Free advanced bash scripting guide 5.0 software for linux

This tutorial assumes no previous knowledge of scripting or programming, but progresses rapidly toward an intermediate/advanced level of instruction . . . all the while sneaking in little snippets of UNIX wisdom and lore.
Advanced Bash Scripting Guide serves as a textbook, a manual for self-study, and a reference and source of knowledge on shell scripting techniques.
The exercises and heavily-commented examples invite active reader participation, under the premise that the only way to really learn scripting is to write scripts.
Enhancements:
- This release adds a cross-linked index (the final missing critical feature in this project), other new material (including a new appendix and a couple of new example scripts), and bugfixes.
- This is an important update.

Adams Ripsuite is a collection of quick and dirty Perl and bash scripts to help rip CDs and manage a music collection. The project rips music video DVDs and music CDs to files on your hard drive.

Reads track information in from a file on disk. Transcodes music files from and to a variety of formats using mplayer/lame/libogg. Specify an artist name to have their back catalogue copied to a folder.

Corrects the case of artist names/song titles for all music files/folders of music files. Adds artist information to files ripped with song title only. Does not support CDDB lookups for track information.

Requirements: Perl

Bash Port Knocking is a set of scripts that use standard Linux tools to acheive a port knocking system. A Web page is used to open ports, and an email is sent every time the port knocking sequence is successfully made.
Main features:
- Uses custom scripts to begin firewall and ipmasquerade for multiple connections. This can be used as a gateway for ethernet provided Internet Connectivity in addition to supplying port knocking services.
- This script creates a web page that can be used for port knocking. This page can be used locally if the browser is using a public/anonymous proxy.
- This scripts emails the above created browser page to a specified email recipient each time the port knock sequence is successfully acheived.
- This script logs successful port knocks but denies knocks that hit a port designed in the initial scripts. This allows the script to be closed automatically if someone is hitting your computer repeatedly trying to automatically open the ports and allows you to close the ports if youve completed a log in or other desired action.
- In its current state it has run successfully for quite some time and been tested repeatedly with both anonymous proxy and remotely by the author for opening ssh.
- It allows the user to control the depth of the logs searched to function in a very low usage enviornment or a very high use enviornment as desired.
- It sorts the knocks by knocking address to prevent possible denial of service.

Intro to Bash Programming HOWTO is a bash programming tutorial.
The Intro to Bash Programming HOWTO is meant for newbies who wish to learn how to write shell scripts for bash, the GNU Boure-Again shell.
It contains several samples. It is very early in its development, but it is hoped that some people might find it useful.
Enhancements:
- New translations included and minor correcitons.

IPv6 FireWall script is a firewall based on ip6tables.

firewall6.sh 122 lines

#!/bin/bash

# Basic IPv6 FireWall script by Dennis Kruyt (dennis@klingon.nl)
#
# Sun Jan 5 18:26:28 2003 - DK

#debug
#set -x

cd /opt/scripts/firewall

source ./config6
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/bin/X11

# change to script directory
cd ${SCRIPTSDIR}

SCRIPT=${SCRIPTSDIR}/firewall6.sh

case "$1" in
flush)
echo -e "Starting Firewall:"
${IPTABLE6} -F >> /dev/null 2>&1
${IPTABLE6} -X >> /dev/null 2>&1
echo -e "Setting defaults op ACCEPT!"
echo -e "ALERT: no firewall rules active"
#
${IPTABLE6} -P INPUT ACCEPT
${IPTABLE6} -P OUTPUT ACCEPT
${IPTABLE6} -P FORWARD ACCEPT
;;
start|reload)
echo -n "Starting Firewall: "
# paging!
#

# create a backup
TIME=`date +%s`
tar -czf /opt/backups/firewall/firewall.${TIME}.tar.gz /opt/scripts/firewall

# sending mail
mail email@address.com -s "Firewall - (re)started" < $0

# wait
sleep 1

# kerneloptions
echo -n "Loading Kernel options.."
./kernel_options6.sh

echo -n "Flushing and deleting all chains.."
${IPTABLE6} -F >> /dev/null 2>&1
${IPTABLE6} -X >> /dev/null 2>&1

