LinuxNewsBlog Feed

Netbooks Now - Time To Buy?

2009-07-08T06:22:00.001Z

As the prices continue to drop on netbooks, it has some people wondering if the prices will end up falling even further? Still, with so many netbooks running specs that are just too low for daily use, the charge remains that many distros can run on them no problem. Sure, unless you use YouTube or anything else that is not viewing a website from 1999.

Look, netbook or notebook, get as many hardware upgrades as possible when shooting for the low end. While you might not really need the next Dual-core system with four GBs of RAM, it would also be cool to be able to edit documents without it taking all day for them to load.

Should you steer clear of the VIA setups? For me, I break it down this way. Never buy from an OEM unless they are also providing you with aftermarket support. If this is too much trouble, then you need to think the hardware you are about to select.

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[Source: Linux Blogs2k - Posted by FreeAutoBlogger]

Firewall with iptables using mac address filtering

2009-07-08T03:22:00.001Z

There are times when you might need to filter the traffic on your firewall using MAC addresses instead of IP addresses, iptables has the option to do it.

From the man page of iptables:

Note that this only makes sense for packets coming from an Ethernet device and entering the PREROUTING, FORWARD or INPUT chains.

You may want to insert this line in you firewall script.

iptables -A INPUT -m mac –mac-source 00:11:2f:8f:f8:f8 -j DROP

This way the packets comming from the network element with the MAC address 00:11:2f:8f:f8:f8 will be denied.

That is if you want to block the incoming packets to the firewall, but the blocked machine may still be able to send packets across the firewall, so to block those packets, you may want to add also this line.

iptables -A FORWARD -m mac –mac-source 00:11:2f:8f:f8:f8 -j DROP

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[Source: Linux Blogs2k - Posted by FreeAutoBlogger]

Paragon NTFS For Linux v2.0

2009-07-08T00:22:00.001Z

Paragon NTFS for Linux gives transparent access to any NTFS partition under Linux OS so you and any application can browse these drives, read and change files, and copy and create new files and folders.

This download package is free and contains full functional Paragon NTFS for Linux drivers for the most popular Linux distributions with their default kernels only. This package contains a demo version for any Linux distribution as well.

[2M] [Linux kernel 2.6.X] [FREE]

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[Source: Linux Blogs2k - Posted by FreeAutoBlogger]

…and Refactoring for All

2009-07-07T18:21:00.001Z

Hello everybody, I should introduce myself first: I am Ramn Zaraza, I am a GSOC student working on C++ refacoring support for KDevelop. I am very pleased to be contributing to KDE and the community, and want to make us the best we can be!

State of things:
To be honest things are not going good For lots of different reasons progress has been stagnant on the project. There have been changes in the plan, and now focus will switch to do refactoring on a more textual level (instead of the initially planned purely conceptual level). I am currently working on the refactor framework, and a refactoring concept to “make a class implementation private” or as it is known in QT and KDE: the ‘d’ pointer.

What to do now?
Well I have met up seriously with my mentor, and we have discussed in what direction things should go now. Some more code cleanup is required, unit tests need to be set up, and fix a few bugs to be in track again. Focus will switch to implement refactor concepts only until we have a decent enough framework, so concept implementation can become easier

Track plan:
Merge branch into trunk
Set up unit-testing environment
Hunt down selection context bug
commit first iteration of MakeImplementationPrivate
Implement temporary file changes and reparse of DuChain/AST

This last task seems quite complex, so more collaboration with the kdevelop team will be needed, however it is essential for any kind of decent refactoring concept

More details as they arrive!

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[Source: Linux Blogs2k - Posted by FreeAutoBlogger]

…and Refactoring for All

2009-07-07T15:20:00.001Z

This last task seems quite complex, so more collaboration with the kdevelop team will be needed, however it is essential for any kind of decent refactoring concept

More details as they arrive!

