Open source tech

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Contents

tech

linux

window manager stuff
tools and toys
  • terminator terminal emulator with many features, including tabs and split windows

Some useful keys 

Ctrl+Shift+O Split terminals Horizontally.
Ctrl+Shift+E Split terminals Vertically.
Ctrl+Shift+Right/Left/Up/Down Move parent dragbar.
Alt+Right/Left/Up/Down Move to different terminals
  • tmux terminal multiplexer
  • midnight commander curses based file manager
  • conky system monitor
  • vimperator vi style control of firefox/iceweasel web browser. So you can control the web browser without using the mouse.
  • aap makes it easy to download, build and install software
  • calmar.ws tips and info on linux,vim, vimperator, awesome, other stuff
  • refcards.com free quick reference cards
  • fcron.free.fr apparently good for running cron jobs on a system not always switched on.
  • 30 handy bash aliases
  • Baobab gnome disk usage analyser - visual representation of disk usage
vi text editor


email software
graphics
  • gimp gui graphics editor (like photoshop)
  • inkscape gui vector graphics editor (like corel draw)
  • feh a fast and light image viewer 
left - previous image
right - next image
up/down - zoom
/ - zoom to fit window 
d - toggle display filenames
Ctrl + delete - delete file
m - menu
  • imagemagick powerfull tools for converting, editing and composing images. Good for batch image processing.
backup/archiving
diff -qr source destination
comm -3 <(ls ~/dir-new/) <(ls ~/dir)        # compare two directories

Find duplicate files: 

find -not -empty -type f -printf "%s\n" | sort -rn | uniq -d | xargs -I{} -n1 find -type f -size {}c -print0 | xargs -0 md5sum | sort | uniq -w32 --all-repeated=separate

Find and delete duplicate files: 

find -not -empty -type f -printf "%s\n" | sort -rn | uniq -d |  xargs -I{} -n1 find -type f -size {}c -print0 | xargs -0 md5sum | sort | uniq -w32 --all-repeated=separate | cut -f3-100 -d ' ' | tr '\n.' '\t.' | sed 's/\t\t/\n/g' | cut -f2-100 | tr '\t' '\n' | perl -i -pe 's/([ (){}-])/\\$1/g' | perl -i -pe 's/'\/\\'\/g' | xargs -pr rm -v

booklet printing on linux

some tools, for example, for reordering pages of an a4 documents to make an a5 booklet or zine. 

pdf2ps                                              # convert a pdf document to postscript      
psbook in.ps out.ps                                 # reorder the pages to make a book,  
psnup -s1 -2 book.ps booklet.ps                     # shrink to 2 pages on each A4 side
ps2pdf in.ps out.pdf                                # convert it back to a pdf

If you dont have a duplex printer probably you want to print the even pages, put them in the paper drawer (the right way around! very confusing!) then print the odd pages 

lpr -P myprinter -o page-set=even -#1 infile.pdf    # print the even pages  
lpr -P myprinter -o page-set=odd -#1 infile.pdf     # print the odd pages

encryption

Most simple usage - gpg encryption of a single file: 

 gpg -c file

This prompts for a password and gives file.gpg. To decypt: 

 gpg -d file.gpg > file

tools for those who have little or no connection to internet

  • kiwix wikipedia offline reader - read wikipedia when not connected to internet. The english wikipedia (text only, no images, user pages or discussion pages) compresses to about 8gb! You will need to download this data in 'zim' format, available as a torrent. list of wikipedias
  • openstreetmap collaborative mapping project. it is also possible to download openstreetmap (even the whole planet) for offline viewing using a software called navit (which i still havent succussfully used), other software projects are Emerillon and Marble.
  • OfflineIMAP software for syncronising imap mailboxes. It is useful for unreliable or slow internet connections or when you want to read email offline.
  • hitchwiki.org can also be downloaded to view offline hitchwiki while offline. The database is downloaded in XML format which can be viewed with various kinds of dictionary viewing software.
offline dictionary for linux

goldendict which can work with freedict dictionaries. To add, for example, scottish gaelic to german dictionary (on debian): 

apt-get install dict-freedict-gla-deu

for a list of all dictionaries (on debian): 

apt-cache search dict-freedict

filesharing

 * torrent411 good torrent tracker (french)
 * rutracker.org good torrent tracker (russian)
 * zeropaid filesharing news and forum
 * tracker2.postman.i2p i2p torrent tracker (you must be running i2p to access)
 * imule p2p sharing software for i2p (also an i2p eepsite)

audio software

  • hydrogen audio forums about audio software etc
  • rockbox open source firmware for music players. Very useful if the original firmware wont play certain formats, or has restrictions on copying music off the player. Can run on Sansa clip.
  • mpd music player daemon. music playing software designed to be run over a network. If there is a network attached computer connected to an amplifier and running mpd, other computers on the network can control the player by using mpd client software (of which there are many to choose from, i use ncmpcpp). Can run on raspberry pi. Client and daemon can also both be running on the same computer. mpd and ncmcppp guide
  • cmus curses based music player software (linux, console based)
  • moc another, simpler, curses based player
  • DeaDBeeF GUI music player
  • randomplay even simpler console player
  • beets music collection organising tool. useful for tagging and organising a large collection.
  • Linux multimedia studio (LMMS) free music production software, with VST compatibility.
  • sox command line sound tool. can be used as simple synthesiser, and to convert audio formats.
  • Mumble voice chat software
  • Mixxx Open source DJ software
  • xwax: Digital vinyl on Linux Open source software for DJing using time-coded vinyl (like Serato scrarch)

to take 30 random mp3s and put them in a directory (i use this to randomly choose some of my music to put onto my mp3 player): 

find -name "*.mp3" | sort --random-sort | head -n 30 | xargs -n 1 -i^Cd '\n' cp {} ~/sometunes

audio hardware

  • diyaudio.com forums about diy audio hardware projects
  • Standuino DIY open source audio hardware
  • speakerplans.com designs for speaker enclosures
  • horn response - speaker enclosure design software. can use with abaca? audio abacus


other

Many of these links need to be (or already have been) put elsewhere on the wiki


non-commercial email providers

please add more

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