Complete, Concrete, Concise » Entries tagged with "ubuntu 12.04"
Ubuntu 12.04 – How to Change the Timeout Period for sudo
This tutorial is for Ubuntu 12.04. It should be the same for other versions of Ubuntu and (probably) most other Linux distributions, but no guarantee is made. Detailed instructions for opening a command line / terminal can be found here. By default, sudo temporarily grants administrative privileges for 15 minutes. This means the first time you run sudo you will be prompted for your password. For the next 15 minutes, you can run sudo <command> without having to enter a password. This should be fine for most users because the average user is likely to drop down to a command line to run an administrative command or two rarely. 1) Open a terminal using Ctrl + Alt + T 2) Enter the following command: sudo visudo 3) Enter your password: Note: when you type your password, nothing will happen … Read entire article »
Filed under: Ubuntu 12.04
Ubuntu 12.04 – Command Line Basics: Editing Files
This tutorial is for Ubuntu 12.04. It should be the same for other versions of Ubuntu and (probably) most other Linux distributions, but no guarantee is made. Detailed instructions for opening a command line / terminal can be found here. When you work at the command line, from time to time, it may be necessary to edit files. Normally, you can use an editor like gedit (the GUI based editor that comes with Ubuntu), however, by default, it will not permit you to edit system configuration files (which are likely the files you are trying to edit if you happen to be at the command line). Starting gedit with Administrator Privileges Enter the following command to start gedit with administrator privileges: sudo gedit Note: when you type your password, nothing will happen on the screen. This is normal. … Read entire article »
Filed under: Ubuntu 12.04
Ubuntu 12.04 – Basic Command Line Techniques
This tutorial is for Ubuntu 12.04. It should be the same for every other version of Ubuntu and all other Linux distros, but I make no guarantee. Linux (on which Ubuntu is based) is fundamentally a command line driven operating system. While there are graphical interfaces to many of the available commands, sometimes you need (or have no choice) to work at the command line. There are five fundamental things everyone working at the command line should know (or at least be aware of): man pipes redirection more ls man man is short for manual man is the help file. When you want to know more about a command, you enter man <command name> to display information about the command. For example: man ls will bring up the man page for the command ls. You could also enter man man to display information about … Read entire article »
Filed under: Ubuntu 12.04
Ubuntu 12.04 – How to Completely Remove / Uninstall Xubuntu Core Desktop
These instructions are for Ubuntu 12.04 running the Unity desktop on which the Lubuntu Core Desktop was installed using either the Ubuntu Software Center or sudo apt-get on the command line. The instructions may be the same for other versions of Ubuntu, but no guarantee is made. When the Xubuntu Core Desktop is installed in Ubuntu 12.04, it installs several packages and libraries it requires as well as some optional packages. Not all these packages and libraries are uninstalled when you uninstall Xubuntu Core Desktop. Several packages (like thunar) do not get uninstalled. Quick Uninstall This is not recommended because it will remove all packages normally installed with Xubuntu Core Desktop. This may include packages you previously installed (such as thunar) or that were installed as dependencies for other packages. Note: this uninstall command assumes … Read entire article »
Filed under: Ubuntu 12.04
Ubuntu 12.04 – How to Completely Remove / Uninstall Lubuntu Core Desktop
These instructions are for Ubuntu 12.04 running the Unity desktop on which the Lubuntu Core Desktop was installed using either the Ubuntu Software Center or sudo apt-get on the command line. The instructions may be the same for other versions of Ubuntu, but no guarantee is made. When the Lubuntu Core Desktop is installed in Ubuntu 12.04, it installs several packages and libraries it requires as well as some optional packages. Not all these packages and libraries are uninstalled when you uninstall Lubuntu Core Desktop. Several packages (like galculator) do not get uninstalled. Quick Uninstall This is not recommended because it will remove all packages normally installed with Lubuntu Core Desktop. This may include packages you previously installed (such as galculator) or that were installed as dependencies for other packages. Note: this uninstall command assumes … Read entire article »