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[Source: Linux Blogs2k - Posted by FreeAutoBlogger]

Slackware.Com Down

2009-07-07T12:20:00.001Z

The main site of Slackware is currently down since few days ago and i still don’t know when will it be up again, but don’t worry. I believe that Pat and the Crew will do their best to restore the website again and they will come up with better services in the future. Also let’s hope when the Changelog is up again, it will be filled with updates from the latest development cycle of Slackware-Current.

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[Source: Linux Blogs2k - Posted by FreeAutoBlogger]

NVIDIA Chooses Windows CE

2009-07-07T03:19:00.001Z

NVIDIA has made their choice, they decided that Windows CE is where they want their names attached for the Tegra netbooks. My take? Who cares. It seems silly to continue on with those pointless “boycott NVIDIA” rants that we see everywhere when the fact of the matter is, going with ATI is not really “better”. No, I say good for them. If they feel that Windows CE (not Win Mobile) is where they want to be, whoopie for them.

Frankly with as much trouble as NVIDIA has with drivers on any platform, I doubt it will matter much anyway. I have not been able to remember a single new Windows release in which NVIDIA wasn’t dead last in getting it right. Actually, the truth is that NVIDIA has seen better support on Linux in not screwing up than it has on Windows, but this is just my own experiences with countless cards and PCs.

NVIDIA knows full well that Windows CE is a “safe” bet for them. Because Windows is expected to be a market leader with netbooks, NVIDIA is following the money and leaving common sense at the back of the bus as per usual. So good luck to the video card maker, supporting a Windows styling that has been plagued with issues over the years. From what I understand, this release of Windows CE is “different”. Well again, good luck with that.

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[Source: Linux Blogs2k - Posted by FreeAutoBlogger]

NVIDIA Chooses Windows CE

2009-07-07T00:19:00.001Z

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[Source: Linux Blogs2k - Posted by FreeAutoBlogger]

What Hot Tub Magazine

2009-07-06T21:18:00.001Z

What Hot Tub Magazine, the magazine for the discerning Kubuntu contributor.

The things you find in airport lounges…

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[Source: Linux Blogs2k - Posted by FreeAutoBlogger]

Linux Foundation Announces LinuxCon Keynotes

2009-04-22T18:47:00.001Z

Linux Foundation Announces LinuxCon Keynotes

The first-time Linux event welcomes industry experts to share latest advancements and opportunities for the platform

SAN FRANCISCO, April 22, 2009 The Linux Foundation (LF), the nonprofit organization dedicated to accelerating the growth of Linux, today announced confirmed keynotes for the years highly anticipated LinuxCon. LinuxCon combines the developer and end user communities to produce more than 75 sessions that address all matters Linux. The event takes place September 21 23, 2009 in Portland, Oregon at the Marriott Downtown Waterfront.

The LinuxCon keynotes represent both community and industry, with community luminaries such as Mark Shuttleworth and industry experts such as IBMs Bob Sutor. Confirmed keynotes include:

Joe Zonker Brockmeier, openSUSE community manager, Novell;
Bdale Garbee, open source & Linux chief technologist at Hewlett Packard, and well-known kernel developer;
Mark Shuttleworth, founder of the Ubuntu distribution and Canonical; and
Bob Sutor, vice president of Standards and Open Source at IBM.

LinuxCon welcomes everyone who has a stake in Linux. Linux users and developers will meet and learn from their peers as well as teach others, such as up-and-coming developers and new Linux users. LinuxCon eliminates the traditional tradeshow environment to provide a forum where attendees can educate themselves on the latest technical advances of the Linux platform.

Three tracks developer, business and operations will provide the foundation for sessions that include tutorials, keynotes, a technology showcase and targeted mini-summits on topics such as mobile, desktop and embedded, and much more. LinuxCon will be co-located with the annual Linux Plumbers Conference (LPC), which attracts a star-studded pool of technical talent.

Registration is now open for LinuxCon. Early Bird registration costs $299 per person (until June 1, 2009), and Standard registration costs $399 (until August 14, 2009).

