Wednesday, October 28, 2009
Brian Fields (aka AZ Rune) will be both hosting the November Phoenix Linux User Group and providing our monthly presentation content next Wednesday at the Cowden Center of (HIPAA Compliant) John C. Lincoln North Mountain Hospital from 18:00 until 20:30.Hackfests are semi-quarterly events that provide open encroachment using Linux Distro based pentest and exploit tools. Hackfests require registration, presentations do not. Presentations are held in public venues on community based networks, and provide no avenue for lab testing of security tools. Hackfests always need build engineers, IDS and forensic staff people with abilities in Snort, puppet and Backtrack4, Samari, DVL and OWASP tools. There is an open call for monthly presentations; contact lisakachold@obnosis.com.
http://plug.phoenix.az.us/node/1204
The Cowden Center is located in the North Mountain Hospital Complex at 9202 N. 2nd Street, Phoenix Arizona 85020. PLUG uses the Auditorium #180 since we generally have up to 40 students and professionals attend. The NEW DAY and time for our winter series is the First Wednesday of every month starting at 18:00 until 20:30 to give everyone a chance to show up late or come earlier.Presentation materials are available online the day of the event if you could not attend.
http://maps.google.com/maps?f=q&hl=en&geocode=&q=9202+N.+Second+St.,+phoenix+az&sll=37.0625,-95.677068&sspn=41.411029,74.794922&ie=UTF8&z=16&iwloc=addr
PLUG provides coordination with local educators for extra credit and happily organize signup sheets and content syllabus with teachers. Contact us to make arrangements.References:
http://arizonarune.blogspot.com/
http://www.hhs.gov/ocr/privacy/hipaa/enforcement/index.html
The Phoenix Linux User Group Security Lab members heartily thank everyone who has made these events possible including ABLEConf and LinuxFund.
http://plug.phoenix.az.us/node/1204
The Cowden Center is located in the North Mountain Hospital Complex at 9202 N. 2nd Street, Phoenix Arizona 85020. PLUG uses the Auditorium #180 since we generally have up to 40 students and professionals attend. The NEW DAY and time for our winter series is the First Wednesday of every month starting at 18:00 until 20:30 to give everyone a chance to show up late or come earlier.Presentation materials are available online the day of the event if you could not attend.
http://maps.google.com/maps?f=q&hl=en&geocode=&q=9202+N.+Second+St.,+phoenix+az&sll=37.0625,-95.677068&sspn=41.411029,74.794922&ie=UTF8&z=16&iwloc=addr
PLUG provides coordination with local educators for extra credit and happily organize signup sheets and content syllabus with teachers. Contact us to make arrangements.References:
http://arizonarune.blogspot.com/
http://www.hhs.gov/ocr/privacy/hipaa/enforcement/index.html
The Phoenix Linux User Group Security Lab members heartily thank everyone who has made these events possible including ABLEConf and LinuxFund.
Saturday, July 4, 2009
I'll be honest ...
Among friends it implies that someone is trying to be serious but in the Customer Service world the phrase "I be honest" impliess that everything else you have said may have been less than honest.
This leads me to what I wanted to write about:
:: Managing Foreground and Background processes ::
Now I am going for Ubuntu Certification and I can hope for some feedback after this. If the environment your working in today still uses terminal exclusive interfaces really get to know the admin. Buy him a beer, coffee, get him or her laid, whatever you have to do because that person is more than likely on top of their game. That being said, I feel more comfortable still in a windowed shell still, a GUI if you will.
I realize that back when X was not an option and everything was a terminal line interface that moving processes/tasks into the background was (ah heck, and still is) MEGA cool and a serious advancement in shell terminals. I am writing this blog from a tabbed browser at my work and I remember when Netscape Navigator 4.7 was NEW HOT STUFF!!! I make jokes with my co-workers about the day I got to say, "My dad just got a 28.8 baud modem! OMG I have never seen anything so fast!" I guess I realize why the advancements are cool and understand if you don't study the past you are doomed to repeat it. However, I like my Graphic User Interface and using terminal when I need to do system tasks. I am working on a deeper understanding and I believe when I practice terminal rote long enough perhaps I will appreciate terminal more than I do. I believe when I can get my schedule changed around to hook up with Lisa Kachold's Hackfest I will have more practical applications of terminal in using it to do tasks rather than rote learning.
