Chris Vasiladiotis compor

## bash_get_ethernet_if_name.sh
ifconfig -a | grep -i "link[ ]*encap[ ]*:[ ]*ethernet" | awk 'BEGIN{ iface="z" }
{ if( $1 ~ /^eth/ && iface > $1 ) iface=$1 }
END{ print iface }'

## bash_create_multiple_screen_sessions.sh
#!/bin/bash

#
# it starts multiple screen session whose usual task is remote ssh over
# a line separated list of IP's
# session_name : the prefix of the name of the screen sessions
# script_name : implements the remote ssh code e.g. with python's paramiko
# input_file_prefix : the prefix of the files for the script to process
# iterations : the number of input files which is equivalent to the screen sessions to be spawned (indexing is zero-based)
#

## bash_x11_fwd_enable_disable.sh
#!/bin/bash

SSHD_CONFIG=/etc/ssh/sshd_config
SSH_SVC=/etc/init.d/sshd

v=`grep -m 1 -e "X11Forwarding" ${SSHD_CONFIG} | awk '{ if( $0 ~ /^#/ ) print "no"; else print $2; }'`

enabled=0;

if [ ${v} == 'yes' ]; then

## bash_tcp_retransmission_checker.sh
# the capture file should be filtered in order to contain
# 1] the source address of the host for which we are checking the re-transmission mechanism for
# 2] and the destination should be any number of target hosts we are interested in
# 3] we only need the retransmitted packets (apply appropriate filter)
# 4] the capture file to be processed should be exported in text format with as much verbose info as possible

# script 1
# splits the capture in separate files (using a specific prefix) each containing a separate re-transmission stream - identified by the same destination IP and the same TCP sequence port

#!/bin/bash

## bash_dir_name_cleanup.sh
# 1] convert all to lowercase letters

convmv --lower --notest *


# 2] remove naming defects such as :
#    a] consecutive spaces
#    b] weird characters like commas, parentheses, underscores, etc

## bash_convert_delicious_tags.sh
# delicious decided (out of nowhere) to change its tag separator from whitespace to comma,
# but since it didn't update it's browser plugin, i ended up with messed up multi-word tags
# here's my quick solution to fix that mess :
#
# 1] export all your delicious tags to a html file e.g. delicious.html
# 2] execute the below awk script to the exported file


BEGIN{ FS = "=" }
{

## bash_route_blackhole.sh
# network route that goes nowhere - blackhole filtering

# 1] available to almost every host implementing the ip module
# 2] almost 0 performance impact
# 3] can sustain higher throughput than conventional firewalls

route add -host 192.168.1.1 reject

## bash_trap_control.sh
#!/bin/bash
# http://hacktux.com/bash/control/c

cleanup()
# example cleanup function
{
  rm -f /tmp/tempfile
  return $?
}


## bash_add_delete_crontab_entry.sh
#!/bin/bash

# it can add/delete multiple times the same crontab entry
# without having to worry for duplicate entries (in case of adding)
# or any leftovers (in case of deleting)


# THIS KEY HAS TO BE UNIQUE IN THE ENTRY TO BE ADDED/DELETED
CMD_KEY="moo"

## session_spawner.py
#!/usr/bin/env python

import sys
import os
import traceback
from optparse import Option, OptionParser, OptionGroup

version_string = "\n\
%prog\n"
	ifconfig -a \| grep -i "link[ ]encap[ ]:[ ]*ethernet" \| awk 'BEGIN{ iface="z" }
	{ if( $1 ~ /^eth/ && iface > $1 ) iface=$1 }
	END{ print iface }'
	#!/bin/bash

	#
	# it starts multiple screen session whose usual task is remote ssh over
	# a line separated list of IP's
	# session_name : the prefix of the name of the screen sessions
	# script_name : implements the remote ssh code e.g. with python's paramiko
	# input_file_prefix : the prefix of the files for the script to process
	# iterations : the number of input files which is equivalent to the screen sessions to be spawned (indexing is zero-based)
	#
	#!/bin/bash

	SSHD_CONFIG=/etc/ssh/sshd_config
	SSH_SVC=/etc/init.d/sshd

	v=`grep -m 1 -e "X11Forwarding" ${SSHD_CONFIG} \| awk '{ if( $0 ~ /^#/ ) print "no"; else print $2; }'`

	enabled=0;

	if [ ${v} == 'yes' ]; then
	# the capture file should be filtered in order to contain
	# 1] the source address of the host for which we are checking the re-transmission mechanism for
	# 2] and the destination should be any number of target hosts we are interested in
	# 3] we only need the retransmitted packets (apply appropriate filter)
	# 4] the capture file to be processed should be exported in text format with as much verbose info as possible

	# script 1
	# splits the capture in separate files (using a specific prefix) each containing a separate re-transmission stream - identified by the same destination IP and the same TCP sequence port

	#!/bin/bash
	# 1] convert all to lowercase letters

	convmv --lower --notest *



	# 2] remove naming defects such as :
	# a] consecutive spaces
	# b] weird characters like commas, parentheses, underscores, etc
	# delicious decided (out of nowhere) to change its tag separator from whitespace to comma,
	# but since it didn't update it's browser plugin, i ended up with messed up multi-word tags
	# here's my quick solution to fix that mess :
	#
	# 1] export all your delicious tags to a html file e.g. delicious.html
	# 2] execute the below awk script to the exported file


	BEGIN{ FS = "=" }
	{
	# network route that goes nowhere - blackhole filtering

	# 1] available to almost every host implementing the ip module
	# 2] almost 0 performance impact
	# 3] can sustain higher throughput than conventional firewalls

	route add -host 192.168.1.1 reject
	#!/bin/bash
	# http://hacktux.com/bash/control/c

	cleanup()
	# example cleanup function
	{
	rm -f /tmp/tempfile
	return $?
	}
	#!/bin/bash

	# it can add/delete multiple times the same crontab entry
	# without having to worry for duplicate entries (in case of adding)
	# or any leftovers (in case of deleting)


	# THIS KEY HAS TO BE UNIQUE IN THE ENTRY TO BE ADDED/DELETED
	CMD_KEY="moo"
	#!/usr/bin/env python

	import sys
	import os
	import traceback
	from optparse import Option, OptionParser, OptionGroup

	version_string = "\n\
	%prog\n"