To get additional details or register for the event, please visit the LinuxCon website. To get updates via Twitter, follow the Linux Foundation here.

Linux Foundation events provide kernel developers, IT professionals, end users, senior executives, industry experts, and the media with a vendor-neutral, nonprofit forum in which collaboration and education advance knowledge and accelerate the advancement of Linux. The events provide a platform for new Linux and open source developments to be revealed and discussed.

About the Linux Foundation
The Linux Foundation is a nonprofit consortium dedicated to fostering the growth of Linux. Founded in 2007, The Linux Foundation sponsors the work of Linux creator Linus Torvalds and is supported by leading Linux and open source companies and developers from around the world. The Linux Foundation promotes, protects and standardizes Linux by providing unified resources and services needed for open source to successfully compete with closed platforms. For more information, please visit www.linuxfoundation.org.

###

Trademarks: The Linux Foundation and Linux Standard Base are trademarks of The Linux Foundation. Linux is a trademark of Linus Torvalds. Third party marks and brands are the property of their respective holders.

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[Source: Linux Blogs2k - Posted by FreeAutoBlogger]

Indonesian Slackbasics-i18n Project

2009-04-22T09:45:00.001Z

This morning, i have added all the skeleton files for Indonesian Slackbasics-i18n project which i copied from the English version. All the files are ready to be translated and by this post, i invite all of Indonesian Slackware users to join this project and finish up this translations so that it could be used by any other Indonesian Slackware users.

For now, my focus is to move translated files from our repository in Slackware.Linux.Or.Id into Google Code. This will take some time, as we didn’t translate the XML files, but we generated the HTML files and we translated the HTML files.

This project are hosted at Google Code and it will use SVN as the collaboration tools. You can see the information on how to obtain the sources here.

Thanks to Marcelo Andrade for inviting me into this project and i hope more translations will come in the future.

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[Source: Linux Blogs2k - Posted by FreeAutoBlogger]

KDE 4 Cube without compiz (Eye Candy)

2009-04-22T06:45:00.001Z

I have installed KDE 4 on Arch Linux, it is the version 4.2, and I have installed it from the official repositories.

It is as simple as:

sudo pacman -S kde

And here is the result.

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[Source: Linux Blogs2k - Posted by FreeAutoBlogger]

KDE 4 Cube without compiz (Eye Candy)

2009-04-22T03:45:00.001Z

I have installed KDE 4 on Arch Linux, it is the version 4.2, and I have installed it from the official repositories.

It is as simple as:

sudo pacman -S kde

And here is the result.

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[Source: Linux Blogs2k - Posted by FreeAutoBlogger]

Slackbasics-i18n

2009-04-22T00:44:00.001Z

Marcelo Andrade, one of the Portuguese translator for SlackBasics has offered me to join the Slackbasics-i18n project as Daniel is no longer a Slackware users so he gave the management of SlackBasics.org to Marcelo. This project will host translations for SlackBasics which was originally done by Daniel.

I took the offer and i will handle the Indonesian version. I have given the admin right for now, but i’m a little bit busy this days, so it might take few days to add Indonesian translation to the site and when it’s done, it can be accessed anywhere via SVN access described here.

Also i was given a new mail address at willy@slackbasics.org. Thanks to Marcelo for all his efforts

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[Source: Linux Blogs2k - Posted by FreeAutoBlogger]

Even though you know it’s coming it’s never something you really want to happen…

2009-04-21T21:44:00.001Z

Well, today I was let go after being at Platform Computing working on our Open Source software for almost 5 years. It’s been one of those up and downer days. I read the FLOSS blog postings from all the different communities and see people being let go and now I’m one of them

The writing was on the wall though for months, it’s not like I didn’t know this would happen. I just wanted to deny that It could happen, but it has happened.

So, for now. I will not be dedicating much time to KDE while I try to find new work elsewhere. I don’t look at this as a sad day, but as a new beginning for me…

If anyone wants to hire a pretty smart Linux guy, please contact me

Shawn.

