Description |
Highlights |
Code in Rust |
Code in Python |
Code in POSIX shell |
Code in C |
Code in C++ |
Code in Java |
Code in C# |
Code in Perl |
Code in JavaScript / TypeScript |
Code in Haskell |
Code in Golang |
Programming: theory and building blocks |
Problem Solving: abstract and instances |
Automation |
*ix in general |
Linux specifics |
Solaris specifics |
AIX specifics |
MacOS specifics |
Performance |
Networking |
Security |
Graphics and/or GUI |
Web stuff |
Database |
Printing |
System Administration |
E-Mail |
Spam |
Large Storage |
Host Documentation |
Persuading Neovim to treat #!/usr/bin/env pypy3 files as filetype python |
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IQS2: A portable 'ultrabatch' scheduler class for Linux |
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pybenoit |
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drsmenu |
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line-lengths-summary |
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mactools: create MacOS apps from GUI-utilizing scripts |
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Install-cgoban3 (for KGS) |
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python-thread-comparison |
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zip-distances: find all zip codes within n miles of a target zip code |
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frequencies: count word frequencies on stdin |
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Computing a square root using Newton's Method |
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Rolling-checksum-mod |
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just-one |
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log-gap |
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bpe: a binary patch editor |
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screen-movie: capture a video of your screen, even on an old, slow computer |
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true-false-tournament: run a command and compute percent success |
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fractal-dragon: an eye-pleasing mathematical object |
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coordinate: yet another n shell commands m at a time |
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histogram: generate a histogram of values read from stdin |
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Malloc-wrapper |
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srsh: an rsh with secure authentication (of purely historical interest) |
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MD5 performance comparison across a few different languages |
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TCP/IP and message boundaries |
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Catenate-mp3s |
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Music-pipeline |
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Bidir: Keep the latest of two files, overwriting the older |
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pylint-json-report |
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bgrep: a binary grep tool |
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setup-passwordless-ssh |
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The House Robber Problem, solved using a Genetic Algorithm |
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Performing set arithmetic on files |
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On strongly vs weakly typed languages |
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Getting a hierarchical process list |
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'Why is Python so slow?' |
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find-dead-links: Find dead and malformed links on a website |
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pythons: run a command or file on several python implementations |
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cpythons: build several Cpython versions automatically |
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bcgrep: a grep tool with experimental support for not fouling your buffer cache |
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hcm: Run predefined commands on predefined hosts with minimal clicking |
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The alien language problem |
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Play-music-collection |
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Python's Calling Convention |
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Learning C Quickly |
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6502 programs |
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from-table: extract HTML tables as csv |
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semirandom: rearrange lines from stdin a little bit |
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recent: identify recently modified files |
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database: a shell-callable interface to single-table databases |
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Shadow Password Suite |
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goo: a flawed go AI |
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newstosgf: change rec.games.go ASCII diagrams into SGF for more pleasant viewing |
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Kentou: memorizing pro 'go' games |
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toaster: improving the security of old *ixes by turning off most services |
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ppmdist: convert low numbers of colors in a picture to high-contrast grayscale |
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maxtime |
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circle.png: an application of the inverse square law |
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Screensaver stuff |
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soksoo: An automatically-derived SGF file with joseki mistakes and punishments |
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Pggo: A PyGame interface to GnuGo |
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bash's $PS0 prompt |
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dedup-notes: deduplicate a file with a line-oriented delimiter |
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snapcat: like dd but with variable blocksizes |
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NFS performance tweaking |
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On heaps and garbage collection |
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A performance comparison (on an unrepresentative microbenchmark) between C++ and Python |
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this-pylint: Check python code against 2.x and 3.x pylint allowing selected messages to be ignored. Suitable for use in a Makefile or related tool |
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Mandelbrot web-browser performance comparison: C/ECMAScript vs Brython |
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sieve: Compute primes beneath a particular value |
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bits_mod: An array of bits |
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Fibonacci-heap-mod: A Priority Queue implementation with nice theoretical performance |
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Interesting-quotient: demonstrates some repeating decimals |
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Limited-fingerd: a finger daemon that gives the user the option of not publishing much information |
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gquiz: drilling on questions and answers |
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Head0: a null-terminated head(1) program |
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Binary Trees |
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Scapegoat Trees |
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to-table2: Automatically converting CSV to an HTML table |
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Why you should use Solaris 2.x instead of SunOS 4.1.x |
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Rot13 - very minimal (weak) encryption for things you don't care to protect well - EG movie spoilers or joke punchlines |
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Recreating directories for the sake of adding ext3 indexes |
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A splay tree implementation |
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A list of datastructure implementations I've worked on |
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A linked list implementation in pure python |
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An implementation of Diffie-Helman key exchange |
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Prime numbers |
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Python dictionaries (or dict-like objects) that allow duplicates |
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Generating all valid anagrams from an input word or phrase |
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Copying data from a stochastically failing hard disk |
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An exploration of common POSIX threading mistakes in C |
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MIT Open Courseware Java assignments |
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Comparison of available Python-in-the-Browser technologies |
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Fibonacci sequence |
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red-black-tree-mod |
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Speeding up Python |
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Python Tree Comparison |
