1

• incal {11!
• EBC
• xdotool example
• make-a-title
• shoe sizes

Emacs

• "sentence"
• C-y M-y yank kill-ring backwards
• (setq-default case-fold-search nil)
• (what-line)
• Mode line %-Constructs
• buffer-substring
• (scroll-left 1), (scroll-right 1)
• Multics history
• Make a Minor Mode
• (normal-erase-is-backspace-mode 0)
• (replace-regexp-in-string "five" "sixe" "A dice has five sides.")
• Implementing Comments in Major Mode
• mode example with faces
• regexp
• .mailrc
• C-u 2 M-x sort-numeric-fields RET
• (re-search-forward "^[a-z]" (point-max) nil)
• ELPA
• manual
• apropos-value
• dynamic scope
• external program to Emacs
• (setq initial-buffer-choice "~/todo.txt")
• (null (nth 8 (syntax-ppss)))
• CRLF (^M^J) -> LF (^J) with dos2unix or `C-x RET f unix'
• compilation-scroll-output
• emacs --batch file.txt --eval '(replace-regexp "^ " "")' -f save-buffer
• (set-display-table-slot standard-display-table 0 ?\ )
• eww
• capitalize
• cobol-mode(s).el
• get from Git; compile
• put it in MELPA
• history
• help-gnu-emacs
• ispell single word
• EmacsWiki
• SX
• help-gnu-emacs archive
• archives
• emacs-reddit
• Planet Emacslife
• Sacha Chua Emacs News
• help-gnu-emacs
• emacs-devel
• Dynamically-Loaded Modules

Gnus

• 20 Year Archive
• nnml, nnmbox, nnmaildir, etc.
• `J j' to toggle [un]plugged when [Undownloaded article]
• Article Washing ('g' - revert, 'W w' - wrap, 't' - toggle headers)
• Formatting Variables: %5= and %~(ignore \"0\")T
• src block
• NNTP (RFC 3977)
• (setq gnutls-min-prime-bits 1024)
• munpack -f MIME-mail # in mpack
• exiting
• (mail-decode-encoded-word-string "This is =?iso-8859-1?q?na=EFve,?= baby")
• tutorial
• hp
• (no) Gnus MLs

X

• xdotool key Control+Alt+F1
• setxkbmap -layout us # or se

Perl

• system('ls');
• substr
• like wc
• open(my $fh, "<", "in.txt") or die "Cannot open < in.txt: $!";
• comp.lang.perl.misc
• my $line = qx{cat ~/todo.txt | head -n 3};
• $ENV{"HOME"}
• if ($some_str ne "\n") { ... }
• perl -MPOSIX -le 'print INT_MAX'

mplayer

• ~/.mplayer/input.conf: 'u' runs "xdotool key Control+Alt+F1"
• irc.freenode.org#mplayer
• extract mp3
• -ass-color bbbbbb00 -ass-font-scale 1.3
• -subpos 100 -vf expand=0:-200:0:0
• mplayer -identify --frames=0 --vo=null -nosound FILE | grep LENGTH | cut -d '=' -f 2

Elisp

• C-M-n to "move forward over a parenthetical group"
• (setq current-prefix-arg '(4))
• (require 'cl) to use (labels ... )
• (insert (propertize "foo" 'font-lock-face '(:foreground "red")))
• (y-or-n-p "Do the thing? ")
• (time-subtract before (current-time))
• (file-exists-p "~/file.txt")
• (random limit) ; or (random)
• loops
  • dolist: break with (return r)
  • (dotimes (var times) do-what)
  • (while (> counter 0) ... (setq counter (1- counter)))
• (symbol-name 'some-symbol)
• byte-compile-file
• (measure-time ... )
• ;; -*-no-byte-compile: t; -*-
• (substring "abcd" 0 -1) -> "abc"
• (shell-command-to-string "/bin/echo hello")
• Unix epoch time - `float-time', then `format-seconds'
• no "empty-string-p" in Elisp, use (string= str "")
• (cl-some (lambda (e) (= e 1)) '(1 2 3)) ; t
• (make-string 3 ?x)
• Evolution of Emacs Lisp (2018)
• history
• Don't hashquote (#') lambdas
• (concat '(?h ?e ?l ?l ?o)) -> "hello"

