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Valgrind Home
Valgrind is an award-winning instrumentation framework for building dynamic analysis tools. There are Valgrind tools that can automatically detect many memory management and threading bugs, and profile your programs in detail. You can also use Valgrind to build new tools.

The Valgrind distribution currently includes six production-quality tools: a memory error detector, two thread error detectors, a cache and branch-prediction profiler, a call-graph generating cache profiler, and a heap profiler. It also includes two experimental tools: a heap/stack/global array overrun detector, and a SimPoint basic block vector generator. It runs on the following platforms: X86/Linux, AMD64/Linux, PPC32/Linux, PPC64/Linux, and X86/Darwin (Mac OS X).
c  debug  linux  memory  programming 
february 2010 by jtth
Daring Fireball: Ronco Spray-On Usability
The distributed, collaborative nature of open source software works for developer-level software, but works against user-level software. Imagine a motion picture produced like a large open source project. Different scenes written and directed by different people, spread across the world. Editing decisions forged by group consensus on mailing lists. The result would be unfocused, incoherent, and unenjoyable.
apple  linux  macosx  usability  windows 
january 2010 by jtth
Nmap Network Scanning
Nmap Network Scanning is the official guide to the Nmap Security Scanner, a free and open source utility used by millions of people for network discovery, administration, and security auditing. From explaining port scanning basics for novices to detailing low-level packet crafting methods used by advanced hackers, this book by Nmap's original author suits all levels of security and networking professionals. The reference guide documents every Nmap feature and option, while the remainder demonstrates how to apply them to quickly solve real-world tasks. Examples and diagrams show actual communication on the wire. Topics include subverting firewalls and intrusion detection systems, optimizing Nmap performance, and automating common networking tasks with the Nmap Scripting Engine.
scan  sysadmin  hack  reference  hacking  tutorials  software  network  ebook  nmap  tools  book  manual  tutorial  books  firewall  linux  computers  packet  read  scanning  research  security  free  networking  apps 
july 2009 by jtth
Goin' grep'in
Grep quick ref.
grep  unix  linux  cli  tool 
june 2009 by jtth
Compare and Contrast: Ubuntu 9.04, Mac OS X 10.5.6
In essence, Mac OS X 10.5.6 seems to be the better operating system according to these benchmarks, at least in the area of Mac Mini-esque hardware.
benchmark  mac  apple  unix  linux  ubuntu 
may 2009 by jtth
Bootchart
Bootchart is a tool for performance analysis and visualization of the GNU/Linux boot process. Resource utilization and process information are collected during the boot process and are later rendered in a PNG, SVG or EPS encoded chart.
software  tools  visualization  performance  linux  sysadmin  opensource  boot 
may 2009 by jtth
PS3Cluster Guide: By The Cluster Workshop
Our community guide allows you to set up your own MPI (Message Passing Interface) based supercomputer cluster with the Playstation 3. This guide was co-written by Gaurav Khanna, based on his previous work on the Gravity Grid and is a current run-time environment for the research of co-author (Chris Poulin), based on his current work in distributed pattern recognition. As such, we currently utilize the Fedora Core for this infrastructure and illustrate a "how-to" below. NOTE: We focus on the Fedora 8 distribution, due to prevalence of Fedora and its Cell SDK (3.0) compatibility. Finally, this content should be considered open source, and here is the license.
howto  software  computer  tutorial  linux  opensource  guide  computing  game  tool  diy  games  hardware  2008  cell  beowulf  parallel  sony  supercomputer  clustering  supercomputing  mpi  playstation  ps3  gpu  hpc  cluster 
december 2008 by jtth
PyInstaller
PyInstaller is a program that converts (packages) Python programs into stand-alone executables, under Windows, Linux and Irix. Its main advantages over similar tools are that PyInstaller works with any version of Python since 1.5, it builds smaller executables thanks to transparent compression, it is multi-platform (so you can build one-file binaries also under Linux), and use the OS support to load the dynamic libraries, thus ensuring full compatibility.
py2exe  deployment  packaging  compiler  pyinstaller  exe  installation  tool  python  crossplatform  install  installer  binary  development  developer  free  linux  tools  programming  software  opensource  distribution 
november 2008 by jtth
[linux-cifs-client] Is NTLMv2 really supported?