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[Source: Linux Blogs2k - Posted by FreeAutoBlogger]

Security Update: udev

2009-04-21T15:43:00.001Z

Another security update has been released on -Current branch along with several other fixes in a/ directory. Here are the latest -Current changelog:

Mon Apr 20 23:38:45 CDT 2009
a/etc-12.34567890-noarch-3.tgz: Added the uucp user to the dialout group.
a/mkinitrd-1.3.3-i486-3.tgz: Fixed broken directory in initrd-tree.tar.gz.
Thanks to Malcolm Rowe for the bug report.
a/pkgtools-12.34567890-noarch-3.tgz: Fixed upgradepkg oldpackage%newpackage.
Fixed the installpkg test for the external compression utility.
Thanks to Robby Workman.
a/pcmciautils-015-i486-2.tgz: Added symlinks to /sbin/* in /lib/udev (needed by the udev rules file). Fixed installation of udev rules file.
Thanks to Robby Workman.
a/udev-141-i486-1.tgz:
Upgraded to udev-141.
Changed serial devices from group ‘uucp’ to group ‘dialout’.
This upgrade fixes a local root hole and a denial of service issue.
For more information, see:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-1185
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-1186
(* Security fix *)
l/pilot-link-0.12.3-i486-7.tgz: The dialout devices now use group ‘dialout’ rather than group ‘uucp’, and the udev rules have been changed to use MODE=”660″ instead of MODE=”664″. Thanks to Robby Workman.

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[Source: Linux Blogs2k - Posted by FreeAutoBlogger]

I Used To Be Hardcore

2009-04-21T09:43:00.001Z

I used to be hardcore…

I ran Slackware when it was on 400 floppies. I ran the 1.x kernel. I hacked channels on efnet in IRC for bragging rights. I waited all day long for wavs to download from a BBS. My game of choice used to be a MUD.

We grow up, we move on, and we get accustomed to a new standard.

It’s like that isn’t it? As time goes on, the standard is raised higher and we grow accustomed to a base level. Much like the 2.4 kernel was for Linux…it really moved things forward from previous kernels. It’s like the high jump in track and field…jumping 5′8″ isn’t that big of deal…but once you hit 5′10″ and above, you’re sailing.

Linux has had a new standard go into effect in the past few years…mostly since 2007 and the 2.6.18 and above kernels. We’ve come to expect more from our operating system and for good reason. I for one, am glad that the standard is raised a notch with each iteration…it gives us something to aspire to. It gives us measured steps from which to guage ourselves by. Hopefully, with each step forward, improvement comes without regression.

Lately, I’ve become concerned about regression. I’ve noticed quite a few major distributions are not able to boot a standard Dell Latitude laptop…some taking as long as 20 minutes to boot (yes, 20 minutes…I’m looking at you Fedora 10). I can’t help but wonder, are we taking steps backwards? Is this the portion of time where we take one step backward followed by 2 steps forward? Or is this the time where the kernel becomes TOO big? I hope it’s the former. And I hope that my concern is misplaced.

Thinking of all these things and what I’ve become accustomed to…I don’t feel hardcore anymore. And then I go and hack a python script to update twitter because I can and all is right again…I might as well be riding a Harley.

Just a few thoughts on this sleepless night…

Tell Others About This!

Slackware 10.2 Tips and Tricks Want to Install the 2.6.13 Kernel is Slack but…
Install the Latest Kernel in PCLinuxOS Do you run PCLinuxOS 2007 or Minime 2008 and would…

I Used To Be Hardcore - Yet Another Linux Blog

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[Source: Linux Blogs2k - Posted by FreeAutoBlogger]

Firefox To Snub Some Older Windows Installs

2009-04-21T00:41:00.001Z

Mozilla has been a brand to watch for many years now, as has their flagship product, Firefox. But there is always a sadness where there is talk of no longer supporting older OS releases. Today I learned that Mozilla is considering no longer supporting Windows 2000. Okay, this seems reasonable to forgo this. However hearing that along with this, we would also see support for un-updated XP installations suddenly makes me glad that I am a Linux user.