tmux

• set-option -g message-bg black
• copy-mode
• bind-key -n C-1 select-pane -t 1

Internet

• TCP & UDP port numbers
• wget internet connection checker
• IP-address prefix syntax
• ASCII emoticons
• host stackoverflow.com # get IP
• RFC (EmacsWiki)
• The Internet Companion

zsh

• argument n: !:n
• last command: !# (or, !:0)
• RANDOM
• files=("${(@f)$(ls)}")
• array length: ${#array}
• some_array[expr]
• every argument but first: assign, 'shift'; and, $@
• exit status: $?
• string compare: if [[ "abc" == "def" ]]; then ... ; else ... ; fi
• return
• rm -f file no_file no_match*(N)
• (M-b) M-u to uppercase word (just typed word)
• zle -N upcase-previous
• bindkey ... upcase-previous
• lowercase: echo $uppercase:l
• setopt braceccl; echo {a-z}
• for p in {\[\] ...}; do { ... $p }; done
• setopt interactivecomments; echo works # yes!
• if [[ -e file ]] ... # exists
• highlighting
• listbots
• $* and $@
• ${${:-$string}[-1]} # last char in string
• abbrevs
• remove_prefix=${string#prefix}
• $! PID of most recent 'cmd &'
• array_of_lines=("${(@f)$(my_command)}")
• arrays
• exclude pattern: ls *~\#*\#
• file=file.txt; mv $file ${file:r} # file.txt -> file
• for p in *.pdf; do mv $p ${p// /_}; done
• echo ${1//the/THE} # global substitution
• (($+VAR)) # 1 if VAR set else 0
• ls *(.) # glob qualifier to match plain (text) files
• array=(e1 e2 ... eN) # then $array[1] is e1
• %~ in prompt string = all levels, with $HOME -> '~'
• ${(r:12:: :)word} # pad right
• echo hello hey !#:2 # hello hey hey
• setopt warn_create_global # warn when no local variable in function
• ${file:r}.${file:e}
• if [[ -x file ]]; then # executable
• pdfs+=($pdf) # append to array
• words=("${(@s/-/)string}") # delimiter: -; first word: words[1]
• local list=(a b c); echo ${foo[(i)a]} # index of list element a
• <-> # match digits only
• filename=${path/with/file:t}
• for ((i = 1; i < 10; i += 2)); do echo $i; done
• prog=$0; dir=${prog:A}
• array+=element
• mplayer *.mp3(oe:REPLY=\$RANDOM:)
• elements=(${(s:_:)string}) # split string on _
• **/*(.) # regular files (i.e., no dirs)
• f=$f[1,5] # slice array (N.B. _not_ elements!)

