LinuxCommand.org: Learn the Linux command line. Write shell scripts. Web Upd8: Ubuntu / Linux blog. OMG! Ubuntu! | Everything Ubuntu. Daily. Malicious Linux Commands - From (This article was originally published in Ubuntu Forums but was removed there. Ubuntuguide feels that knowledge about these risks is more important than any misguided attempts to "protect the public" by hiding their potential dangers or protect the (K)Ubuntu/Linux image. The original article has therefore been re-created (and subsequently edited) here.)
ATTENTION: It is worthwhile to have some basic awareness about malicious commands in Linux. Always be cautious when running one of these (or similar) commands (or downloaded scripts) that have been "recommended" as a solution to a problem you may have with your computer. It is also worthwhile to always enable a Kubuntu screensaver or Ubuntu screensaver with a password so that a casual passerby is not able to maliciously execute one of these commands from your keyboard while you are away from your computer. Here are some common examples of dangerous commands that should raise a red flag. Rm -rf / rm -rf . rm -rf * rm -r Forkbomb In Perl or. Learn Linux, 101: The Linux command line.
Overview This article gives you a brief introduction to some of the major features of the bash shell, and covers the following topics: Interacting with shells and commands using the command lineUsing valid commands and command sequencesDefining, modifying, referencing, and exporting environment variablesAccessing command history and editing facilitiesInvoking commands in the path and outside the pathUsing man (manual) pages to find out about commands This article helps you prepare for Objective 103.1 in Topic 103 of the Junior Level Administration (LPIC-1) exam 101. The objective has a weight of 4. The material in this article corresponds to the April 2009 objectives for exam 101. You should always refer to the objectives for the definitive requirements.
Back to top The bash shell The bash shell is one of several shells available for Linux. Before we delve deeper into bash, recall that a shell is a program that accepts and executes commands. Shells also use three standard I/O streams: Echo Env. More Linux Commands - A practical reference. All commands. Linux Newbie Guide by Stan, Peter and Marie Klimas. Intro. We are relative Linux newbies (with Linux since Summer 1998). We run mostly RedHat and Mandrake -> the solutions might not be directly applicable to other Linux distributions (although most of them probably will be).
Hope this helps; we try to be as practical as possible. Of course, we provide no warranty whatsoever. If you spotted a bad error or would like to contribute a part on a topic of your choice, we would like to hear from you. General description of this Guide. Conventions: <> = single special or function key on the keyboard. Part 0: For the Undecided (Linux Benefits) If you are wondering what the Linux pros and cons are, and whether Linux is for you. Part 1: Before Linux Installation What distribution should I use, how to obtain it, Linux hardware requirements, how to partition your hard drive, about dual boot, which packages to install, which graphical user interface (GUI) to install (gnome or kde?) Licence, Acknowledgments and log of changes. 100 Vim commands every programmer should know.