Yes, it is. Add client ntlmv2 auth = Yes to your smb.conf file to auth to any NTLMv2 Active Directory server, like all the ones at IU.
samba  networking  linux  network  howto  configuration  support  windows  activedirectory 
september 2008 by jtth
PARI/GP Development Headquarters
PARI/GP is a widely used computer algebra system designed for fast computations in number theory (factorizations, algebraic number theory, elliptic curves...), but also contains a large number of other useful functions to compute with mathematical entities such as matrices, polynomials, power series, algebraic numbers etc., and a lot of transcendental functions. PARI is also available as a C library to allow for faster computations.
science  software  programming  computer  tools  linux  math  mathematics  opensource  education  development  language  library  academic  theory  number  system  calculator  algebra  C  cas  number_theory  pari-gp  gp  matematica  number-theory 
august 2008 by jtth
Advanced techniques for using the UNIX find command
Awesome illustration of advanced usage of the unix "find" command.
unix  find  linux  shell  tips  tutorial  reference  article  bash  command  example  howto 
july 2008 by jtth
Scapy
a packet manipulation framework for python
cs  dev  generator  hacks  imported  languages  network  linux  python  scapy  packet  tutorial  programming  tools  security 
july 2008 by jtth
Obsolete Microkernel Dooms Mac OS X to Lag Linux in Performance
However, I think we've come to a point where the record speaks for itself, and the microkernel project has failed. Yet this still doesn't cleanly vindicate Linux merely because it has a monolithic kernel. Sure, Linux need no longer envy Darwin's microkern
architecture  article  computer  darwin  humour  kernel  linux  macosx  osx  Performance  programming  science  microkernel 
april 2008 by jtth
USENIX - Publications - Proceedings
Announcement: All online conference proceedings are now freely available to everyone. This significant decision will allow universal access to some of the most important technical research in advanced computing. In making this move USENIX is setting the s
usenix  unix  linux  research  computing  computer  science  compsci  conference 
march 2008 by jtth
UNIX tips: Learn 10 good UNIX usage habits
Adopt 10 good habits that improve your UNIX® command line efficiency -- and break away from bad usage patterns in the process. This article takes you step-by-step through several good, but too often neglected, techniques for command-line operations. Lear
unix  linux  tips  guide  habit  cli  ibm  article 
february 2008 by jtth
Hackszine.com: Eavesdropping on Bluetooth headsets
Eavesdropping on Bluetooth Headsets when they're not in use is so easy. Maybe this will muscle manufacturers to allow variable headset pins.
bluetooth  linux  hack  hacks  hacking  Reference  wireless  mobile  hardware  Security  technology  electronics  video 
january 2008 by jtth
FOSSwire » Fix a Frozen System with the Magic SysRq Keys
Mashing in the power button to reboot could cause a problem if your hard drive is still being written to, and usually causes more problems than it solves. The Linux kernel includes a secret method of restarting your PC should it ever stop doing its job.
linux  howto  reboot  tips  crash  kernel  reference  open  sysadmin  tech  tip  cool  computing  computer  commands  blog  admin  lifehacks  tools  trick  tricks  troubleshooting  tutorial  help  guides 
september 2007 by jtth
blog gnist org - Holliday cracking
Documentation of a process of performing computer forensics on a Linux rootkit intrusion.
forensics  forensic  computer  system  administration  sysop  admin  sysadmin  root  linux 
august 2007 by jtth
[no title]
A guide to installing SELinux in Gentoo-Hardened.
selinux  security  linux  gentoo  howto  guide 
july 2007 by jtth
NewsForge | My sysadmin toolbox
Guide to doing some security-related stuff in linux like GRSecurity/PaX in debian.
sysadmin  linux  tips  tip  howto 
july 2007 by jtth
SECURITY System Encryption DM-Crypt with LUKS - Gentoo Linux Wiki
A guide for encrypting swap space and other filesystems using a variety of methods.
encryption  security  filesystem  gentoo  linux  howto  guide  wiki 
june 2007 by jtth
NixOS
An interesting paradigm shift in package management for linux.
package  deterministic  software  management  operatingsystem  system  operating  linux  unix  nix 
april 2007 by jtth
Envy
Envy installs proprietary drivers in Ubuntu and takes care of dependencies, too. Insta-beryl.
graphics  linux  install  installer  driver  nvidia  ati  beryl 
february 2007 by jtth
Ubuntu on MacBook Pro - Ubuntu Forums
A guide for double or triple-booting the Macbook Pro
linux  macbook  pro  mbp  apple  os  x  osx  ubuntu  forum  forums  guide  howto 
february 2007 by jtth
Installing a large Linux cluster, Part 1: Introduction and hardware configuration
Create a working Linux® cluster from many separate pieces of hardware and software, including IBM® System x™ and IBM TotalStorage® systems. This part in this multipart series covers hardware configuration, including understanding architecture, planni
linux  cluster  howto  ibm  guide  walkthrough  technical  design  networking  hpc  beowulf 
january 2007 by jtth
Linux Shell Scripting Tutorial - A Beginner's handbook
A guide to Linux shell scripting, recently featured on digg.