LaTeX

• mdframed
• \documentclass[oneside]{book}
• \usepackage[margin=0.5in]{geometry}
• \pagenumbering{gobble}
• tlmgr init-usertree
• \usepackage{alltt} ... \being{alltt} \input{file.txt} \end{alltt}
• do use \implies
• "logical and" is \land
• comp.text.tex, texhax, etc.
• \sum\nolimits_{...}
• \begin{array}{l c r} i1 & i2 & i3 \\ ... \end{array}
• \sum\nolimits_{\substack{ ... \\ ...}}
• \begin{enumerate}[label=\bfseries\arabic*] % from enumitem
• \addtocontents{toc}{\protect\enlargethispage{6cm}}
• \vspace{\baselineskip}
• \usepackage{enumitem} ... \begin{enumerate}[label=(\alph*)]
• \lstinputlisting[language=C++]{"/home/and-so-on/pointer_chase.cc"}
• \begin{longtable} ... \end{longtable} % get page breaks (explicitly with \newpage)
• \interfootnotelinepenalty=10000
• \def\textstring{Hello}
• Greek Alphabet
• \#
• \usepackage[backend=biber, style=ieee]{biblatex}
• empheq
• \colorbox{light-gray}{\parbox{0.67\linewidth}{...}}
• {\setlength{\fboxsep}{\baselineskip} % border of colorbox
• \usepackage{ragged2e} ... \justify
• \captionof{figure}{Caption for image} % sort of figure in minipage
• \usepackage[labelformat=empty]{caption} # no Figure 1 etc.
• \label{name} \ref{name}
• \newcommand{\vfrac}[2]{\ensuremath{\frac{#1}{#2}}} % two arguments
• \addtocounter{counter}{value} % and more counters...
• \index{sortme@\textbf{sortme}} % format index entries
• \usepackage[font=footnotesize]{idxlayout}
• makefile: compile twice, run, compile
• $\sim$ tilde (~)
• LaTeX symbols e.g. \rightarrow
• change \[sub[sub]]section{...} style
• Biblatex comments are the same as LaTeX's (single-line after %; no blocks)
• left \hfill center \hfill right
• \renewcommand{\thempfootnote}{\arabic{mpfootnote}}
• \setcounter{page}{3}
• \LaTeX
• \newpage\null\thispagestyle{empty}\newpage % blank page
• \thispagestyle{empty} # no page number

RT

• FpsCalc
• nxtOSEK installation
• POSIX.1b for Linux 2.2
• leJOS
• nxjupload
• download 64-bit nexttool

books

• ISBN
• publishing houses
• ISBN

Linux

• CPU
• memory, cache etc. tools
• ls -1 | wc -l
• `fbgrab vt.png' / `sudo cat /dev/vcs1 > vt.txt'
• convert -negate old.png new.png
• bunzip2 (.bz2)
• uname -m (kernel: x86_64 => 64-bit; i686 => 32-bit)
• df -h / # list free disk space
• runlevels and init (S/K) scripts
• top id = idle
• exiftool doc.pdf
• wvPDF from.doc to.pdf
• astronomy
• TMUX='' SHELL=tmux xterm -fullscreen
• cat text.txt | iconv -f ISO-8859-1 -t ASCII//TRANSLIT
• awk '{ sum += $1 } END { print sum }'
• Linux kernel is preemptive
• Distro Watch
• uname -r # kernel version (release)
• Openbox
• xinit -- vt6
• hex2dec () { echo $(($1)) } # supply e.g. 0x15a
• get-edid | parse-edid # from read-edid
• alias sudo='sudo '
• recode -f ascii utf8file.txt
• set PATH for sudo in /root/.zshrc
• df -i # count inodes
• lmbench
• par 55j < o.txt > n.txt
• 2>&1 | ...
• install xdark
• wget -r -nH --cur-dirs=2 -no-parent --reject="index.html*" http://host.dom/dir1/dir/
• allowed_users=anybody # user allowed to start X
• tar xJf fike.tar.xz # J deal with .xz's
• upgrade to sid: apt-get dist-upgrade ('apt-get -f install' on problems)
• aptitude B, d, etc.
• autologin tty systemd
• grep --exclude-dir='*' whatever **/*
• cgroups
• signals
• nice -n [-]ADJUST CMD
• USB temperature
• date +%s.%N # nanoseconds
• tty
• fdisk /dev/sdb
• readlink -e `type emacs`
• tty demystified
• translate-shell
• wc -L FILE # longest line
• kill -- -$GPID # kill children as well
• keycode 125 = Compose
• unbuffer ls -l --color=auto | tee output.log # keep color
• find /path/to/files* -mtime +5 -exec rm {} \;
• xrandr -x # flip
• NAutoVTs=3 # in /etc/systemd/logind.conf
• xprop ... # get win ID
• TZ="America/Los_Angeles" date
• tar bomb
• HP DIM upgrade
• sh: 0: getcwd() failed: No such file or directory # dir no longer exists
• sudo service ssh restart
• ps -Flww -p PID
• sudo chattr +i [/-i] i.txt
• [ ! -s file ] # zero size file

