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UCBRHEL

Red Hat OS Specific Issues

Resources

• RHEL as a Microsoft VM
• Hudson - including instructions on how to set up apache. We use iptables for the firewall, see http://www.terraswarm.org/swarmos/wiki/Main/TerraAndTerraTest
• Terra And TerraTest

Obtaining Red Hat

At UCB, http://software.berkeley.edu, has a "Software" link, then under "Operating Systems" is http://software.berkeley.edu/operating-systems#RedHat, which as a "Downloads" link https://ucbrhn.berkeley.edu/iso/ which has https://ucbrhn.berkeley.edu/iso/UC-RHN-FAQ-v6.pdf

Searching the web for "UC Berkeley Red Hat Enterprise Linux License Service - FAQ" yields https://kb.berkeley.edu/ist/page.php?id=24796, which is more up to date than https://ucbrhn.berkeley.edu/iso/UC-RHN-FAQ-v6.pdf

1. Go to https://ucbrhn.berkeley.edu/iso/, login with your Calnet ID and download the appropriate image. I downloaded https://ucbrhn.berkeley.edu/iso/rhel-server-6.1-x86_64-dvd.iso
2. Email your name, your login and your status (Staff/Student/Faculty) to the address listed in the FAQ above. Don't forget to have the Optional Channel enabled.
3. Once Red Hat is running use the key provided:
   /usr/sbin/rhnreg_ks --force --activationkey PLACEKEYHERE \
   --serverUrl https://ucbrhn.berkeley.edu/XMLRPC \
   --sslCACert /etc/pki/tls/certs/ca-bundle.crt
   

   [$[Get Code]]

Optional Channel

The Red Hat Network (RHN) has a number of channels. The Server Optional channel is well, um, optional. When you request a key, ask that the Server Optional channel be enabled. If the Server Optional channel is added after your initial installation, run yum makecache

To install PhpMyAdmin requires the Optional channel, see: https://www.linuxquestions.org/questions/red-hat-31/rhel6-no-php-mcrypt-support-846251/

There was a thread about this: http://micronet-at-uc-berkeley.840177.n3.nabble.com/Micronet-php-devel-on-redhat-linux-tp4025779p4025785.html

SSH

I could not log in using my id_rsa and id_rsa.pub keys. I opened up port 666 on the firewall by (as root) running system-config-firewall and then ran /usr/sbin/sshd -d -p 666 as root.

On the non-rhel client, I ran ssh -v sisyphus -p 666 date and the connection worked!

<Looking at a diff of the output from ssh -v sisyphus -p 22 date, I could see:

So, with port 22, ssh-rsa is not enabled?

Also, ssh-keygen was failing?>

The fix was to do:

Problem: There was an error parsing the RHN proxy settings, RHN Satellite or RHN Classic support will be disabled.

See https://www.linuxquestions.org/questions/linux-newbie-8/rhn-satellite-or-rhn-classic-support-will-be-disabled-882847/ which suggested editing /etc/sysconfig/rhn/up2date. I ended up changing:

to

yum update fails with "Server denied you to change to the given directory" on ftp.redhat.com

yum update failed with:

My solution was

Other packages to install

Installing Xvfb

Xfvb is a virtual frame buffer that we use as part of the nightly build.

http://serverfault.com/questions/344793/install-xvfb-via-yum-yum-repository-for-xvfb says:

Unfortunately, at the time, I did not know how to request the Optional Channel, so I did the below steps:

So, my workaround was to install the Centos 6.2 package at http://rpmfind.net/linux/RPM/centos/updates/6.2/x86_64/Packages/xorg-x11-server-Xvfb-1.10.4-6.el6.centos.3.x86_64.html

Here's what's in it.

Resizing a partition

I want to split the /home partition and keep it ext4. I have:

Getting system-config-lvm to run

https://access.redhat.com/knowledge/docs/en-US/Red_Hat_Enterprise_Linux/6/html/Storage_Administration_Guide/ch-lvm.html suggests system-config-lvm. To get this to work I had to install various xorg-x11 packages including yum install xorg-x11-xauth.

Enable process accounting

Problems with yum update

Package does not match intended download

yum failed with:

My workaround was to do

Note that this dependency was probably from: php-mb, the yum command included:

Setup NSF

http://cassjohnston.wordpress.com/2011/12/22/rhel-6-as-nfs-client/

Check that the mount works:

If mount does not work, email help@eecs and ask that the machine be added to the netgroup for that partition. I typically run showmount and email the results:

Create /etc/auto.projects

Restart the automounter:

Problem installing the bash patch

On Sisyphus and moog, the problem was that yum update bash was not working because I was getting the beta channel.

yum info bash was returning

Note that the version is after the version bash-4.1.2-15.el6_5.2 listed at https://access.redhat.com/solutions/1207723.

yum-config-manager --disable rhel-x86_64-server-6-beta was failing:

https://bugzilla.redhat.com/show_bug.cgi?format=multiple&id=982241 suggested editing /etc/yum/pluginconf.d/rhnplugin.conf:

Then, this worked:

Setting the time

• [https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Deployment_Guide/sect-Date_and_Time_Configuration- Command_Line_Configuration-Network_Time_Protocol.html | 2.2.2. Network Time Protocol Setup]]

To set the clock, look at the end of /etc/ntp.conf

Below we use the -q flag to query the server to verify that it is on, then call ntpdate to use the two servers, then enable the ntpdate daemon across reboots.

Building gcc-4.8.4

12/2014 - terra

As root:

   yum install gmp-devel.x86_64
   yum install mpfr-devel.x86_64
   yum install libmpc-devel.x86_64

As a fix for "/usr/include/gnu/stubs.h:7:27: fatal error: gnu/stubs-32.h: No such file or directory":

   yum install glibc-devel.i686

Not as root:

   wget http://www.netgull.com/gcc/releases/gcc-4.8.4/gcc-4.8.4.tar.gz
   tar -zxf gcc-4.8.4.tar.gz
   cd gcc-4.8.4
   mkdir build
   cd build
   ../configure --prefix=/usr/local/gcc-4.8.4.tar.gz