Need a strong, but easy to remember password? No need to remember, generate it! Up to 48 chars, works on any unix-like system:


read -s pass; echo $pass | md5sum | base64 | cut -c -16


Joe -

========================================

MD5SUM creates a 128 bit hash.

Base64 turns a binary number into ASCII

cut – simply removes sections for each line.

Output looks like:

n@H:~$ read -s pass; echo $pass | md5sum | base64 | cut -c -16
(I entered: abcdefg)
MDIwODYxYzhjM2Zl

I have been fighting video problems with Debian for a couple of weeks. I corrected the /etc/X11/xorg.conf file here.

If it looks familiar it should! This is the /etc/X11/xorg.conf file from the 64 bit Ubuntu 10.10 Livecd. I put it onto a usb flash drive, used sneaker net (which means I pulled it out of one machine, walked over, and put it into another), and copied it over. Restarted the gdm3 on 64 bit Debian Squeeze. I have full use of the hardware graphics capability and monitor sizes.

Using Ubuntu to fix Debian. Oh! I so love irony.

Thanks Joe for this crazy idea. But it worked!

Wayno

Let’s face it. Debian != Ubuntu. It can be difficult to configure. But this DVD may help!

BOTH 32 and 64 BIT SYSTEMS on the DVD (under $5)

The main advantages to this DVD over this free ones you can at the Debian Site are:

1. Comes with the non-free software already on the dvd.

2. Comes with drivers you’d have to hunt up, like the atheros wireless driver.

Order it here

Thanks Joe!

Wayno

How to convert from Ubuntu to Debian

This article will encompass a LOT of previous posts. This is NOT recommended for n00bs.

1. While you are downloading the Debian iso, it would be a good first step to backup /home/ and /etc/.

2. You can find simple rsync backup/restore scripts here.

3. Once the debian iso is downloaded, you should md5sum check it first. You can find the debian cd iso image checksums here.

4. Burn the iso (not copy to a cd – why this is NOT for n00bs) to a cd or dvd, depending on what you downloaded.

5. Installing from the DVD is quite different then Ubuntu. This is NOT a live cd, so you can’t experiment first.

The rest of this article will ass/u/me that you were able to install Debian sucessfully. Configuring Debian, requires some work!

1. The first thing that bit me in the buttocks (can we say that here?) – is rebranded software. You won’t find Firefox or Thunderbird. Instead you will find re-branded software. So icedove instead of Thunderbird, and IceWeasel instead of Firefox. Those are in the Debian Repositories. The problem with re-branded software, is that it is NOT upstream compatible. You can always choose to install the branded stuff (Firefox/Thunderbird) from the Mozilla site.

NOTE: the following code block assumes sudo (#3 below is fixed:)

As always anything with an octothorpe (#) is a comment and need not be coded.


sudo apt-get install icedove # get the re-branded thunderbird
sudo apt-get install iceweasel # get the re-branded firefox


2. The second thing is .profile so you will want to deal with that next.

3. Next, was how to easily do sudo in debian

By default – sudo does NOT work in Debian. And as you know, you get sort of used to using sudo in Ubuntu. There are some crazy ideas on how to fix this, but this is pretty easy and straight forward.

4. You probably need java run time

Guess what? That does NOT come pre-installed on Debian! You can easily add the java runtime environment (jre) for Debian.

5. if you need to restart the gdm in Debian, it’s gdm3 NOT gdm as in Ubuntu. So


sudo service gdm3 restart


6. By default, /usr/sbin is NOT in your path in Debian, but is in Ubuntu. How to fix? This was a little more complicated then I thought. But Joe had a neat fix! (so none of the system tasks are available – things like I dunno gparted, vsftpd, useradd, etc — are not accessible.)

By default, when Linux comes up, it executes /etc/profile. Within /etc/profile it sources /etc/profile.d/bashrc.local.sh

What do I mean by “sources?” Joe explains:

Executing a script is the normal way to do it. The script executes, then it exits, and it’s environment is gone forever.

