Simple one liner to check if your web server is using strong ciphers
[code]
openssl s_client -cipher LOW -host SERVER_NAME -port 443 [/code]
admin
HOW TO : Use Python to look for credit card numbers
Simple script in python to look for credit card numbers in a file.
[code]
#Importing modules
import re
import os
# Define variables
inputFile = ‘test.txt’
searchPattern = ‘((\D(6011|5[1-5]\d{2}|4\d{3}|3\d{3})\d{11,12}\D)|(^(6011|5[1-5]\d{2}|4\d{3}|3\d{3})\d{11,12}\D))’
tempinputFile = open(inputFile)
tempLine = tempinputFile.readline()
while tempLine:
print ("LINE: " + tempLine)
foundContent = re.search(searchPattern,tempLine, re.IGNORECASE)
if foundContent:
print("FOUND: " + foundContent.group())
tempLine = tempinputFile.readline()
tempinputFile.close() [/code]
The script started out as a simple check for any 16 digit numbers that had a non numeric character on either end. But I tweaked it a little bit to look for credit card like numbers using the regex from http://www.regular-expressions.info/creditcard.html. Finally I added an option to match credit card like numbers if the numbers start at the beginning of the line (i.e there is no non-numeric number before the credit card number)
OVERHEARD : Comment about fudging
Actually, this is more of a read on the web post. New acronym for describing technology that doesn’t really help
CBT : Cock-n-Bull Technology
🙂
HOW TO : Find files, search for content in them, replace the content
The title pretty much says it all :). Here is a quick one liner, using multiple tools, to look for files in a directory, search for certain content in them and replace them with other content
[code]find -type f | xargs grep -l ORIGINAL_CONTENT | xargs perl -p -i -e ‘s/ORIGINAL_CONTENT/NEW_CONTENT/g’ [/code]
You can theoretically take out the grep (second command) and directly pipe the find output to perl and get the same outcome.
Going over list of the options used
find
- “-type f” lists all objects of type file in the directory (and sub directories)
grep
- “-l” lists the names of the files (with relative path) which have the text ORIGINAL_CONTENT in them
perl
- “-p” forces perl to loop through requests. In this case files
- “-e” tells perl that the next argument is a perl statement
- “-i” tells perls to edit the file in place (i.e. no need for an output file)
Things I install on a new computer
Making a list just because :).. Here are some of the things I install on a windows machine as soon as I get it
- Network
- Utilities
- SysAdmin
- Cloud
Whats on your workstation?
HOW TO : Use word boundaries in Regular Expressions
If you are every looking to match strings as a whole word instead of literal strings using a regular express, Word Boundaries are your friend
For example if you are looking to match a string of 10 numbers in a log file, you can use
[code]grep -i ‘\b[0-9]\{10,\}\b’ –color -H -n FILE_NAME_TO_SEARCH [/code]
The \b is the option that tells grep to look for a word character.
More information about the option is available at http://www.regular-expressions.info/wordboundaries.html
Overheard : Comment about content
Doc Searls on the conflict between content creators and consumers in the digital era
Data wants to be free but value wants to be paid for
Overheard : Comment about Internet
Tom Merritt on the Internet
The internet never forgets anything until you want to keep it, (and) then it forgets it
Overheard : Comment about politics
Milwaukee mayor, Tom Barrett commenting about his political goal while speaking with Robert Siegel on all things considered
I will never be the rock star of the far right and I’ll never be the rock star of the far left. What I want to be is rock solid and create jobs in the state.
Entire interview can be found here http://www.npr.org/2012/05/31/154093267/political-battle-heats-up-as-wis-recall-election-nears