How to upgrade a single package if needed using apt.

This command will update a single package upon request. This would be very useful if you want to update only a certain package. dpkg -s <package> 2>/dev/null | grep -q Status.*installed && sudo apt-get install <package> I found this tip here:

Ubuntu 9.10 Human theme for GTK 3.0

This is a good theme for your modern Ubuntu or Linux Mint desktop, a version of the Human theme for GTK 3.0: This is a perfect theme to make your Ubuntu desktop look like the old Ubuntu 8.10 releases. Here is another lovely GTK 3.0 theme, Dorian: A collection of old Ubuntu wallpapers: […]

How to change your hostname on Linux the easy way.

Use the sudo hostnamectl set-hostname HOSTNAME to set a new hostname for your machine. This command does all of the steps in one go and takes the worry out of this task. Just close the terminal after entering this command and reopen it and the new hostname will be visible. Here I am setting a […]

How to shutdown your Linux system properly with the command prompt.

The shutdown command for Linux and UNIX is used to shutdown your Linux system properly. This command will bring down the system immediately. shutdown -h now This will shut down the system in 60 minutes. shutdown -h +60 Use this command to reboot the computer immediately. shutdown -r now Here is an alternative command for […]

Cool fork bomb for Windows that will bring a machine to it`s knees.

This cool fork bomb will open a CMD window and then another and another exponentially until the machine slows to a halt. This is for interests sake only. 1 2 3 :s start "loop.bat" %0 goto s This is another variant. 1 2 3 4 @echo off :begin echo Hello Mr Anderson. goto begin And […]

Ubuntu Ambience theme on ABC news. Another sighting of this free OS.

This is a sighting of Ubuntu on American ABC news in a sensationalist segment about “terrorist hackers on steroids.” They are showing the Ubuntu Ambience theme to show that all terrorist hackers use Linux. This is sensationalist journalism, like all mainstream news, but is an interesting screenshot though.

Some useful tips for Linux Mint users.

To open a new virtual terminal to enter commands, use the Ctrl-Alt-F2 key combination and enter your username and password. This is a virtual terminal where you can control your system with a distraction free full-screen terminal. There are key combinations to switch between virtual terminals, read more here: To get a version of […]

How to send a message to logged on users on your Linux system with a simple command.

The wall command is a perfect way to send a message to all logged on users on a Linux machine. This is used when you shutdown to alert all users that the system will be shutting down. The example below shows me sending the output of the ps command to all users. ubuntu@ip-172-31-20-234:~$ sudo ps […]

Sony pictures servers compromised and files stolen.

Sony pictures serves were recently hacked and some files were stolen. Apparently, there was a single folder named “Passwords” and this contained all of the files that were stolen. Apparently a DVDrip of the movie Fury was downloaded as well as countless passwords and other files. 47,000 social security numbers for various Hollywood stars including […]

Create a cool looking clock in your terminal.

This simple little script will print an updating clock in the terminal. #!/bin/sh watch -t -n 1 ‘date +%H:%M:%S | figlet’ This version will print a cow that tells you the time. #!/bin/sh watch -t -n 1 ‘date +%H:%M:%S | cowsay’ And finally, this prints the time using blocky characters. #!/bin/sh watch -t -n 1 […]

More useful bash tricks for navigating your filesystem.

To navigate back to the last directory you were in, type cd -. This will take you back to where you were before. The cd ~ command will take you back to your home directory. The user can also use the cd command by itself to go back to the home directory. Using cd .. […]

How to use a Python script to extract information from the Firefox web browser.

The dumpzilla Python script allows a user to extract information from the Firefox web browser. This is useful when you are on someone elses machine and you wish to extract information about their browsing habits. Download the script from here: Make it executable: chmod +x Then you may begin to analyse a Firefox […]

Useful web page for generating sources.lst files for Ubuntu with a simple interface.

This web page allows a user to generate a sources.lst file for an Ubuntu distribution. is a site that allows you to recreate your sources.lst if it is deleted accidentally. This would be very useful for a person that needs this kind of service in a hurry. So, check this site out and see […]

How to use steghide to embed a text file inside an image.

The steghide program is used to embed one image inside another. I will be showing you how to embed a text file inside an image and then set a passphrase to use when recovering the text file. This is a simple example, I am embedding the file my.txt into a screenshot from a movie. root@user:~# […]

How to mount the Ubuntu filesystem read-write when you have mounted the filesystem in recovery mode.

If you have appended this to the end of the grub command line to change a lost password: init=/bin/bash Ubuntu and you get this error. root@USB-h55-PC:~# passwd jason Enter new UNIX password: Retype new UNIX password: passwd: Authentication token manipulation error passwd: password unchanged Then you may fix this by remounting the filesystem read-write. Accomplish […]