Vigenère cipher in pure bash

2008-05-04T18:35:00.005Z

#!/usr/local/bin/bash # vigenere.sh # http://en.wikipedia.org/wiki/Vigen%C3%A8re_cipher a="ABCDEFGHIJKLMNOPQRSTUVWXYZ" [[ "${*/-d/}" != "" ]] && echo "Usage: $0 [-d]" && exit 1 m=${1:+-} printf "string: ";read t printf "keyphrase: ";read -s k printf "\n" for ((i=0;i<${#t};i++)); do p1=${a%%${t:$i:1}*} p2=${a%%${k:$((i%${#k})):1}*} d="${d}${a:$(((${#p1}${m:-+}${#p2})%${#a})):1}" done echo "$d"

find fastest mirror

2007-10-15T06:03:00.002Z

#!/bin/bash # ffmirror.sh # find fastest mirror (?!?) # give it a list of hosts and it will sort them # according to their response time # no switches (ATM) just ./ffmirror

Calculate check digit for EAN-13 barcodes

2007-07-02T12:09:00.001Z

[inode@brio ~]$ cat chkdigit.sh #!/usr/local/bin/bash # http://en.wikipedia.org/wiki/European_Article_Number oe="13" while read line; do for (( j=0; j<${#line}; j++ )); do chk=$((chk+${line:$j:1}*${oe:$j%2:1})) done [[ $((chk%10)) == 0 ]] && digit=0 || digit=$((10-chk%10)) chk=0 echo ${line}${digit} done [inode@brio ~]$ cat barcodes.txt 068886641760 200020400298 200020400303 200020400323

cleansh!t

2007-05-07T20:33:00.001Z

#!/bin/bash # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # Clean Sh!t v0.1 # # # # # # # # # # # # # # # # # # # # # # Date: '20070506'# # # # # # # # # # # # # # # # # # # # # # j00 @r3 ! fr33 to c0py my c0d3! # # # # # # # # a="5422437\ ";b="while\ readl;doec\ ho\$l;done\ <\$0";d=0;\ for ((i=0;\ i<${#a};i+\ +));do c[$\ i]=${b:$d:\ ${a:$i:1}}\ ;d=$((d+${\ a:$i:1}));\

Generate Morse Code from ASCII

2006-03-16T00:36:00.001Z

The Morse code, named after its inventor Samuel Morse, was used for long distance communication. It is largely believed that it is now obsolete, yet some prisoners still find it useful. (banging a shoe on a pipe) Learn more about it at Wikipedia. Anyway here is the script #!/bin/bash # morse.sh - generate morse code from ascii # you can contact me at: # --. .-. ..- .-.. --- ... .--.-. --. -- .-

HTTP authentication, base64 encoding

2006-03-11T11:03:00.001Z

In the previous post dyndee.sh - dyndns update client, I faced a problem: I had to authenticate to dyndns.org but didn't want to use lynx, links or any other external tool. For HTTP authentication to work I need to base64 encode the string "username:password" I will try to explain each step. First I had to get the decimal value of each character of the string. I couldn't find any function to

dyndee.sh - dyndns update client

2006-02-27T16:47:00.001Z

Just a minimalistic dyndns.org update client written entirely in bash. The only requirement is that bash should be compiled with --enable-net-redirections which on many systems is by default. It gets the ip from http://metawire.org/~inode/ip.php which is a simple It can be modified to use others such as checkip.dyndns.org If you find any bug or have any

substrings, brace expansion, sequence expressions

2006-02-25T02:21:00.001Z

Let's say you have a set of files in a directory named like exp1eve1.txt exp1eve2.txt exp1eve3.txt exp1eve4.txt and you want to change the exp1 part to exp2 so they become exp2eve1.txt exp2eve2.txt ... There are so many ways to do the job. Using substring expansion one could do #!/bin/bash for i in exp1eve*.txt; do mv "$i" "${i:0:3}2${i:4:$((${#i}-3))}" done How does the substring expansion

ebook: The Complete FreeBSD released!

