Update manager indicator notify you with available updates for the system. it shows up on the top panel of gnome shell interface with how many updates available, update name, brief information about the update and the size for each update. Continue reading
du is a disk usage command allows you to easily know file and directory sizes, also you can view file and directory sizes decreasing starting by biggest file, otherwise increasing by smallest file. Continue reading
pushd and popd commands become handy sometimes and make access to directories really quickly many times You can use pushd and popd commands in case you want to save a directory and want to get back to it later using popd. down there you will find a quick tutorial showing instructions for using pushd and popd commands, also i will type same instructions in this post. Continue reading
Terminal based application , which are minimalist apps running through your terminal … some people don’t like the fancy rich GUI and prefer simple text-based UI to use …they are old school geeks . Most of the apps in this post are very old and you may recognize them as revolutionary projects such as Vi . This list if for people who are new into Linux world and they wanna try something new ” old school stuff ” … Continue reading
If you been testing early releases of Ubuntu 10.10 Maverick desktop you will notice that many enhancements and applications added are quite good, and really helpful. Continue reading
Running multiple commands really helpful in many ways for installing packages, copying files, moving files, …. .Sometimes when you try to install a package output message show that you have install extra dependencies, this will be really annoying to install them one by one. with these commands will make it easily for you to write it once for all. Continue reading
APT stand for Advanced Packaging Tool, first designed as a front-end for dpkg to work with .deb packages for Debian operating system, also this package working on multi platform so you might see APT working on many different distributions even it’s not debian based. Continue reading
What’s Thumbs.db Files ?
Thumbs.db files is related to Microsoft Windows operating system, simply this file able to store thumbnails for many files such as pictures and movies to easily identify the movie without reading file name, this file become available with all Microsoft operating system starting with Windows XP. Thumbs.db automatically cash all supported formats thumbnails on this file. it help a lot improve the loading time of any directory contain images or videos, and safe CPU processing time. Continue reading
A quick How To For today create ISO file from CD or DVD using command line.
Usually I use this command to get an ISO image from Disk for operating system, for example I have Kubuntu 10.04 LTS on a Disk, and i want to use that image on my virtual machine, instead of keeping the CD inside my CD ROM all the time.
Also you can use it as a backup way to keep your files safe on ISO file. I am sure you will figure out many ways to use this command for :)
Insert the disk
then open terminal,,, type
I am not sure what dd stand for ” destroy data “, ” delete ” according to wiki :)
if : input file
of : output file for the image will be copied to
dvd : it’s a variable according to what’s the device name located on ” dev ” directory
to get more information about dd unix command follow this link
That’s it for now, If you have any questions please inform me.
A quick How To: change the password for users accounts on Ubuntu 10.04 LTS using Terminal
change the password for the operating system from time to time, that’s keep your stuff safe.
- Instructions to make a strong password
it really important to know how to choose your password make sure you have included different letters, not a familiar word, not a birthday, not a mobile phone number, try to use capital letters, signs such as ” *-+_..” stuff like this.
Go to terminal
passwd "username" without quotes ""
will ask you for current password
then it will ask you for new password you want, make sure you remember to this instructions to make a strong password.
that’s it for now.
10 free GNU/Linux Administration Books
Linux based distributions have a lot of different administration options and privilege options, Books listed here will help you with administrations privilege for different distributions debian, fedora, redhat, ubuntu, gentoo, opensuse, mandriva, …..
Also other books for security administrations, and files system directory hierarchy, software help you to secure you system, securing VPN servers,…
## so here we go…
This documentation will attempt to summarize the installation and configuration, as well as the day-to-day administrative and maintenance procedures that should be followed to keep a Linux-based server or desktop system up and running. It is geared to an audience of both corporate as well as home users. It is not intended to be a full overview of Unix operations, as there are several good texts available as well as on-line documentation which can be referred to in cases where more detailed information is required.
The Linux System Administrator’s Guide, describes the system administration aspects of using Linux. It is intended for people who know next to nothing about system administration (those saying “what is it?”), but who have already mastered at least the basics of normal usage. This manual doesn’t tell you how to install Linux; that is described in the Installation and Getting Started document. See below for more information about Linux manuals.
The filesystem standard has been designed to be used by Unix distribution developers, package developers, and system implementors. However, it is primarily intended to be a reference and is not a tutorial on how to manage a Unix filesystem or directory hierarchy.
There are numerous definitions for “computer security”, and most of them are correct. Essentially computer security means enforcement of usage policies, this must be done since people and software have flaws that can result in accidents, but also because someone may want to steal your information, use your resources inappropriately or simply deny you the use of your resources.
This manual assumes the reader is familiar with using a Unix system and/or understands Debian User Reference Manual. Additional reading for System Administrator is Debian GNU/Linux Network Administrator’s Manual. Both of these are available from the Debian Documentation Project. Another useful book is “Linux System Administrator’s Guide” by Lars Wirzenius, available from Linux Documentation Project, http://metalab.unc.edu/LDP/ .
The target audience of the book is anyone who wants to deepen their understanding of how computer systems work, as well as anyone who is likely to become involved with the technical aspects of computer intrusion or system analysis. These are not only system administrators, incident responders, other computer security professionals, or forensic analysts, but also anyone who is concerned about the impact of computer forensics on privacy.
Call it the Linux fallacy. It’s the conventional wisdom that says Linux/UNIX gives you lots of power and reliability in exchange for far more complex and costly systems management. But in fact Linux/UNIX shouldn’t be a tradeoff–as long as you also implement a set of proven best practices.
The GNU/Linux systems have reached an important level of maturity, allowing to integrate them in almost any kind of work environment, from a desktop PC to the sever facilities of a big company.
In the course Systems Administration. It is an attempt to give you an overview of the course and more importantly of computing, Linux and Systems Administration.
Many students commented that they felt lost in the detail of Linux without having an overall picture of how it fits together. Hopefully this chapter will go some way towards solving this problem, and will provide some sort of small map and compass so you have an idea of where you are and where you are going.
The aim of this book is to get you up to speed with GNU/Linux and to deliver a fun and productive environment. It guides you through the many different regions of a GNU/Linux system with a focus on getting your desktop environment to do what you want it to do. It is comprehensive with basic support for the user who installs and maintains the system themselves (whether in the home, office, club, or school). It provides insights and step-by-step procedures that deal with specific tasks in setting your system up and maintaining it. The book covers many of the core features of a GNU/Linux system and you will gain the knowledge to enjoy and use one of the most comprehensive and useful developments in the history of computing.