Free and Open Source blogger with an attitude
Guake is a fancy Quake-like terminal which lets you access it by using a hotkey (user-customizable). Unobtrusive, Guake slides down from the top of the screen, and can be used while running other desktop applications, providing you with a quick access to the console.
Guake is available from Debian, Ubuntu and Fedora repository or can be downloaded from Guake’s Official Website
You can easily generate QR Code under Ubuntu using the command line ‘qrencode’ package. In Ubuntu 11.04 Natty Narwhal, you can install qrencode using this command:
apt-get install qrencode
To generate QR Code image, you only need to run this command:
qrencode -l L -v 1 -o qrcode-test.png "Hello, World!"
QR Code is a form of 2 dimensional barcode which can store arbitary text data including URL, email or plain text. For more information, please refer to the QR Code Wikipedia Entry
Here’s an easy way to encrypt your file using OpenSSL. The general syntax is:
openssl enc (cipher) -e -in (input file) -out (output file)
so to encrypt a “plaintext.txt” file, using aes256, you only need to run this command:
openssl enc aes256 -e -in plaintext.txt -out encrypted.txt
Similarly, to decrypt the file, you can run the command:
openssl enc aes256 -d -in encrypted.txt -out decrypted.txt
One of the factor that makes your system easily crackable is the weak password. PAM cracklib forces users to choose stronger password by analyzing the password strength, length and entropy.
To enable pam_cracklib in Debian / Ubuntu operating system, you need to install libpam_cracklib:
sudo apt-get install libpam_cracklib
Then edit the “/etc/pam.d/common-password” file using your favorite editor. Then, add and uncomment the following line at the end of the file.
password required pam_cracklib.so retry=3 minlen=6 difok=3
difok determines the number of same characters that allowed to be present in the old and new passwords.
Ubuntu 10.10 Maverick Meerkat release is just around the corner!
Here’s how to upgrade Ubuntu 10.10 Maverick Meerkat using bash shell
sudo sed -i 's/lucid/maverick/g' /etc/apt/sources.list && sudo aptitude update && sudo aptitude dist-upgrade
sudo aptitude install update-manager-core
sudo do-release-upgrade -d
That’s it! Happy upgrading!
Let’s say you’ve manage to get yourself into a GNU/Linux bash terminal. What can you do in order to determine its distro and release information? Listed here are the three methods to get release information of a running GNU/Linux box.
lsb_release method
You can type “lsb_release -a”
/etc/*release and /etc/*issue method
Alternatively, you could try typing “cat /etc/*release” or “cat /etc/*issue”.
/proc/version method
If else fails, you could always try the “cat /proc/version” method to see where the kernel came from.
Hope this would help!