Still knowing to throw and " & " at the end of a command to make it execute in the background is useful. Knowing that I can see what processes/tasks are running with the "jobs" command is very useful. Further knowledge of being able to bring forward the command I want utilizing " $ fg %1 (or whatever number process you want that is in the back ground) " is freaking fantastic! However, I don't myself likely to mess with another dumb terminal anytime soon, and if I did I can probably make a a null modem cable allow me to use a laptop of some kind with a GUI.
just my rant, view point, 2 cents, what have you.
Later,
arizona.rune@gmail.com
Sunday, June 21, 2009
Ok you have a folder on the desktop of your linux machine and you are trying to improve your terminal skills. Now you are normally in your home folder per your enviroment variables when terminal (BASH) opens.
For example:
[tech-slave@slave ~]$
Now lets say the folder you want to access is on the Desktop and called "n00b1." Now typing out:
$ cd /home/tech-slave/Desktop/noob1
may be a little long and tedious for some. Now there is the 1,000 command log of your BASH history file and other options but we aren't talking about those options today. Today we are talking about setting variables so to set it temporarily you can type:
$ NB=/home/tech-slave/Desktop/noob1 ; export NB
Now we have taken what can be a long directory path and assigned it to the NB variable. When we export to the NB command this propigates the value to the current BASH terminal session which then can be sent forward to any other shells you open while this one is running. Now you can reach the directory by typing:
$ cd $NB
Much less to type but this is the temporary value so when you exit the BASH terminal session the setting is lost. To make it permanent edit the ~/.bashrc file so it become permanent. Now if you only use this periodically you might want to think about making and executable text file and just launch the file when you need the variable.
Ahh GNU/Linux - choices, choices, choices :-)
Later,
arizona.rune@gmail.com
Sunday, June 7, 2009
TMOUT = Sets and inactivity timer before BASH will 'auto' logout.
=================================
Now the next to I am going to talk a little more about PATH and WHATEVER. Now in both Windows based PC's and Linux Based PC's Path is the list of directories (or folders for you Windows Users; not admins just users) where commands are executed.
Windows Example:
C:\Documents and Settings\User>path
PATH= C:\WINDOWS\system32;C:\WINDOWS\;C:\WINDOWS\system32\Wbem
This is where Windows (Yes this is XP command prompt) will check to launch programs such as notepad.
Windows Example:
C:\Documents and Settings\User>notepad.exe
\\ POOF // Notepad will open and you are back at the prompt
C:\Documents and Settings\User>
Before my fellow freax's (you will laugh at "freax" if you know what Linus Torvalds wanted to call Linux) get in a huff the Windows stuff is just to showcase what we are talking about today is cross platform. Linux and the various "nix's," i.e.: UNIX and other LINUX distrobutions have terminal/shell prompt which Windows Users will understand as command prompt. Now what we are discussing is how to set "Enviroment Variables" for the Bourne Again SHell (look at the capital letters and now you get BASH).
In GNOME GUI's you can access it via APPLICATIONS > ACCESSORIES > TERMINAL in the Ubuntu distrobution; and via APPLICATIONS > SYSTEM TOOLS > TERMINAL in Fedora. In most KDE GUI's you can find it in the "K" Menu > SYSTEM.
Alright now we have Terminal open and BASH running leaving us at the prompt.
[tech-slave@slave ~]$
Now we will tell it to echo PATH
[tech-slave@slave ~]$ echo $PATH
While I will address the dollar sign briefly. The dollar sign is a metacharacter in BASH and by default most people see it as the last character in the prompt telling them they are working as a standard user where working as 'root' user will show a hash mark or '#' as the last character in the prompt
Ubuntu ex: [tech-slave@slave ~]$ sudo bash
[tech-slave@slave ~]#
Fedora ex: [tech-slave@slave ~]$ su
[tech-slave@slave ~]#
Now the $ sign is also used as the metacharacter to set argument variables or expanding on environment variables. I am not going more in depth on that right now since I could write an article on that by itself.