It seems that with the upcoming releases of Firefox, there will be a move to the later version of the Gecko engine. And this means that Mozilla feels this is a good time to upgrade their own support policies to match what is being seen by the operating systems they are supporting. This means XP SP3 and above users will be fine. Anything older than this, you will be out of luck.

Where Mozilla is seeing a lot of heat from this, is in the fact that so many people are not updating their old XP installs. Many of them are not even using SP1, much less version 3. So there is concern this will hinder Firefox upgrades because of this.

As far as I am concerned, I say too bad. If someone tries to upgrade their Firefox install, is (hopefully) told that they need to be running the latest Windows updates, then I fail to see a problem here? If anything, this could be the kick we need to get those Windows users to keep their machines up to date! But that is just my perspective.

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[Source: Linux Blogs2k - Posted by FreeAutoBlogger]

Final CD Testing

2009-04-20T21:41:00.001Z

Testers are needed for the proposed CD and DVD ISOs for the final Kubuntu 9.04 Release. Upgrades from 8.10 and 8.04 need testing too. Report your results on ISO testing and #kubuntu-devel.

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[Source: Linux Blogs2k - Posted by FreeAutoBlogger]

Final CD Testing

2009-04-20T18:41:00.001Z

Testers are needed for the proposed CD and DVD ISOs for the final Kubuntu 9.04 Release. Upgrades from 8.10 and 8.04 need testing too. Report your results on ISO testing and #kubuntu-devel.

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[Source: Linux Blogs2k - Posted by FreeAutoBlogger]

Six Linux softphone’s list

2009-04-20T06:39:00.001Z

VoIP has improved a lot since its first days, today a lot of multinational business are using it as a reliable way to keep stay in touch.

With more and more telecommuters, and business man working, and with cell phone roaming costs still high, VoIP is a real option for both big and small corporations.

And when you talk to a CFO about investing to save costs, you usually will see the checkered flag for your project.

Most of these projects will involve IP phones or ATAs, but you may use softphones too, which are very convenient for the traveler guy, here we will review some of the soft phones available for Linux.

Linphone

Linphone is a mature piece of software, it uses SIP, for voice and video over IP, it can work as a stand alone application, and you can call other sip enabled devices just entering its ips on the dial window of Linphone, or you can configure it to use an Asterisk PBX.

There are binary packages for the most common distros, so try to install it using you package manager.

Ekiga

Ekiga, is the softphone for Gnome Desktop, it supports both SIP and H.323, also has support for webcams if you kernel recognize yours.

As with Linphone you may use Ekiga standalone, or with a softswitch, you can also create an account using the Ekiga configuration druid, but over all, it is a great soft phone to be used with Asterisk.

Here is a screencast to learn how to configure it, to work with Asterisk.

Twinkle

Twinkle is another great SIP softphone, which can be easy used with Asterisk, or any other SIP gateway, it is easy to configure, supports STUN server, NAT traversal, Instant messaging, and as the others, can be used in a phone to phone configuration, or using a Gateway / SIP registrant.

Check here to learn how to configure it:

Kiax

Kiax is an IAX softphone, so it is intended only for use with Asterisk, its configuration is really simple, but keep in mind that you need to create the username in the iax.conf file, instead of the sip.conf file to be able to use this softphone, it is really a good option if you are working with Asterisk.

Skype

Skype is a closed softphone, it means you may not use it with any gateway, it uses a proprietary protocol, and only works with the skype Network skype site, but it lets you add contacts, call them by free, or chat with them.
You may also call land lines and cell phones using a credit card or paypal to add credit to your account, the rates are really low compared with normal Telco rates, as there is versions for Windows and Mac, it is widely used, and maybe the most popular softphone, it also has the advantage that you do not need to configure your own PBX.

