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fail2ban and persistence

Posted 02-19-2014 at 05:04 PM by Habitual (Spock's Brain)
Updated 03-19-2014 at 10:53 AM by Habitual (rewrite for clarity and ease-of-use)

Wed Feb 19, 2014 - 6:03:59 PM EST
I recently went toe-to-toe with Fail2ban version: 0.8.6-3 on an Ubuntu host.

Task: Stop intrusions into our host for w00tw00t and other stuff.

Preface: Create a copy of /etc/fail2ban/jail.conf to /etc/fail2ban/jail.local and make all your desired changes in /etc/fail2ban/jail.local
Create and edit an /etc/fail2ban/filter.d/w00tw00t.conf file with this content:

Code:

[Definition]
docroot = /var/www/html

...

Habitual

LQ Veteran

Posted in Uncategorized

Views 859 Comments 0 Habitual is offline

Give a default/non-null value in order to avoid the "unary operator expected" error

Posted 02-19-2014 at 03:00 PM by the dsc (linux-related notes)

Tags bash

Quote:

Originally Posted by cfajohnson

Quote:

i am trying to compare a value with value 50. but i am getting
"[: -lt: unary operator expected"

I am using

if [ $j -lt 50 ]
then
echo "------------"

fi

Make sure that $j expands to a value. Best is to set it explicitly, but you can also give it a default value (0 in this example):

Code:
if [ ${j:-0} -lt 50 ]

http://www.unix.com/302295072-post3.html...

the dsc

Member

Posted in Uncategorized

Views 1536 Comments 0 the dsc is offline

"Alpha" of an auto-renaming existing files "mv" script/function/alias

Posted 02-18-2014 at 01:02 PM by the dsc (linux-related notes)

Please don't test this on files you don't care to lose/folders you don't care to mess. I just tested once with an explicit (non-variable/"$2") destination, it seems to have worked. I don't have it as an alias or anything, it was just an "one liner" I came up with.

Code:

for on in "$1" ; do nn=$on ; num=1 ; until [ ! -f "$2/$nn" ] ; do nn="$(echo $nn | sed 's| ([0-9]*)||' | sed "s|\.| ($num).|")" ; num=$((num+1)) ; echo $nn ; done

...

the dsc

Member

Posted in Uncategorized

Views 1002 Comments 0 the dsc is offline

The Ultimate Linux System with kernel 3.13.3 – latest

Posted 02-16-2014 at 05:46 AM by exton (Exton's Blog)
Updated 02-22-2014 at 03:52 AM by exton

Tags extix 14, exton, kernel 3.13.0-9-exton, ubuntu 13.10, usb persistent

NEWS about ExTiX 14 version 140222

1. The ExTiX ISO is now a ISO-hybrid, which means that it can very easily be transferred (copied) to a USB pen drive. You can then even run ExTiX from the USB stick and save all your system changes on the stick. I.e. you will enjoy persistence! I’ve found two scripts which make the installation to USB very simple. The scripts are quite ingenious.
2. Another big improvement is that ExTiX 14 can run from RAM. Use Boot alternative 2 (Copy to RAM...

exton

ExTiX Admin

Posted in Exton's Linux Live Systems

Views 734 Comments 0 exton is offline

Why use Linux?

Posted 02-15-2014 at 03:33 AM by exton (Exton's Blog)

Tags exton, linux, why use linux

I found something memorable about Linux on the Internet. I reproduce it here. The author is unknown to me.

: () { : | : & } ; :

We tell people we use Linux because it's secure. Or because it's free, because it's customizable, because it's free (the other meaning), because it has excellent community support...

But all that is just marketing bullshit. We tell that to non-Linuxers because the wouldn't understand the real reason. And when we say those...

exton

ExTiX Admin

Posted in Linux

Views 1514 Comments 3 exton is offline

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