HTML

• &quot;
• frames
• <html lang="fr">
• ISO language codes
• robot tags

audio

• mp3splt -t 10.00 file.mp3
• arecord -f cd -t raw | lame -x -r - out.mp3
• Computer Chronicles
• abcde -o m4a # CD rip from /dev/cdrom
• mp3 as good as m4a only larger
• avconv -i in.mp4 -b:a 192K -vn out.mp3
• 3 CLI players

sport

• Studenternas (studan)
• Thomas Ravelli

Unicode

• FAQ

fs

• readlink -f file
• \ls -l # size in bytes
• [v]dir is ls ([-l]/-C) -b
• fdupes -r ./
• du -s
• find . -type f -name \*.cc -exec grep \<iostream\> {} \;
• find ./ -name \*~ -delete
• stat --format=%a FILE # get (octal) perms

make

• ?= assign iff undefined variable
• $< requirement; $@ target
• $(dir src/code.c)

programming

• build is compile and link

C++

• void exit(int status); // in <cstdlib>
• enum Enum_Type { a, b, c };
• this->a = a;
• std::ostream& operator<<(std::ostream& os, const T& obj)
• EXIT_FAILURE // <cstdlib>
• switch (e) { case c1: [case c1':] s; break; ... default: d; }
• gettimeofday(tv, NULL)
• NULL macro in <cstdlib>
• `this' is of type `[const] Class_Name *'
• enum class Color { RED, ..., BLUE }; // then Color::RED
• friend std::ostream& operator<<(std::ostream& os, T& t);
• NULL defined in <cstddef>
• ofstream f; f << "Hello file!\n"; f.close();
• std::string in <string>
• std::string s = std::to_string(number);
• strcmp // #include <cstring>
• do { // something } while (!condition); // do until
• f.open(path, std::ios_base::in);
• "static ..." in class, then "const type Class::name = data;"
• int char = getchar(); // getchar in <cstdio>
• in definition of static method, don't use "static"
• std::hex // and more
• typedef unsigned int uint;
• srand(time(NULL)); int i = rand() % 10 + 1;
• f.seekg(pos);
• std::getline(f, arg, ',');
• time_t now = time(NULL); // in <ctime>
• int num_of_elements = sizeof(str)/sizeof(str[0]);
• how to sleep for milliseconds
• static function visible to functions in the same file
• signal.h
• extern int global_int; // in header, then include and assign
• 'extern' in .hh: global var, defined in *one* .cc/.cpp file
• printf("Value: %llu\n", x);
• std::this_thread::sleep_until
• std::this_thread::sleep_for(std::chrono::nanoseconds(1));

files

• grep -v -f f1 f2 # or: sort -u f1 > sf1; ...; diff sf1 sf2

Debian

• main
• debian-user@lists.debian.org
• license
• sudo aptitude install linux-image-3.16-2-amd64 # upgrade kernel
• listbots
• on 64-bit machine, use amd64, not i386 (32-bit)
• Debian from CD/DVD/USB
• lsb_release -a # tell version
• live USB

C

• scanf("%d", &i); // in <stdio.h>
• apt-file search missing/header.h
• printf("%ld", n); // signed long
• fprintf(stderr, "Error message");
• ^ is XOR
• char greeting\[\] = "Hello!"; # array, size 7, ends with '\0'; modifiable
• system("/path/to/script"); // returns status code
• extern int global; // shared.h; int global = 1; // shared.c (one file!)
• /usr/include is managed; /usr/local/include not so

stardict

• dictionaries
• natural languages

aptitude

• downgrade
• aptitude search \~prequired -F"%p"
• "automatically (manually) installed"
• apt pinning