shell  scripting  guide  howto  book  introduction  linux  unix  handbook  beginner 
january 2007 by jtth
Locking Down Ubuntu - Linux Forums
How to (kind of) lock down Ubuntu. I'm still a fan of Bastille.
security  linux  ubuntu  kubuntu  firewall  setting  settings 
december 2006 by jtth
Linux.com | Nexenta combines OpenSolaris, GNU, and Ubuntu
A review of the alpha release of an OpenSolaris distribution combining Unbuntu and the GNU toolset.
solaris  opensolaris  opensource  gnu  ubuntu  nexenta  livecd  openoffice  gaim  linux  dtrace  zones  operatingsystem 
october 2006 by jtth
The Perfect Setup - CentOS 4.4 (32-bit) | HowtoForge - Linux Howtos and Tutorials
This is a detailed description about how to set up a CentOS 4.4 based server that offers all services needed by ISPs and hosters; web server (SSL-capable), mail server (with SMTP-AUTH, TLS), DNS server, FTP server, MySQL, POP3/IMAP, Quota, Firewall, etc.
howto  setup  linux  cent  redhat  opensource  article 
october 2006 by jtth
TheOnionRouter/AnonymousPublicSpeech - Noreply Wiki
This article details how to hold a webconference with complete anonymity.
anonymous  tor  freedom  privacy  speech  voip  voice  vnc  ssh  linux  conference 
october 2006 by jtth
Boot Linux faster
An IBM article about running startup scripts in parallel for faster booting.
linux  ibm  startup  init  scripting 
september 2006 by jtth
newbie_guide [Aircrack-ng]
N00b guide to setting up aircrack and cards in linux.
card  crack  wifi  wireless  linux  opensource  hack  hackers  hacking 
august 2006 by jtth
faq [Aircrack-ng]
A FAQ describing the best wireless cards to buy for wardriving/injection/pentesting.
crack  hardware  linux  network  wifi  opensource  card  guide 
august 2006 by jtth
The Linux Orinoco Driver - Summary [Savannah]
Newest version of the orinoco linux drivers.
linux  drivers  wireless 
august 2006 by jtth
Magic City Morning Star: Patent Law Ruling Threatens Free and Open Source Software
In a recent decision, the Federal Circuit Court of Appeals affirmed its own "suggestion test" as the main method for determining when a patent should be found obvious over knowledge in the public domain. Under this test, even the most obvious incremental
law  linux  news  opensource 
august 2006 by jtth
ROAD - Die Zukunft des Mobile Computing
Phone I'm interested in. Linux-based Qtopia platform with quad-band GSM, Bluetooth and Wifi. I can't wait.
handheld  phone  linux  wifi  bluetooth  qtopia  road 
august 2006 by jtth
ClamXav - Download Page
A freeware virus scanner for Mac OS X.
virus  antivirus  pentest  macosx  linux  apple  unix 
august 2006 by jtth
The best software ever written
A fantastic recount of the greatest software ever written. Number 1? BSD 4.3 building off the philosophies of Unix.
unix  ibm  software  coding  digital  dec  chess  genome  genetics  computerscience  linux 
august 2006 by jtth
TECTONIC: Howto: Ultimate Ubuntu eye-candy with Xgl and Compriz
If you're a little less excited than I am, perhaps you're thinking of waiting a while until it's working in Dapper. Here's the thing: thanks to a few brave souls, it already is. What?! you say? Okay, it's quite beta, but that's part of the fun, right? And
linux 
march 2006 by jtth
ProFont for Windows, for Macintosh, for Linux
ProFont is a small bitmap font which is absolutely great for programming. It was made for Macintosh computers, but now it's also available for Windows and Linux/UNIX X Windows.
apple  programming  font  Fonts  windows  Typography  linux  mac  free  macosx  misc  opensource  win32  development  desktop  design  tools  webdesign  unix 
february 2006 by jtth
Installing Sun Java on Debian
A detailed howto on installing Sun's Java virtual machine in Debian.
howto  linux  java 
february 2006 by jtth
Using the Ports Collection
How to update and maintain the FreeBSD Ports collection.
bsd  freebsd  linux  programming  sysadmin  unix 
february 2006 by jtth
bmon - bandwidth monitor and rate estimator
bmon is a portable bandwidth monitor and rate estimator running on various operating systems. It supports various input methods for different architectures. Various output modes exist including an interactive curses interface, lightweight HTML output but
monitoring  networking  network  linux  tools  unix  monitor 
january 2006 by jtth
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