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:s start "loop.bat" %0 goto s This is another variant. 1 2 3 4 @echo off :begin echo Hello … Read more
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.
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: http://www.tldp.org/LDP/GNU-Linux-Tools-Summary/html/virtual-terminals.html. To get a version of … Read more
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 … Read more
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 … Read more
This simple little script will print an updating clock in the terminal. #!/bin/sh watch -t -n 1 ‘date +%H:%M:%S | figlet’#!/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’#!/bin/sh watch -t -n 1 … Read more
Navigating the Linux filesystem is very easy. The cd command is used to move to another directory. But there are other ways too. To navigate back to the last directory you were in, type cd -. This will take you back to where you were before. ubuntu /usr/share $ cd – /home/ubuntuubuntu /usr/share $ cd … Read more
This web page allows a user to generate a sources.lst file for an Ubuntu distribution. repogen.simplylinux.ch 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 … Read more
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:~# … Read more
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 unchangedroot@USB-h55-PC:~# passwd jason Enter new UNIX password: Retype new UNIX password: passwd: … Read more
Window manager themes. RISC styled WM theme for Xfce4: http://www.marutan.net/themes.php. GTK themes. Mac OS Classic theme for Xfce4: http://xfce-look.org/content/show.php?content=144719. Mac OS classic GTK2 theme: http://gnome-look.org/content/show.php/Mac+OS+9+Platinum+gtk+theme?content=110444. Plane GTK: http://gnome-look.org/content/show.php/Plane-Gtk3.6?content=156309. Classic 95 Windows `95 theme for MATE and Gnome: http://gnome-look.org/content/show.php/Classic95?content=157298. How to create a look-alike Windows XP desktop using IceWM: http://kmandla.wordpress.com/projects/lookalike-windows-xp-classic/. Windows 3.1 theme for Xfce4: http://xfce-look.org/content/show.php/Redmond3+%28Windows+3.1+theme%29?content=121526. … Read more
Sandisk have released a 400GiB SSD drive that enables a server machine to expand storage by plugging the device into a standard RAM slot. This is an interesting device, the ability to sacrifice a RAM slot and install a Solid State Drive instead. This device, placing storage closer on the motherboard to the CPU is … Read more
To reboot your Linux machine, use the sudo reboot command. Another way is to type sudo shutdown -r now. This command will also shut down your machine. ┌─[jason@darkstar]─[~] └──╼ $sudo init 0┌─[jason@darkstar]─[~] └──╼ $sudo init 0 Use this command to reboot your computer. ┌─[jason@darkstar]─[~] └──╼ $sudo init 6┌─[jason@darkstar]─[~] └──╼ $sudo init 6 To lookup the … Read more
The new Interstellar movie is one that showcases science in a positive light as the possible saviour of mankind. We do need to find other planets to settle on, but why not settle on Mars? It has sunlight that we could use for generating power and water. But travelling through a wormhole is one way … Read more
This command will display a count of successful logins to your Linux machine. jason-H55-USB3% grep ‘session opened’ /var/log/auth.log | wc -l 67jason-H55-USB3% grep ‘session opened’ /var/log/auth.log | wc -l 67 This will display a count of failed login attempts to your Linux machine. jason-H55-USB3% grep ‘FAILED LOGIN’ /var/log/auth.log | wc -l 3jason-H55-USB3% grep ‘FAILED LOGIN’ … Read more
The Linux command line is very useful for finding files, the find command is the best way to locate files on your filesystem. This is a simple example. knoppix@Microknoppix:~$ sudo find /proc -name "meminfo" /proc/meminfoknoppix@Microknoppix:~$ sudo find /proc -name "meminfo" /proc/meminfo Use the -maxdepth parameter to only search a certain number of levels deep into … Read more
If you click a link in Google and the forum post you wanted to read requires a login to view, click back and then click the green drop down arrow at the end of the link, then click the cached option. This will open a cached version of the forum posting. This way, you can … Read more
This Powershell command will install a Windows feature on your Windows 8.1 or server 2012 machine. I am only using the telnet server as an example. PS C:\Users\Administrator> Install-WindowsFeature telnet-server Success Restart Needed Exit Code Feature Result ——- ————– ——— ————– True No Success {Telnet Server} This is how easy it is to install a … Read more
Get your uptime with the uptime command on Linux. Last login: Tue Oct 28 13:55:23 on ttys000 iMac05:~ admin$ uptime 11:24 up 111 days, 20:38, 2 users, load averages: 0.35 0.16 0.14Last login: Tue Oct 28 13:55:23 on ttys000 iMac05:~ admin$ uptime 11:24 up 111 days, 20:38, 2 users, load averages: 0.35 0.16 0.14 The … Read more
The lsdvb command will list all installed DVB hardware in your Linux system. Here it is showing my Realtek DVB stick. You need to use sudo to enable this command to gather more information. jason-H55-USB3 [lsdvb] ~/Documents jason-H55-USB3% sudo lsdvb lsdvb: Simple utility to list PCI/PCIe DVB devices Version: 0.0.4 Copyright (C) Manu Abraham … Read more