Operating system is computer/device software used to organize how the computer work, mainly as base software that build up and connect all the computer hardware with ability to maintenance and organize how other application work.
Proxy Setting for Apt is needed for us who work behind proxy. It is needed for ubuntu update, package installation, and ubuntu upgrade. This proxy setting used by apt can be configured with apt.conf and if it’s not configured ubuntu will use or read proxy configuration environtmen. read this post setting proxy bactrack or ubuntu to set proxy environtmen.
On ubuntu 10.04 we can find apt.conf in /etc/apt, but on ubuntu 11.04 i can’t find this file. Reading from some articles i found out that ubuntu 11.04 will still read apt.conf configuration if this file is exist. so i just create file apt.conf in /etc/apt/
Snort is free intrusion detection system (ids) for unix, linux, and windows. Snort is very light, means it will not asked your cpu to work to hard. Snort is actually simple to install and to use in it basic installation, it is advanced configuration of course, need more research and practice. Here i will give example of Snort installation on Ubuntu. This guide is for snort 2.9. on Ubuntu 10.04.
Original installation documentation can be found on snort web page.
3. Install Jpgraph and Snortreport
Jpgraph is required to display graph later on our web monitoring
sudo wget http://hem.bredband.net/jpgraph/jpgraph-1.27.1.tar.gz
sudo mkdir /var/www/jpgraph
sudo tar zxvf jpgraph-1.27.1.tar.gz
sudo cp -r jpgraph-1.27.1/src /var/www/jpgraph/ Continue reading Snort Installation on Ubuntu→
Cron is one of the most useful utilities in FreeBSD. Cron is application that running in background that checks file /etc/crontab constantly, it is usually used for automatic commands execution. Using cron and this crontab file you can also start any service you want automatically or scheduled.
1. to change crontab or edit crontab file (using ee or vi)
Sometimes we need to generate random password to provide rather secure login mecanism for our system. For example if we want to change password randomly for our ftp user. This can be done by using pwgen command. In pwgen man page, i found explanation to use this command. here i will give u the example:
1. basic usage :
example basic pwgen command and its result:
windows 8 taste, well this post is actually my friend’s opinion and experience about the newest edition of windows available, windows 8 developer preview. microsoft gives us a chance to experience these features :
1. windows 8 start screen
This is the default start screen replacing the classic desktop. you can still click the classic desktop to switch to the classic layout
it’s not uninstall actually, hha just simply delete it.
after a month i tried to use backtrack 5, i found out that my disk space allocated for backtrack 5 was nearly empty, 10 GB was too small. So i’d like to add new disk space, but i haven’t found the way to do it. I came up with uncool steps.
1. Remove old backtrack installation
2. Reinstall backtrack with new disk space allocation
to remove backtrack installation, which is dual booted with windows 7, i have to make sure my windows 7 can still work well. after googling, i got the message to do fixmbr to recover windows 7 boot manager. so here are the steps.
A. Fixing windows 7 boot manager
1. prepare your win7 installation disk (dvd/usb), plug it in.
2. start your computer, set the boot priority from bios setting (first boot usb, or cd/dvd room)
3. when windows 7 installation comes up, choose repair
4. choose repair this computer with recovery tool, click next
5. choose command prompt
6. enter this command
7. reboot your computer
B. Remove backtrack
1. now your computer should start the win 7 automatically
2. go to control panel > System and Security > Administrative Tools > Computer Management > choose Disk Management (under storage properties)
3. u will see clearly your computer partitions, delete your backtrack partition by right click > delete Volume
4. after it is deleted you will have new disk space and u can expand your other windows partition.
when i added new user in my ubuntu hosting and try to access the site, i got the message. i spent some time searching for the problem and solution. my first guess, there is problem with file permission in the home directory. read about unix/linux file permission on my site here.