Dell PowerConnect 6248 - Enable SSH

I enabled the SSH server on a Dell PowerConnect 6248 by running the following commands.

CoreSwitch1>enable

CoreSwitch1#configure

CoreSwitch1(config)#crypto key generate dsa

DSA key generation started, this may take a few minutes................

DSA key generation complete.




CoreSwitch1(config)#crypto key generate rsa

RSA key generation started, this may take a few minutes.....

RSA key generation complete.CoreSwitch1(config)#ip ssh server

DBAN USB Unetbootin Fix

Using Unetbootin to create a bootable usb drive of DBAD fails on boot with the message “Could not find ramdisk image:/ubninit”

To fix this insert the usb drive back into a computer and open up “syslinux.cfg” in a text editor. Find and replace all occurrences “ubninit” with “ISOLINUX.BIN” and do the same with “ubnkern” with “DBAN.BZI”. Make sure that you match the case.

Installing Xen Tools on Ubuntu 10.04

I am running a Citrix Xen Server "Cluster" install. To install the Xen tools on Windows is easy and Linux a little different. Here's how I installed Xentools on my Ubuntu 10.04 virtual machines. This may work on other flavours of Linux (CentOS?) and should work on later versions of Ubuntu.

Login to your server and run:

sudo mount /dev/cdrom1 /media

sudo /media/Linux/install.sh

Dell PowerConnect 6248 - Set Console Password

I set a console password by typing the following. (Replace "pass123" with your password)

console> enable
console# configure
console(config)# aaa authentication login default line
console(config)# aaa authentication enable default line
console(config)# line console
console(config-line)# login authentication default
console(config-line)# enable authentication default
console(config-line)# password pass123
console(config-line)# exit
console(config)# exit

 Do not forget to exit "config mode" and type:

Copy running-config startup-config

Typing "reload" will reboot your switch and you will be prompted to login

CentOS 5 x86_32 (may work for x64) VPS YUM Error

 My CentOS VPS was getting this error.

Traceback (most recent call last):

  File "/usr/bin/yum", line 29, in ?

    yummain.user_main(sys.argv[1:], exit_code=True)

  File "/usr/share/yum-cli/yummain.py", line 309, in user_main

    errcode = main(args)

  File "/usr/share/yum-cli/yummain.py", line 178, in main

    result, resultmsgs = base.doCommands()

  File "/usr/share/yum-cli/cli.py", line 345, in doCommands

    self._getTs(needTsRemove)

  File "/usr/lib/python2.4/site-packages/yum/depsolve.py", line 101, in _getTs

    self._getTsInfo(remove_only)

  File "/usr/lib/python2.4/site-packages/yum/depsolve.py", line 112, in _getTsInfo

    pkgSack = self.pkgSack

  File "/usr/lib/python2.4/site-packages/yum/__init__.py", line 662, in <lambda>

    pkgSack = property(fget=lambda self: self._getSacks(),

  File "/usr/lib/python2.4/site-packages/yum/__init__.py", line 502, in _getSacks

    self.repos.populateSack(which=repos)

  File "/usr/lib/python2.4/site-packages/yum/repos.py", line 232, in populateSack

    self.doSetup()

  File "/usr/lib/python2.4/site-packages/yum/repos.py", line 79, in doSetup

    self.ayum.plugins.run('postreposetup')

  File "/usr/lib/python2.4/site-packages/yum/plugins.py", line 179, in run

    func(conduitcls(self, self.base, conf, **kwargs))

  File "/usr/lib/yum-plugins/fastestmirror.py", line 181, in postreposetup_hook

    all_urls = FastestMirror(all_urls).get_mirrorlist()

  File "/usr/lib/yum-plugins/fastestmirror.py", line 333, in get_mirrorlist

    self._poll_mirrors()

  File "/usr/lib/yum-plugins/fastestmirror.py", line 376, in _poll_mirrors

    pollThread.start()

  File "/usr/lib/python2.4/threading.py", line 416, in start

    _start_new_thread(self.__bootstrap, ())

thread.error: can't start new thread

The first time I fixed this I typed the following into the command line:

rm /dev/urandom
mknod -m 644 /dev/urandom c 1 9

This worked for awhile but unfortunately the error returned so I did this:

Nano  /etc/yum/pluginconf.d/fastestmirror.conf" and set "enable=0"

Since I have edited that file I no longer have the error