[tech-slave@slave ~]$ echo $PATH
/usr/lib/qt-3.3/bin:/usr/kerberos/bin:
/usr/local/bin:/usr/bin:/bin:/usr/local/sbin:
/usr/sbin:/sbin:/home/tech-slave/bin
/usr/local/bin:/usr/bin:/bin:/usr/local/sbin:
/usr/sbin:/sbin:/home/tech-slave/bin
Unlike with Windows the directories are seperated by colons ":" and not semi-colons ";" helping see each location. As with my previous post"Setting Your Prompt for Bash" you can make permanent changes to your BASH by editing the ~/.bashrc file.
Now if you want to add you present working directory (PWD) to PATH for this BASH session you can do so by typing the following command:
PATH=.:$PATH : export PATH
Now you may not want the present working directory (PWD) to PATH and if you want to specify a specific directory you should phrase your command like the following.
Ex: This command refers to my Crossover Office directory where I run Microsoft Excel for certain spreadsheets.
PATH=$PATH:/home/cxoffice/bin : export PATH
This will check will first read the listed directory and add it to path then we export the new modified PATH.
=================================
Now in section three of this (god awful long post) we will tackle the WHATEVER command to provide yourself ways to shortcut to directories on your filesystem to speed up you work in BASH. I have a 'note' directory in my 'Documents' directory within the /home/tech-slave directory. I want to create a quicker way to access it than the following command:
$ cd /home/tech-slave/Documents/note
So I am going to use N to remind me of note and set up the following link:
N=/home/tech-slave/Documents/note : export N
Now I'm going to make that my current directory by typing:
$ cd $N
and there you have it.
More next time, later.
arizona.rune@gmail.com
Saturday, June 6, 2009
Now I am running Fedora 10, on the first HDD and Ubuntu 9.04 on the second HDD so my default BASH prompt has the following parameters:
"Username, Hostname, and the name of the PWD or present working directory" surrounded in brackets.
ex.: [tech-slave@slave ~]$
FYI Note " ~ " is shown to represent your home directory (i.e. ~ = /home/yourusername)
so.. $ cd /bin
[tech-slave@slave bin]$
There are some temporary options that will alter how your prompt appears.
"Username, Hostname, and the name of the PWD or present working directory" surrounded in brackets.
ex.: [tech-slave@slave ~]$
FYI Note " ~ " is shown to represent your home directory (i.e. ~ = /home/yourusername)
so.. $ cd /bin
[tech-slave@slave bin]$
There are some temporary options that will alter how your prompt appears.
Three examples \t (time) \d (date) \w (displays full path of the PWD)
So to execute the tempory change you would type:
$ export PS1="[\t \d \w]\$ "
Giving you [20:43:33 Sat Jun 06 /bin]$
Now to permanently alter these setting for the prompt then make the changes in your ~/.bashrc file for them to last after you close your current shell. Now in other files you might change a setting but with this one you can just add the line at the end of the file and save the change.
arizona.rune@gmail.com
Wednesday, June 3, 2009
Mike(21:44:14): that ninjua tux is my new mascot lol
Brian(21:44:22): hehe
Mike(21:44:37): you stole the jedi i got ninja w00t
Brian(21:45:10): Pirates. Ninjas. A Jedi cares not about this, only the code matters (Open Source that is :^P )
Mike(21:45:28): Wow.. i have nothing, that really was awsome
Brian(21:44:22): hehe
Mike(21:44:37): you stole the jedi i got ninja w00t
Brian(21:45:10): Pirates. Ninjas. A Jedi cares not about this, only the code matters (Open Source that is :^P )
Mike(21:45:28): Wow.. i have nothing, that really was awsome
Sometimes you just win
arizona.rune@gmail.com
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