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some commands Hot-screensaver Variables 3.2.1. Types of variables As seen in the examples above, shell variables are in uppercase characters by convention. Bash keeps a list of two types of variables: 3.2.1.1. Global variables or environment variables are available in all shells. Below is a typical output: 3.2.1.2. Local variables are only available in the current shell. Below is a diff file made by comparing printenv and set output, after leaving out the functions which are also displayed by the set command: 3.2.1.3. Apart from dividing variables in local and global variables, we can also divide them in categories according to the sort of content the variable contains. String variablesInteger variablesConstant variablesArray variables We'll discuss these types in Chapter 10. 3.2.2. Variables are case sensitive and capitalized by default. To set a variable in the shell, use VARNAME="value" Putting spaces around the equal sign will cause errors. Some examples using upper and lower cases, numbers and spaces: 3.2.3. 3.2.4. 3.2.4.1.

www.bsd.org Explorer Destroyer - Switch to Firefox, Make money from Adsense Referral 12.04 LTS (Precise Pangolin) Ubuntu is distributed on five types of images described below. Desktop CD The desktop cd allows you to try Ubuntu without changing your computer at all, and at your option to install it permanently later. There are two images available, each for a different type of computer: PC (Intel x86) desktop CD For almost all PCs. 64-bit PC (AMD64) desktop CD Choose this to take full advantage of computers based on the AMD64 or EM64T architecture (e.g., Athlon64, Opteron, EM64T Xeon, Core 2). Server install CD The server install cd allows you to install Ubuntu permanently on a computer for use as a server. PC (Intel x86) server install CD 64-bit PC (AMD64) server install CD Alternate install CD The alternate install cd allows you to perform certain specialist installations of Ubuntu. In the event that you encounter a bug using the alternate installer, please file a bug on the debian-installer package. PC (Intel x86) alternate install CD 64-bit PC (AMD64) alternate install CD Wubi filesystem archive

Aprenda a instalar um servidor de FTP em 5 minutos… ..no Ubuntu/Mint/Caixa Mágica Sou questionado algumas vezes se a instalação/configuração de um servidor FTP em Linux é fácil. Costumo responder que fácil não é…é super fácil. O vsftpd é um servidor de FTP fantástico, que oferece funcionalidades bastante interessantes, das quais se destacam: Suporte para Virtual IPSuporte para utilizadores virtuaisSuporte para IPv6Encriptação de dados através da integração do protocolo SSLControlo da largura de bandaConfiguração por utilizadore Para instalar um servidor de FTP no Ubuntu ou Mint, o utilizador apenas necessita de realizar os seguintes passos. Passo 1 – Instalar o vsftpd Passo 2 – Configurações do serviço vsftpd Por norma os ficheiros de configuração dos serviços encontram-se em /etc. Ficheiro vsftpd.confDesactivar o acesso “anónimo”. Permitir o acesso a utilizadores locais Vamos então abrir o ficheiro /etc/shells e adicionar a linha /bin/false Passo 4 - Criar um utilizador (conta) FTP Criar pasta do utilizador (ex. Como aceder ao servidor FTP

Kill Bill's Browser - Switch to Firefox Chapter 4. Guest Additions Chapter 4. Guest Additions The previous chapter covered getting started with VirtualBox and installing operating systems in a virtual machine. For any serious and interactive use, the VirtualBox Guest Additions will make your life much easier by providing closer integration between host and guest and improving the interactive performance of guest systems. As mentioned in Section 1.2, “Some terminology”, the Guest Additions are designed to be installed inside a virtual machine after the guest operating system has been installed. The VirtualBox Guest Additions for all supported guest operating systems are provided as a single CD-ROM image file which is called VBoxGuestAdditions.iso. The Guest Additions offer the following features: Mouse pointer integration To overcome the limitations for mouse support that were described in Section 1.8.2, “Capturing and releasing keyboard and mouse”, this provides you with seamless mouse support. Shared folders Better video support Seamless windows 4.2. Note

Linux Knowledge Base and Tutorial Table of Contents Introduction to Operating Systems This section provides an introduction to basic operating system principles from a Linux perspective. We talk about processes, files and directories and the basics of how a user interacts with the system. Linux Basics This section provides an overview of Linux as an operating system and as a product. Working With the System In this section we talk about user interaction with the system, primarily from the command line. Shells and Utilities Here we talk in detail about the traditional way users interact with the system: the shell. Editing Files This section covers four of the most common methods of editing or manipulating files: the vi editor, awk, sed and perl. Basic Administration In this section we talk about the basics of system administration. The Operating System This section is a more detailed description of the Linux operating system. The X Windowing System Here we go into the basics of the X Windowing System. The Computer Itself Networking

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