Gizmo

Gizmo is another network like Skype, but the good thing is that its softphone also support SIP configuration, and can be connected to an Asterisk PBX, while using its own network!, you may also configure is with your favorite IM network, MSN, Yahoo messenger, etc.

The configuration is really easy, and you add credit to call to outside numbers, using its network, or use you own PBX to make those calls, I really recommend the use of this software, which can be downloaded from gizmo.com you can also download versions for cell phones, if you are using Ubuntu it is in medibuntu repository, if are using Crunchbang Linux you just have to install it with:

sudo aptitude install gizmo5

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[Source: Linux Blogs2k - Posted by FreeAutoBlogger]

Six Linux softphone’s list

2009-04-20T00:38:00.001Z

VoIP has improved a lot since its first days, today a lot of multinational business are using it as a reliable way to keep stay in touch.

With more and more telecommuters, and business man working, and with cell phone roaming costs still high, VoIP is a real option for both big and small corporations.

And when you talk to a CFO about investing to save costs, you usually will see the checkered flag for your project.

Most of these projects will involve IP phones or ATAs, but you may use softphones too, which are very convenient for the traveler guy, here we will review some of the soft phones available for Linux.

Linphone

There are binary packages for the most common distros, so try to install it using you package manager.

Ekiga

Ekiga, is the softphone for Gnome Desktop, it supports both SIP and H.323, also has support for webcams if you kernel recognize yours.

Here is a screencast to learn how to configure it, to work with Asterisk.

Twinkle

Check here to learn how to configure it:

Kiax

Skype

Gizmo

sudo aptitude install gizmo5

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[Source: Linux Blogs2k - Posted by FreeAutoBlogger]

OpenOffice.org as an Outliner

2009-04-19T06:36:00.001Z

I was never a hardcore user of OpenOffice.org but I do need it from time to time because of the documents I need to write.

OpenOffice.org

There are a lot of people in my office who prefer to use it for everything. Although one thing I’ve noticed is that they just open it as if it’s any other text editor. But I don’t think they’ve seen it as an outliner before.

Dmitri Popov of Linux Magazine has shared tips for us on how to use OpenOffice.org as an outliner:

The easiest one is to press the Numbering On/Off button in the main toolbar or the F12 key. This turns the current line in the documents into a numbered entry and displays the Bullets and Numbering context toolbar which offers basic outlining tools.
….
Another approach requires a bit more work, but it allows you to use OpenOffice.org Writer as a two-pane outliner. This solution is based on the Outline Numbering feature which lets you specify a hierarchy of heading styles and then manage them using the Navigator. By default, OpenOffice.org Writer uses the built-in heading styles (i.e., Heading 1, Heading 2, Heading 3, etc.) for each level, but you can easily change that using the Tools -> Outline Numbering dialog window.

Two options to help us use OpenOffice.org in a different way. I personally like outliners like emacs-org mode because it helps me organize my thoughts better. I also help write training materials so this is a great help to me.

For those of you who like making lists, check this out. These awesome tips might help you work better with an existing application instead of downloading a separate outliner.

Again, thanks to Dmitri Popov for the tips!

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[Source: Linux Blogs2k - Posted by FreeAutoBlogger]

Custom Distros — Every distro should be custom

2009-04-18T21:34:00.001Z

I can’t remember how, but I stumble upon this nice site, it seems to be new, as its oldest post is from April 9, 2009.

I like that almost every post has a webcast in upper-right corner, it combines some good opinion posts, with how-tos, and also applications lists’ posts.

So if he keeps the pace, we have seen the birth of another great Linux blog, the user is now using Arch Linux and recently switched from Gnome to KDE.

Check it out andsubscribe to its news

You may say “hey is not there enough Linux blogs out there?”, I think not, we need them, we need to spread the word, and people like the author of Custom Distros are the needed men.

Read the coming post of this minimalistic look Linux blog, and enjoy its videos.