# default policy
echo -n "Setting default policy DROP.."
${IPTABLE6} -P INPUT DROP
${IPTABLE6} -P OUTPUT DROP
${IPTABLE6} -P FORWARD DROP

# ?????????????
#${IPTABLE} -F -t mangle
#${IPTABLE} -t mangle -X

echo -e "Loading chains.."
# create chain blacklist
${IPTABLE6} --new blacklist
#And drop the evil ones
for i in $BLACKLIST6;do
${IPTABLE6} -A blacklist --src $i -j DROP
done

#icmp chain
${IPTABLE6} --new icmprules
${IPTABLE6} -A icmprules -p icmpv6 -j ACCEPT

# create out chain
${IPTABLE6} --new out
#localhost to localhost
${IPTABLE6} -A out --src $LOCALHOST6 --dst $LOCALHOST6 -j ACCEPT
# for now accept all outgoing IPv6 traffic
${IPTABLE6} -A out --src $SIXXS --dst $ANY6 -j ACCEPT

# create in chain
${IPTABLE6} --new in
#localhost to localhost
${IPTABLE6} -A in --src $LOCALHOST6 --dst $LOCALHOST6 -j ACCEPT
# for now accept all incomming IPv6 traffic
${IPTABLE6} -A in --dst $SIXXS --src $ANY6 -j ACCEPT

#All that are in trusted may ssh
for i in $THRUSTED6;do
${IPTABLE6} -A in -p tcp --dst $SIXXS --dport 22 --src $i -j ACCEPT
done

# jump to all ipv6 chains
${IPTABLE6} -A INPUT -j blacklist
${IPTABLE6} -A OUTPUT -j blacklist
${IPTABLE6} -A FORWARD -j blacklist

${IPTABLE6} -A INPUT -j icmprules
${IPTABLE6} -A OUTPUT -j icmprules

${IPTABLE6} -A INPUT -j in
${IPTABLE6} -A OUTPUT -j out

;;
show)
echo -e "Rules in the firewall: ${CHAIN} n"
${IPTABLE6} -L -n
;;
*)
echo -e "Usage: ${SCRIPT} {flush|start|reload|show} n"
exit 1
;;
esac
exit 0

config6 12 lines

export IPTABLE6=/sbin/ip6tables

export SCRIPTSDIR=/opt/scripts/firewall

export EXT="eth0" # device
export SIXXS="3ffe:8114:1000::50f/127" # extern

export ANY6="::/0"
export LOCALHOST6="::1/128"

export THRUSTED6=""

export BLACKLIST6="3ffe:8114:2fff:1391::1"

kernel_options6.sh 7 lines

#!/bin/bash


# forwarding on
#echo "1" > /proc/sys/net/ipv6 blablabla

# Set some other IPv6 proc settings
#echo "1" > /proc/sys/net/ipv6 blablabla

Sambascan2 is a small bash-script, which can scan for SMB-shares in a given Netz.
The project currently needs nmap, find, smbclient, sed and grep. If you know a less agressive way for scanning on port 139, please tell me, because I thing nmap is not so polite.
sambascan2 was only written to scan in public shares and not in private ones (this may change with the time).
It is possible, that the Share have a directory with other permissions than the one needed to access it. Check the permission of the wanted directory, and if Samba can access it as the public user.
Enhancements:
- This version adds the ability to scan password protected shares, using known logins and passwords for the host being scanned.

Bash Debugger project contains patched sources to BASH that enable better debugging support as well as improved error reporting.
In addition, this project contains the most comprehensive source-code debugger for bash that has been written.
Since this project maintains as an open CVS development and encourages developers and ideas, the space could be also be used springboard for other experiments and additions to BASH.
Enhancements:
- This release adds a gdb-like "load" command to force reading in a file.
- Files coming from function line-specifications are now read in (Debian Bug #40336).
- Negative numbers are now allowed in "frame" (and "up" and "down") commands.
- Help, manual page, and documentation fixes have been made, including suggested use of $PS4.