When you source a script, you execute all the commands in the script and (it) remain(s) in the environment – keeping all changes made to same.

execute: /path/to/script.sh

source: source /path/to/script or more succinctly:

. /path/to/script

And that is what the following script does/ It uses a function called pathmunge to add the missing paths:


# /etc/bashrc.local.sh for Linux
#
# Local environment variables
#
export ORGANIZATION="Mirai Consulting"

#fi


7. If you have Skype you will probably need to fix that as well.

This is just a first cut draft on the differences I noted between Ubuntu and Debian.

Thanks always to Joe and Loni.

This requires an intermediate skill level.

Installing unstable software, can cause your system to crash. This is NOT recommended for n00bs. The how to add the ppa’s are contained in the link below. But again, if you don’t know what this is: DON’T DO THIS, unless you are sure.

PPA for Firefox / Thunderbird Versions 5/6/7/8

Version 3.X of Firefox kills my Ubuntu 10.10 (AMD 64) System. But version 6 and beyond run fine.

This is what Thunderbird V 5 looks like:

Thanks again, Joe.

Wayno

And so I asked Loni:

is there a way to look at motherboard/cpu temps via an ssh connection?

She said sure!


sudo apt-get install lm-sensors
sudo sensors-detect
sensors


And you will get output that looks something like:

it really was that easy -

Adapter: SMBus I801 adapter at 3000
in0: +1.26 V (min = +0.00 V, max = +3.32 V)
Vcore: +1.14 V (min = +0.00 V, max = +2.99 V)
+3.3V: +3.33 V (min = +0.00 V, max = +4.38 V)
+5V: +5.10 V (min = +0.00 V, max = +6.64 V)
+12V: +12.06 V (min = +0.00 V, max = +15.94 V)
fan1: 2132 RPM (min = 0 RPM)
fan2: 0 RPM (min = 0 RPM)
fan3: 0 RPM (min = 0 RPM)
fan4: 657 RPM (min = 0 RPM)
temp1: +60.0°C (low = -127.0°C, high = +127.0°C)
M/B Temp: +41.0°C (low = -127.0°C, high = +127.0°C)
temp3: +48.0°C (low = -127.0°C, high = +127.0°C)
cpu0_vid: +0.000 V

Joe

for me I got:

sensors
acpitz-virtual-0
Adapter: Virtual device
temp1: +50.0°C (crit = +75.0°C)

k8temp-pci-00c3
Adapter: PCI adapter
Core0 Temp: +75.0°C
Core0 Temp: +72.0°C
Core1 Temp: +74.0°C
Core1 Temp: +73.0°C

(Yes I do have a dual core 64 bit AMD System)

Ahh as always. YMMV (your mileage may vary) applies!

Thanks Loni and Joe

Yup supposed to be 110F/43C here later this week!

Wayno

When i started this site over 3 years ago, I felt a little bit like Forrest Gump: Linux is like a box of chocolates. You never know what you’re going to get!

Little did I know when I started down this journey over 6 years ago, this is where I’d be.

I didn’t get here alone.

I need to thank several people.

First is Joe S. who patiently mentored and continues to mentor. He has entertained dozens of crazy things I have done. What I discovered is: there is more then one right solution in Linux.

Second is Loni. She always makes me do my homework first, but when I get stuck, is there to steer me in the right direction. She also is responsible for naming the site, pkill-9.

These two continue to serve as guides along this trek.

I also need to mention Brian L. (WB6RQN) whom I met at SDSU nearly 40 years ago. Unlike Al Gore, Brian really did help shape and guide the Internet into what it is today. Thank you for answering a lot of technical questions, and also helping me upgrade my amateur radio ticket.

Matt, who patiently tested a lot things for me, and help answer security questions. Matt is my oldest net friend.

Jeremy. Who hosts Pkill-9. We have taught each other many things over the course of the last few years.

Darren K, from Hak5 who inspires and encourages me.

Will. For the cheesy goodness you bring into my life, and for your friendship.

My parents. Who in their 80′s let me switch them from Windows to Linux. Proving that you’re never to old to learn something new.

