This document contains a collection of notes on various programming topics including: - Commands for Unix shells like grep, sed, awk, and tools like OpenSSL and factor. - Examples of using pipes, redirection, and commands together in sequences. - Brief mentions of other topics like Excel, LaTeX, gnuplot, and programming languages like Perl, Python, and C. - Links to blog posts and resources about Unix tools, Emacs, Vim, and Shell scripting jokes and tutorials.

1. — :(){:|:&};: —

2. • Twitter @obknnt
• ※TL Twitter
• http://blueeyes.sakura.ne.jp/
•
•
• Vim Vim Vim
• EMACS Makes Any Computer Slow
*
• Sublime Text
• Emacs Atom
$ whoami

3. • PSoC ( )
• CPLD with ARM
• MSP430 (Texas Instruments)
• RX Mac or Linux
• I2CLCD
• GCC Mac

4. Index
•
•
•
•
•
•
•
•
•
•
•

5. •
•
•
• QoL
• Micr○ $○ft
•
• ※

7. •
GUI
CLI
• gcc echo gcc -xc - (
)
•
• OK

8. OS: macOS Sierra (MacBook Air Early 2014)
Terminal: iTerm2
Shell: Zsh 5.4.1 with GNU coreutils
: https://github.com/shima-529/
dotfiles/
※ Windows 10 Bash on Ubuntu on Windows (
)

9. •
• - echo
• - python
• - bc
• - sed, tr
• - factor
• - awk, perl
• …

10. • (standard I/O)
• C stdio.h
• (stderr)
•
• | (Shift + )
•
•
• 1 ( n)
•

11. 1. 1 100
2. file00 file99 .yjsnpi
3. 5, 6, 3, 10, 1
4. 1, 5, 3, 6, 9, 0, 1, 4, 2, 5
5. ( )
6. 1 100000 1

12. 7. hoge()
main
#include <stdio.h>
#include <string.h>
int main(void){
hoge("NULL");
return 0;
}
void hoge(const char *str) {
if( strcmp(str, "NULL") == 0 ) {
printf("NULL NULL n");
}else{
for(int i=0; i<strlen(str); i++) {
printf("%c ", str[i]);
}
}
}

13. 8. echo
(
)

14. 1. seq 1 100 | factor | awk 'NF==2{print $2}' |
xargs
2. touch file{00..99};
find . | xargs -n1 basename | sed -n 's/^.*$/mv &
&.yjsnpi/e'
3. cat graph | awk '{printf $0 ": ";for(i=0; i<$0;
i++){printf "*"}printf "n"}'
4. echo "1n5n3n6n9n0n1n4n2n5" | sort -n |
uniq -d
5. seq 1 $(tput cols) | awk
'{a=22*(1+sin($1/30));system(sprintf("tput cup %d
%d", a, $1-1));printf "*"}
END{system("clear;sleep 1")}'
6. seq 1 100000 | shuf >data #
cat data | sort -nr #

15. 7. sed '/main/,/^}/{H;d};$G' hoge.c
Vim ※
vim -es hoge.c +':norm gg}d}Gp' +%p +q!
8. echo | sed -r -ne'p;s/(.)(.*)/
21/#'{1..10}
ド
※) Vim vimshell (https://togetter.com/li/1080646)

16. (1)
• grep:
• grep -o:
• grep -o . :
• xargs:
• eval:
• sort:
• uniq: 1
• seq: seq inf
• yes:
• yes :
• yes 5 :

17. (2)
• cat:
• tac:
• rev:
• paste:
• openssl prime: 10
• openssl prime -hex: 16 (0x )
• factor: 10
• nkf:
• wc: ( n )
• wc -l :
• wc -c :
• base64: ==
• file - :

18. •
• Excel
• Excel
• gnuplot
• csv LaTeX
• LaTeX gnuplot Micr○ $○ft

19. • (OS)
• 1
• 24
• root
•
•
Docker
※

20.
• echo > /etc/passwd
• :(){:|:&};:
• rm tmp /* */
• echo 'exec sl' > ~/.bashrc
• echo {0000000000..9999999999}
• alias emacs='vim' alias emacs='rm -rf /' sudo ln -s $
(which emacs) $(dirname $(which emacs))/vim
• alias eval='eval eval'; eval
• sudo apt-get remove glibc

21. • H4sICBmZ4lcAA2VsZgCrd/
VxY2RkZIABJgZmBhAvMcBEyIQBAUwYFBhgquCqgWpAVDMUs4I4AgwMjxvbHjdNftw
4mQuodgcLUHA3SMvOEKD6XbxA1tmGHSCB3QxgNgCMjcoWgwAAAA==
• 32bit ELF
• 140 (Twitter )
• eval eval ''n='''{1..'$(dc -e 1000vp)'}''' eval eval eval echo
'''''''$(('''''''$n''
'''''*''''''''{2..$
((1000/n))}''''''''))'''
'''';'' | tr ' ' n | sort -n | uniq -u
• 1000
• l='L${r}FR${l}F${l}RF${r}L' r='R${l}FL${r}F${r}LF${l}R' eval eval
eval eval eval eval l= r= eval echo '$l' | { read a; b=${a%%F*};
echo "from turtle import
*;speed(0);pensize(2);ms=min(screensize())*0.8;l=2*ms/(2**$
{#b}-1);up();setpos(-ms,-ms);down();${a}done()"; } | sed 's/L/
lt(90);/g;s/R/rt(90);/g;s/F/fd(l);/g' | python
• ( )
•

22. • man
• awk man awk
• – (https://
blog.ueda.tech/?page_id=684)
• 29 Perl ( 1 ) (https://
umidori.github.io/shellgei-29th-am/)
• 30 Perl ( 2 ) (https://
umidori.github.io/shellgei-30th-am/)
• (https://orebibou.com/)
•
- (http://d.hatena.ne.jp/m-hiyama/
20071221/1198221671)
•

23. • Software Design 2017 1 30
et al
• AWK
•

24. •
• 30
•
• 30 20
• 27 sed
• https://blog.ueda.tech/?p=9283
• 1
•
•
• 20

25. • super_unko
- Togetter
(https://togetter.com/li/1145304)
• ( )
• Raspberry Pi
• on Python
•

26. • GNU Emacs acronym expansions (https://www.gnu.org/fun/jokes/
gnuemacs.acro.exp.html)
• Ver. 1.1 – (https://
blog.ueda.tech/?page_id=1434)
• Vim vimshell
- Togetter (https://togetter.com/li/1080646)
• SHELQ: – (https://
blog.ueda.tech/?p=8862)
• https://steers.jp/c/forkbomb_navy
• T

27. May you have a happy
ShellGei life!!
Now, we can
:(){:|:&};:
in production!!