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ttype - single character non-echoed tty I/O in C |
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Sort Comparison |
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Drs-bloom-filter |
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Pyrabinf: A C++ Rabin Fingerprinting implementation wrapped for Python callability using Cython |
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Backshift: A deduplicating backup system |
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Fast GUI pipe meter |
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Finding a zip code at the center of n zipcodes |
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On the use of significant whitespace in a programming language |
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A treap implementation in Python |
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Looper: Running n commands m at a time with good error checking |
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replacebell: Making X use a nicer bell sound |
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daemon: daemonizing arbitrary programs |
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UCI-yppasswd: a yppasswd extended to do password testing |
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working-set: a benchmark for measuring OS memory overhead |
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symmat: symbolic matrix arithmetic |
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A /usr/bin/script reimplementation |
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Usenix/LISA December 2005 Recovering from Linux hard drive disasters |
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Reading null-terminated lines - and other delimiters |
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odirect - deterring buffer cache pollution |
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The distinction between hardware and software |
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Counting lines of text in a pipeline with a progress report |
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Searching for a large number of patterns in a larger amount of ASCII data |
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A python module to convert nonnegative whole numbers to/from a null terminatable string |
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A caching dictionary wrapper around python databases like gdbm, Berkeley DB and ndbm |
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Software for DCSLIB |
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Merging AIX libraries |
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How to make a website more plucker-friendly |
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Network trouble on autoinst |
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Testing a network to see what of half/full 10/100/1000BaseT works well |
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Splitting a file into multiple files on regex boundaries |
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Open source desktop search applications |
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A means of indexing directories in an ext3fs without backup and restore |
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A couple of programs for summarizing disk use |
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Efforts to write a device driver for an Olympus VN480PC |
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Running a single command on many hosts - some programs for doing it |
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WDS notes |
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Rebooting a hung Sun |
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loop: running a large number of parameterized shell commands |
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An exploration of the relationship between setpgrp and exit |
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Generic hashing routines |
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Why you should use ADT's in your code |
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OPeNDAP stuff |
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Empirically determining your system's maximum TCP window size |
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Converting Redhat static routes to AIX static routes |
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The relationship between malloc and sbrk or 'Why is my program's RSS growing even though I keep free'ing memory?' |
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A program to gracefully notify users when a set of URL's have moved |
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A pair of programs for merging NIS domains or other /etc/passwd-style databases |
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An overview of how X11 works |
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Indexing a list of files |
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Dividing files up into equivalence classes |
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Stamp: An OS signature generator and comparator |
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Increase privilege with your own password |
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IQS: A portable 'ultrabatch' scheduler class for Unix |
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For displaying pbm images on an ancient hercules video card |
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Plpd: A BSD-compatible print system |
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Sunrays in ET509 |
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Perl notes |
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oacstats: behind the scenes doc |
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Loadleveler notes |
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DTrace notes |
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dcs.nac boot trouble |
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bpgetfile workaround |
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Big dd hypothesis |
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Bash notes |
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Writing portable Bourne shell scripts |
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Wifi and cordless phone conflicts |
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What program is active on that port? |
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VPN info |
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Usenix 2005: Next Generation Storage |
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Useful AIX commands |
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Unix and Linux filesystem recovery without LVM or other volume management |
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Troubleshooting a gnome problem early in the login |
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SunFire V490 notes |
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Sun video configuration |
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Sun alternate break sequence |
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Sun StorEdge 3511 installation notes |
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Solaris 'zones' notes |
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Solaris Patch Pro |
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Solaris notes |
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Samsung ML-2150 laserprinter with Samba and CUPS |
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SAM-FS notes |
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Redhat linux commands |
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Redhat NFS trouble |
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Rebooting portions of the ESMF |
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Rebooting an IBM SP2 compute cluster |
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POPTOP (PPTP) notes |
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PalmOS network diagnostics |
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Orange County computer stores with a web presence |
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Networked Hewlett-Packard printer notes |
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Netreo SNMP notes |
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NX (the graphics compression system not the NoeXecute bit on newer Intel and AMD CPU's) |
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NFSv4 notes |
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NFS timeout notes |
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MySQL notes |
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Maxtor RMA procedure |
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Machine room options |
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Low bandwidth addons for X11 |
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Loadleveler problems and resolutions |
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Linksys WRT54G notes |
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Keeping backups from pounding a system |
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HSSOE spam filtering |
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Free X11 server options |
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Floppy disk notes |
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Fedora Core 3 notes |
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FLOSS development NNTP server |
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Encrypting documents |
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EXT3 filesystem recovery |