2006-02-24T06:59:00.001Z

Greg Lehey, a kernel hacker specializing in BSD UNIX, decided to release his book "The Complete FreeBSD" under the Creative Commons Attribution-NonCommercial-ShareAlike 2.5 license. From TOC: 1. Introduction 2. Before you install 3. Quick installation 4. Shared OS intallation 5. Installing FreeBSD 6. Post-installation configuration 7. The tools of the trade 8. Taking control 9. The Ports

Microsoft: How to Remove Linux and Install Windows XP

2006-02-21T16:18:00.001Z

No free space left for MS Windows? "This article explains how to remove the Linux operating system from your computer and install Windows XP. This article assumes that Linux is already installed on your computer's hard disk, that Linux native and Linux swap partitions are in use (which are incompatible with Windows XP), and that there is no free space left on the hard disk." priceless..

BASH_REMATCH, regular expressions

2006-02-21T08:37:00.001Z

Since version 3, bash has an additional binary operator `=~' which is able to handle regular expressions. Every substring which is matched by the subexpression which is in parenthesis can be accessed from the BASH_REMATCH variable. Here is a small script i use to get the latest freshmeat releases #!/bin/bash exec 4<>/dev/tcp/rss.freshmeat.net/80 printf "%s\n" "GET /freshmeat/feeds/

changed blog template

2006-02-16T22:03:00.000Z

I changed the design a bit. I hope you like it. It looks ok on firefox, konqueror, lynx, links. If you have some other browser and if you are kind enough to send in some feedback, please do so :)

rarcrack.sh: crack those rar files

2006-02-14T02:51:00.000Z

There are times when you just "forget" that rar passwordfirst get unrar from http://www.rarlab.com/rar/unrarsrc-3.3.4.tar.gzand the scriptjust change wordlist and unrar paths and run it./rarcrack file.rar#!/bin/bashwordfile=/usr/share/dict/wordsxrar=/usr/bin/unrar[ -x "$xrar" ] || exit 1[ -r "$wordfile" ] || exit 1[ -r "$1" ] || exit 1trap 'printf "\n%s\n" "caught signal" && exit 1' 2try=('|' '/'

Amazon sells Linux OS as DOS

2006-02-07T23:06:00.000Z

Well Slackware 3.6 (released in 1998) is a bit old. There is nothing wrong with selling some old distro. 10 quid is a bit too much, but what the heck.. it comes in a nice package. So i guess that's ok too.JUST DON'T SELL SLACKWARE AS DOSI guess their point of view is: Linux->command line->DOSSo there you go "Platform: DOS"click on the image to see for yourself

shell script: getmillist.sh: get that milw0rm wordlist

2006-02-06T12:15:00.000Z

*edit* 20060226 This script is useless.Thanks to Rob for mentioning it, you can get the updated list of cracked hashes directly from milw0rmjust an ugly hack to get that milw0rm listno need to run it again.. grab the list here#!/bin/bashecho "lets get that milw0rm list :)"for ((i=8990; 0 < i; i=i-30)) do links -dump "http://www.milw0rm.org/md5/list.php?start=$i"| grep cracked|while read -a

shell tip: dealing with weird filenames

2006-02-06T03:37:00.000Z

I know its frustrating. Thank god there is the end of options list.-bash-3.00$ cd -=test=- # nope-bash: cd: -=: invalid optioncd: usage: cd [-L|-P] [dir]-bash-3.00$ cd "-=test=-" # nope-bash: cd: -=: invalid optioncd: usage: cd [-L|-P] [dir]-bash-3.00$ cd '-=test=-' # nope-bash: cd: -=: invalid optioncd: usage: cd [-L|-P] [dir]-bash-3.00$ cd \-\=test\=\-

script: massping.sh: mass ping scanner

2006-02-02T09:35:00.000Z

pretty fasti know.. some ranges are not valid. More checking needs to be done#!/bin/bash## ./shping.sh 192.168.0.1-150function usage() { echo "usage example: $0 192.168.0.1-100" exit 1}IFS='.'iprange=($@) # 192 168 0 1-100IFS=$'\040\t\n' # printf "$IFS"|hexdump -bcsrange=${iprange[3]/%-*/} # 1erange=${iprange[3]/#*-/} # 100j=0# Do some checking[ "$#" == "1" ]

script: expect.sh: using bash instead of expect

2006-02-02T09:07:00.000Z

because i hate expect scriptingtry this:#!/bin/bashexpect=("hi" "white" "in")reply=("hello" "black" "out")while read -n1 "char"; do word="$word$char" [ "$word" == "${expect[$count]:0:${#word}}" ] || word="$char" if [ "$word" == "${expect[$count]}" ]; then printf "\n${reply[$count]}\n" (( count++ )) [ "$count" == "${#expect[@]}" ] && break word=""