Filed under: Ubuntu 12.04
Ubuntu 12.04 – Installing the Xubuntu Core Desktop
These instructions are for installing the Xubuntu Core Desktop in Ubuntu 12.04 running the Unity Desktop. Installation instructions may be the same or similar for other versions of Ubuntu or for other Linux distros, but no guarantee is made. Installing Xubuntu Core Desktop installs only the GUI part of Xubuntu Desktop without all the extra applications that are part of the Xubuntu Desktop package (the only extra application it installs is the Thunar file manager) The Xubuntu Desktop is a custom configured version of the Xfce Desktop. Xfce is smaller than Xubuntu Core Desktop. Installation instructions can be found here. An article listing alternative desktops for Ubuntu 12.04 can be found here. If you are changing desktops because you are totally lost / confused by Unity, I suggest reading this tutorial and giving Unity a chance. Of … Read entire article »
Filed under: Ubuntu 12.04
Ubuntu 12.04 – How to Install the Lubuntu Core Desktop
These instructions are for installing the Lubuntu Core Desktop in Ubuntu 12.04 running the Unity Desktop. Installation instructions may be the same or similar for other versions of Ubuntu or for other Linux distros, but no guarantee is made. Installing Lubuntu Core Desktop installs the GUI part of Lubuntu Desktop without all the extra applications that are part of the Lubuntu Desktop package. This is a good option for those who are happy with the applications provided with Ubuntu, but simply want to change their desktop. The Lubuntu Core Desktop is a custom configured version of the LXDE Desktop. To install a very basic LXDE desktop without additional applications, I recommend installing the LXDE Core desktop. Installation instructions can be found here. There is also a version of the LXDE Desktop that includes a little more … Read entire article »
Filed under: Ubuntu 12.04
VirtualBox – How to Access USB Devices
These instructions are for VirtualBox 4.1.18 running on Windows 7 with Service Pack 1 with Ubuntu 12.04 (running the Unity Interface) as the guest OS. I believe the instructions are the same (or very similar) regardless of which host OS and guest OS combination you are running, but I make no guarantee. Sometimes you want to (or need to) directly access a USB device, like a memory stick, or a printer, or camera. Normally, VirtualBox does not provide access to these devices, however, it is possible to allow the guest OS to directly access the USB device. (I needed to allow Linux to directly access a SD card so I could use the dd command to copy a OS image. This turned out to be very slow. I am not sure if this was … Read entire article »
Filed under: VirtualBox
Ubuntu 12.04 – How to Completely Uninstall / Remove GNOME Shell
These instructions are for Ubuntu 12.04 running the Unity desktop on which GNOME Shell was installed using either the Ubuntu Software Center or sudo apt-get on the command line. The instructions may be the same for other versions of Ubuntu, but no guarantee is made. When GNOME Shell is installed in Ubuntu 12.04, it installs several packages and libraries it requires as well as some optional packages. Not all these packages and libraries are uninstalled when you uninstall GNOME Shell. Quick Uninstall This is not recommended because it will remove all packages normally installed with GNOME Shell. This may include packages you previously installed or packages previously installed by other applications. Note: this uninstall command assumes GNOME Shell was installed on a fresh Ubuntu 12.04. 1) Open a terminal (instructions can be found here). 2) Enter the … Read entire article »
Filed under: Ubuntu 12.04
Ubuntu 12.04 – How to Completely Uninstall / Remove GNOME
These instructions are for Ubuntu 12.04 running the Unity desktop on which GNOME was installed using either the Ubuntu Software Center or sudo apt-get on the command line. The instructions may be the same for other versions of Ubuntu, but no guarantee is made. When GNOME is installed in Ubuntu 12.04, it installs several packages and libraries it requires as well as some optional packages. Not all these packages and libraries are uninstalled when you uninstall GNOME. Several packages (like epiphany-browser and gnuchess) do not get uninstalled. Quick Uninstall This is not recommended because it will remove all packages normally installed with GNOME. This may include packages you previously installed (like epiphany-browser or gnuchess) or packages previously installed by other applications. Note: this uninstall command assumes GNOME was installed on a fresh Ubuntu 12.04. 1) Open … Read entire article »
Filed under: Ubuntu 12.04
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