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ESMF scheduler notes |
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ESMF ratio of data blocks to inodes |
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Debugger notes |
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CUPS notes |
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Checking a hardware component for compatibility with your OS |
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Local stores/chainstores with Wifi access |
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Stripped down MTA's |
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Matlab on AIX 5.1 |
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Documentation about 3Ware RAID cards and Maxtor drives |
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Solaris 10 bootcamp notes |
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A framework for conducting lots of related network performance tests |
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A program for computing the average and standard deviation in numbers on stdin |
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pnetcat: like netcat but fast and flexible |
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What to do when you don't know the first thing about a software system you need to work with immediately |
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Overview of methods of recovering lost deleted or damaged data |
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Overview of my Sun-related pages |
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Fast pseudorandom number generator for benchmarking |
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Optiputer notes |
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Python module and shell command for converting modular units |
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Generate reports from columnar data |
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AIX accounting |
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Finding the largest directories in a filesystem |
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Changing a Sun from multiple partitions to a single partition |
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RS-232 notes |
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Sun StorEdge 3511 notes |
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Sun QFS notes |
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kill-duplicate-process program |
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Recovering root access |
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Finding the n highest numbers in a huge list |
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Linux and USB disks |
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Converting PDF files to Plucker format |
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A program for finding the pid of another program |
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Why it's important to check for errors early in programs |
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Convert databases like Sleepycat GDBM etc. to other formats |
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Chopping stdin into chunks to be fed to individual subprograms |
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AIX shared libraries: Not the same old |
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Network performance: Definitions with analogies Measuring and Improving |
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A simple host to host disk to disk backup script |
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Searching for files recursively |
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Recovering lost e-mail |
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Mounting readonly NFS replicas |
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A fallback reboot procedure when a host is pingable but not allowing logins |
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Converting binary data |
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Sun E250 notes |
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ESMF data recovery |
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Ethereal notes |
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Automatically converting select Palm memos to web pages |
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Methods of verifying data transfers compared |
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The standard 'nice' program is good for CPU hogging processes. 'slowdown' is good for I/O hogging processes. |
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RAID overview |
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XFree86 |
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Duplicating SunOS disk labels in a way that may be less confusing to future admins |
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On getting command line arguments to not show up in 'ps' |
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Sendmail notes |
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QEMU |
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Automatically determining what environment variables may be related to a program working under one account but not another |
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Getting decent HTML handling out of various MUA's |
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Contextual: Adding text relative to other text already in a file |
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A simple GUI API for python based on Xdialog and similar |
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Notify the user when a state changes |
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Debugging with system call tracers |
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Clean up messy HTML |
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DSPAM |
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NFS troubleshooting |
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Search for the library containing unresolved externals |
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Getting ETA and throughput out of a pipeline |
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Cobble: A simple source code control system targeted at minimally modified baselines |
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The Sun diskless boot process |
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A buffered socket module for python |
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Testing the health of registered RPC services |
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Multihop ssh through firewalls inspired by UUCP |
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Obtaining a static hostname without a static IP address |
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Setting up a PXE server (courtesy of Tim Cook) |
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Efforts to get a working CCSM3 geometry for the ESMF |
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Testing SSL services |
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PalmOS applications |
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Verifying a data transfer from a suspect filesystem |
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Enabling jumbo frames for network performance |
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mtee: piping stdin to multiple consumer subprocesses |
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Setting up Xprint on Solaris |
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Redhat Enterprise Linux headless installation |
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Setting up a release of Solaris for jumpstarting/autoinstalling |
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3Ware RAID card tuning |
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SunOS software RAID |
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Hanging an antispam filter off of evolution |
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Linksys 'BEFSR' hardware |
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VNC |
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MPC/GradEA host documentation |
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Setting up a Solaris jumpstart procedure to allow incoming stel |
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ESMF host history |
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NBD and GNBD |
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Sending nagios notices to your cell phone or pager without getting flooded |
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IBM SP switch |
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History of host dcs.nac |
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Using the magic SysRq facility |
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Setting up a screensaver to present the status of the hosts you manage |
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Run a program only after a specific file becomes available |
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The Lustre filesystem |
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The GFS filesystem |
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Linux software RAID |
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Some things to try on systems that are crashing |
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Checking hosts behind a firewall with nagios |
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Building Redhat Enterprise Linux kernels |
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Copying lots of data - more than you wanted to know |
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Problem solving techniques for *ix |
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