José, Jason, Colin, and countless others I have helped down their own path.

To my best friend Brad B. While Linux is over his head, I wouldn’t be here without his support.

And finally the Kittiehs:

This site is my way of returning to each of you, a hearty thanks and a legacy.

and so it goes….

Wayno
KA5FVE

I am asked frequently: How can I make my own ftp server?

FTP — or file transfer protocol, was one of the original protocols used in the development of the Internet. It allows us to transfer files between a server machine (host) and a client. With the advent of peer-to-peer Bit Torrent it might seem that ftp has fallen by the wayside. Bit torrent is great, if you have a lot of the same information to share. Movies or music. But if you have only a few files to share amongst a small group of people, ftp is the way to go.

It’s not hard to implement, but there are a couple of tricks. This post will seem quite lengthy, because there’s a lot of concepts that we need to bring into focus. Security of course.

Here’s the setup. I want to use an account on my computer, that is just for sharing files with other people. Rather then have an account that only one local user can see, I need to have it visible to all local users, and to the ftp server.

So I stuck everything I wanted to share in /home/misc/example.

As always anything and including the octothorpe (#) is a comment, and need NOT be coded!

1. The first thing we will want to do is, get the software!


sudo apt-get install vsftpd # install the very secure ftp daemon


2. Let’s backup /etc/vsftpd.conf before we begin.


cd /etc # got to the /etc directory
sudo cp vsftpd.conf vsftpd.conf.bkp # make a backup copy


Here are snippets from /etc/vsftpd.conf. Use your favourite editor to change /etc/vsftpd.conf


# Anonymus FTP user Settings
#
# Allow anonymous FTP?
#
anonymous_enable=NO
#
chroot_local_user=NO
#
# You may specify an explicit list of local users to chroot() to their home
# directory. If chroot_local_user is YES, then this list becomes a list of
# users to NOT chroot().
#
chroot_list_enable=YES
#
# (default follows)
#
chroot_list_file=/etc/vsftpd.chroot_list


3. Now we edit /etc/vsftpd.chroot_list and add the userid to be jailed:
(mrtestftp is the user I am using. Change it to whatever you decide.


mrtestftp


4. We’re done changing, so restart the vsftpd daemon to re-read all the changes.


sudo service vsftpd restart


if this is the first time running this, you may need start instead of restart.

5. Let’s make sure everything worked. Take a look at the system log file with:


dmseg


and let’s look at the vsftp log:


sudo tail -25 /var/log/vsftpd.log | more


you may have never seen the tail command. This says look at the last n lines (25) and pipe the output (take the output of one programme, and make it the input to the next programme) to more. More allows us to see a screenful of data at a time. To advance to the next page, simple hit the space bar.

6. And now, the tricky part. We have to change the home directory of our user (mrtestftp) from /home/mrtestftp to /home/misc/example.
System/Administration/Users and Groups

So let’s select our user:

And this is the information we are going to change:

And we will get this warning:

6. Ensure that your user, in my case mrtestftp, is part of the group users, in /etc/group


cd /etc # go to the etc directory
sudo cp group group.bkp # make a backup copy
grep users group # check to see what users are in the group users


You should get back a line that looks like:

users:x:100:user1,user2,mrtestftp

if the userid you want to use is there, great. Next step. If NOT, then edit the file /etc/group using your favourite editor, and add them.

NOTE: ANYTIME /etc/group CHANGES ARE MADE, YOU WILL NEED TO LOGOFF/LOGIN FOR THE CHANGES TO TAKE PLACE.

7. Fire up nautilus so we can make a change to the directory:


gksudo nautilus


BE CAREFUL HERE. We are going to change the group from mrtestftp to users. This way any local user can access these files.

Alternately, you can use chgrp as well.

8. And finally, we need to change the permissions on the directory and files, so that everyone can access them:


cd /home/misc/example # navigate to the directory
sudo chmod -R g=rx example # allow the group to read and execute


or for us old guys:


sudo chmod -R 755 example # change the permissions so that the group can access


9. Testing –