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[Source: Linux Blogs2k - Posted by FreeAutoBlogger]

Fine tune your Linux command line History

2009-04-18T18:34:00.001Z

Introduction

History is one of the Linux commands I use the most, maybe I am too lazy to write a command again, so I keep looking in the history log for commands even as short as:

sleep 5 && s2disk

Which hibernate my Laptop after five seconds, so, continuing with my series of posts about History, I will write this time about histcontrol variable.

This environment variable, will control how history stores the commands you enter in the shell.

Options

There are four options at which this variable could be set, and also the unset position, the four possible set positions are:

ignorespace: Which make that any command entered in the shell starting with a space will not be stored in the history log.
ignoredups: When set to this value, history will only save the first occurrence of a given command, and not all repetitive ones, i.e., if you enter
free
And the using the arrows, run it again, and again, and again, history will only save the first one, and not all others.
ignoreboth: Is a combination of the two above
erasedups: Will make History to erase the previous occurrence of a command when it is entered again.

How to use it

You just need to set the variable in your environment using:

export HISTCONTROL=ignoredups

or put a line like the one below in your .bashrc file in your home directory.

export HISTCONTROL=erasedups

Examples

ignorespace

export HISTCONTROL=ignorespace

Output:

ggarron@gentoo ~/Desktop $ history | tail -6  510  history  511  export HISTCONTROL=ignorespace  512  history | tail -6  513  clear  514  history | tail -6  515  history | tail -6ggarron@gentoo ~/Desktop $  lsarchlinux-2009.02-2-ftp-i686.img.torrentggarron@gentoo ~/Desktop $ history | tail -6  511  export HISTCONTROL=ignorespace  512  history | tail -6  513  clear  514  history | tail -6  515  history | tail -6  516  history | tail -6ggarron@gentoo ~/Desktop $

You may see that the ls command was not logged, because it has a space preceding it.

ignoredups

export HISTCONTROL=ignordups

Output:

ggarron@gentoo ~/Desktop $ export HISTCONTROL=ignoredupsggarron@gentoo ~/Desktop $ history | tail -6  514  history | tail -6  515  history | tail -6  516  history | tail -6  517  clear  518  export HISTCONTROL=ignoredups  519  history | tail -6ggarron@gentoo ~/Desktop $ lsLinux-101-Hacks.pdf  archlinux-2009.02-2-ftp-i686.img.torrentggarron@gentoo ~/Desktop $ lsLinux-101-Hacks.pdf  archlinux-2009.02-2-ftp-i686.img.torrentggarron@gentoo ~/Desktop $ lsarchlinux-2009.02-2-ftp-i686.img.torrentggarron@gentoo ~/Desktop $ history | tail -6  516  history | tail -6  517  clear  518  export HISTCONTROL=ignoredups  519  history | tail -6  520  ls  521  history | tail -6ggarron@gentoo ~/Desktop $

You may see that only one occurrence of ls was logged.

erasedups

export HISTCONTROL=erasedups

Output:

ggarron@gentoo ~/Desktop $ export HISTCONTROL=erasedupsggarron@gentoo ~/Desktop $ history | tail -6  513  clear  514  export HISTCONTROL=ignoredups  515  ls  516  clear  517  export HISTCONTROL=erasedups  518  history | tail -6ggarron@gentoo ~/Desktop $ lsarchlinux-2009.02-2-ftp-i686.img.torrentggarron@gentoo ~/Desktop $ history | tail -6  471  clear  472  export HISTCONTROL=ignoredups  473  clear  474  export HISTCONTROL=erasedups  475  ls  476  history | tail -6ggarron@gentoo ~/Desktop $

You may see that the ls command between clear and export HISTCONTROL=ignoredups with the number 515, was deleted, and now we have the 475, you may also note that a lot of occurrences of ls have been deleted as my log went from 518 commands recorded to 476!

Previous posts about history

[CRTL+R] Search in your last used commands
Small tip - Call a command from history
history, a command to display your last used commands
Navigate on Linux command shell history

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[Source: Linux Blogs2k - Posted by FreeAutoBlogger]