CLI

• sed "s#$HOME#~#g"

awk

• awk '{ print " ... '\'' ..." }' killed
• ... | awk 'p{print $0 - p} {p = $0}'

DVD

• dvd+rw-format -force /dev/cdrom
• wodim -v -dao dev=/dev/sr0 image.iso

git

• tree
• https://gitlab.com
• https://gitlab.com
• https://git-scm.com

RFC

• Hint: RFC 3676, section 4.3 (Usenet Signature Convention)

IRC

• modes codes
• RFC 1459
• /lastlog -file dump.txt
• /names
• commands
• ERC
• #bicycling@irc.snoonet.org:6667
• paste
• CTCP (DCC)

BibTeX

• @techreport
• type={\unskip\space}, @Comment don't show Tech. rep.

MIME

• types (text/x-c suitable .c etc.)

mail

• Google: most of mine, all of yours
• Gmane
• Content-Language: en (RFC 3282)
• socat - OPENSSL:pop.gmx.net:995 # check POP
• SPF, DKIM, DMARC
• more SPF, DKIM, DMARC
• DMARC
• DMARC and ietf.org

English

• What Do You Call a Group of...?
• Chris' Chris's both correct, boys' bedroom correct

PDF

• ebook-convert o.pdf i.epub # calibre
• pdfunite in-1.pdf in-2.pdf in-n.pdf out.pdf
• man -t ./hs.1 | ps2pdf - > hs.1.pdf
• convert xc:none -page A4 a4.pdf
• ebook-convert file.epub file.pdf # calibre
• ebook-convert file.docx file.pdf

Usenet

• FAQ

cgroups

• cgroups.txt

Google

• filetype:pdf how to geek

kernel

• download 3.17.1
• compile
• Intel SW docs
• Intel 64 SW manual
• freezer
• compile, insert/remove, listen to module
• compile, insert/remove, listen to module 2
• myTimer.c
• aptitude search linux-image # the kernel
• lsmod

Makefile

• make -C folder/path [clean]
• $< first prerequisite, $^ all ditto; $@ target
• %.png: %.dat: ... $*
• ifeq ... else ... endif

RSS

• (perhaps) interesting feeds

ImageMagick

• mogrify -negate img.png
• convert in-file.jpg -resize 640 out-file.jpg # height implicitly proportional
• convert in-file-1.jpg ... in-file-2.jpg +append out-file.jpg

ERC

• (setq erc-hide-list '("JOIN" "PART" "QUIT"))

math

• percentage error
• slide rule

USB

• sudo hdparm -r0 /dev/sdb # remove read-only

terminal

• colors

bike

• rec.bicycles.*
• Ashtabula
• remove OPC
• chain care
• chain stretch
• German coaster brake (Torpedo)
• chain 1
• chain 2
• Torpedo
• remove pedal
• Shimano Nexus 7-Speed Hubs
• 10*3/16" front 9*1/4" rear
• remove pedal
• wheelbuilding
• lock nuts
• items
• mill
• plastic bike
• angle grinder
• ISO 5775: 700x38C = 40-622
• roll-outs
• Shimano CN-HG40
• IRC channel
• chain
• tire
• tire 2
• is it aluminium or stainless steel?
• bar 1
• bar 2
• z盧恭fal faq
• Crescent Pepita
• Crescent Pepita
• Nervex lugs (UK)
• ASTM D2240, durometer rubber hardness
• rubber durometer hardness
• wheelbuilding
• CST
• kevlar-aramid
• stress&strain
• SAE
• SCO historie
• tire systems
• trim front derailleur
• why different size rotors rear and front
• frame size
• to be able to turn spacers is OK

misc

• bitsavers

computers

• jargon file

sound

• avconv -i i.wav o.mp3
• libsox-fmt-mp3 to play f.mp3
• decibel (dB)

video

• avconv -i IN -ss HH:MM:SS -c copy OUT
• avconv -i MUSIC -i VIDEO OUT
• MP4Box -cat i1.mp4 -cat i2.mp4 -new o.mp4

writing

• words(abstract) <= 200

ffmpeg

• ffmpeg -f concat -i SONGS -c copy NEW

Biblatex

• note = {Narrator: Stephan Karlsen}
• \renewcommand*{\bibfont}{\footnotesize}
• \printbibliography[heading=none]
• last-first