script: uptime.sh: get uptime from /proc/uptime

2006-01-31T19:47:00.000Z

Just a simple script to get uptime from /proc/uptime (which is in seconds)#!/bin/bash# uptime.sh# get uptime from /proc/uptimeuptime=$(</proc/uptime)uptime=${uptime%%.*}seconds=$(( uptime%60 ))minutes=$(( uptime/60%60 ))hours=$(( uptime/60/60%24 ))days=$(( uptime/60/60/24 ))echo "$days days, $hours hours, $minutes minutes, $seconds seconds"Ofcourse in the same way you could add months, years,

script: renumdir.sh: rename dirs to sequentially numbered ones

2006-01-29T14:21:00.000Z

#!/bin/bash## renumdir.sh: renames dirs to sequentially# numbered ones starting from 00001 # ex. 00001 00002 00003 00004 etc.## questions? suggestions? comments?# grulosΨgmail.com#cd $1 || exit 1typeset -a files=(*)typeset -i j=1for i in "${files[@]}"; do if [ -d "$i" ]; then # infinite loop until we find the next # numbered dir we are going to use while true; do fname=0000$j;

shell tip: echo * and printf

2006-01-29T00:55:00.000Z

~$ mkdir testdir~$ cd testdir~/testdir$ touch -- -e \\141~/testdir$ ls-e \\141~/testdir$ echo *a~/testdir$ note i used '--' with touch so '-e' would not be used as an option.So what happened here?-e was passed to echo as an option. echo * becomes echo '-e' '\141' which interpreted correctly the \141 escape sequence as 'a'If you're going to use * be careful. Avoid echo try printf.In this case: ~/

shell tip: get parts of a filename

2006-01-28T22:31:00.000Z

# works in bash, zsh and ksh93~$ f=file.tar.bz2~$ echo "${f##*.}"bz2~$ echo "${f#*.}"tar.bz2~$ echo "${f%.*}"file.tar~$ echo "${f%%.*}"file

shell tip: var of var

2006-01-27T18:36:00.000Z

~$ a=1~$ b=a~$ echo $((b))1

password cracker John the Ripper v1.7 released

2006-01-27T04:22:00.000Z

http://www.openwall.com/john/~/john-1.7/doc$ cat CHANGESThe following major changes have been made since John 1.6:* Bitslice DES code for x86 with MMX: more than twice faster than oldernon-bitslice MMX code.* Bitsliced the LM hash code as well: now several times faster.* Significant improvements to the generic bitslice DES code: +20% on RISC.* PowerPC G4+ AltiVec support (Mac OS X and Linux):

GPL v3, Linus Torvalds "Conversion isn't going to happen."

2006-01-27T03:55:00.000Z

"The Linux kernel is under the GPL version 2. Not anything else. Someindividual files are licenceable under v3, but not the kernel in general.""And quite frankly, I don't see that changing. I think it's insane torequire people to make their private signing keys available, for example.I wouldn't do it. So I don't think the GPL v3 conversion is going tohappen for the kernel, since I personally

Why save $IFS to OIFS ?

2006-01-12T02:05:00.000Z

A lot of people seem to get confused just because $IFS contains non printing characters. Many suggest that before changing IFS (while using a modern shell) it should be saved in a variable such as OIFS. Others suggest going into a subshell so the original IFS won'be changed. Looking at IFS as it is by default on my system it's just space tab and newline~$ echo -En "$IFS"|hexdump -bc0000000 040

1 pixel for $1.000.001 --a true bargain

2006-01-11T01:22:00.000Z

No it's not a dead pixel dummy. It's the new trend everyone is talking about. It seems that everyone is gone crazy selling pixels. So here you go I bet I can make more than a million a lot faster and a lot easier than Alex Tew.The pixel has a hex value of "#ffff33"Believe me this pixel will remain in history. (once you buy it)

free shell with all the bells and whistles

2006-01-09T08:09:00.000Z

metawire.org --I've been there for over a yearSome of the things that might interest you:OS: OpenBSDquota: 25MBprogramming/scripting: gas, gcc, perl, python, rubyshells: sh, csh, ksh, bash, zsh, tcshirc: epic, BitchX, irssiicq: centericqmail: pine, muttwww: php, postgresqlweb: lynx, linkseditors: vi, emacs, picoand that's just for users1. After a few months of 'good behavior', being a positive

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