
installing package grub-1:0.97-77.el6.x86_64 needs…
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ams
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15
votes
3 answers
What is the relation between NetworkManager and network service in Fedora/RHEL/Centos?
Hi I am new to Fedora/Centos/RHEL. I am confused about NetworkManager and network service in these Linux OS. May I know what is the relation between NetworkManager and network service?
If I am using NetworkManager, do i need to turn off network…
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userpal
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- 3
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- 17
14
votes
2 answers
HP DL380p Gen8 (p420i controller) I/O oddity on XFS partitions
On DL380p gen8 servers using XFS on top of LVM on top of raid 1+0 with 6 disks, an identical workload results in a ten-fold increase in disk writes on RHEL 6 compared to RHEL 5, making applications unusable.
Note that I'm not looking at optimizing…
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Dennis Kaarsemaker
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- 69
14
votes
2 answers
Upgrade CentOS 5.x to CentOS 6.x - tips and techniques
Now that CentOS 6.0 is making its way to the various mirror sites, I wanted to solicit opinions on the upgrade process. In working with the commercial RedHat 5.6 and 6.x distributions for the past few months, I've been relying on a fresh install…
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ewwhite
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- 799
13
votes
2 answers
Persist IP address alias across reboots in CentOS/RHEL 6 using "ip" command
I've always used the ifcfg-eth0:1 alias files to create additional addresses. However, in recent rhel documentation, it states that:
As the ip command of the iproute package now supports assigning multiple address to the same interface it is no…
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prl77
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12
votes
2 answers
SSSD rejects LDAP login with su: incorrect password
I've set up an LDAP server with user accounts. I've successfully configured a Rails application to authenticate against this LDAP server. I'm now trying to configure SSSD to authenticate against LDAP, but it doesn't like the individual user…
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Leo
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12
votes
2 answers
Why is Linux kdump not writing to /var/crash?
It's happened again! I have 4 servers which are crashing periodically, and there is no information printed to the system logs or the serial console.
In addition, the Linux kdump service isn't writing core dumps to the default location of…
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Stefan Lasiewski
- 22,949
- 38
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- 184
12
votes
4 answers
SSH hangs after authentication
When logging in to one of my servers over ssh, it just hangs after authentication. This is the output on the client with -v.
OpenSSH_4.3p2, OpenSSL 0.9.8e-fips-rhel5 01 Jul 2008
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying…
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andrewrjones
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