Everest

• 1996

movies

• 5th Element (1997) script

scripts

• The Matrix (1999)
• TFTM
• Chrono Trigger

gnuplot

• bar chart
• xtics
• key
• gnuplot-info

adventure

• Kropps ice bear
• Kropp
• skjutning
• Guillou
• Summit (2012)

computer

• 1985 HP keyboard

PHP

• $text = str_replace(' ', '_', $text);
• $ls_output = shell_exec('ls -lh');
• Put <!DOCTYPE HTML ...> as that is what browser sees
• rtrim($string);

tail

• tail -n +2 # start at 2nd line, i.e. drop 1st

GMT

• gmt-user

RPi

• swap file
• hardware
• tzselect # or, in .zprofile: export TZ='Europe/Stockholm'
• Wheezy -> Jessie
• sudo systemctl set-default multi-user.target # don't boot into X
• download Raspbian

systemd

• NAutoVTs=6 # in /etc/systemd/logind.conf
• autologin to tty2 etc
• autologin tty2, again

Gmane

• main

verkstan

• kontakt

CUPS

• splix supported printers

acestream

• start.py

Lisp

• jobs
• IRC channels
• LISP Programmer's Manual
• CLTL
• Elisp implicit `progn' in `if' (?)
• RMS on Elisp

boat

• screw holes

youtube-dl

• sudo pip install --upgrade youtube-dl

Cobol

• cobc -x hello-world

binocular

• numbers, terminology

ISO

• country codes

tools

• adjustable spanner, England 1842

SLIME

• SLIME

survivalism

• drink rain water

mech

• brushless motor power tools

actic

• bl
• cb
• kk
• sd

temperatur

• Uppsala

wood

• buy lumber

tree

• trim

xterm

• font path

ryobi

• Lithium 18V FAQ

brain

• brain fog

gfx

• convert image -trim +repage result
• convert -resize 640x480 in.jpg out.jpg

print

• lpr [-o landscape] -o fit-to-page img.png # or text, PDF, PS, JPG, BMP & GIF

moasen

• humidifier

Survivor

• Ghost Island cast
• Australia
• TPB proxy

Lego

• ev3dev
• docker
• C

ssh

• RSA w/o password

apt

• /etc/apt/sources.list syntax
• sudo aptitude install PACK # when apt-get says broken

flashlight

• ANSI FL1
• Candela vs Lux vs Lumens
• What does Lux, Candela and Lumen mean?

Raspbian

• Jessie -> Stretch

TV

• text-TV
• på TV

sed

• sed -n 2p file.txt # print 2nd line only
• sed 'LINEw output.txt' input.txt
• OR: \(...\|...\)
• remove color codes: sed -r "s/\x1B\[([0-9]{1,2}(;[0-9]{1,2})?)?[m|K]//g"
• sed -n '/start/,/end/p' file
• sed -e 's/^[ \t]*//' # drop initial whitespace
• egrep '<title>.*</title>' | sed 's/\(<title>\|<\/title>\)//g' # get HTML tag payload
• cat text | sed 's/^$/<\/p>\n<p>' # substitute blank lines

UU

• Unix-inloggning

Tor

• install

piller

• Benzo Equivalency

swamp

• dataswamp.org
• john
• lich
• quag7
• rich
• romanzolotarev
• sin
• solene
• thomas
• incal
• cyberia

OpenBSD

• BSD tree
• history

comics

• Star Wars TPBs

GNU

• MLs
• MLs 2

UNIX

• K&T talk