Clipmarks | Linux Clips

sudo: 使用者身份切換

Fri, 13 Nov 2009 03:47:58 GMT

clipped by: taglife
clipper's remarks: sudo： sudo 指令, visudo (/etc/sudoers) ( 帳號, 群組, 限制指令, 別名, 時間間隔, 配合 su )

Clip Source: linux.vbird.org

能否使用 sudo 必須要看 /etc/sudoers 的設定值，而可使用 sudo 者是透過輸入使用者自己的密碼來執行後續的指令串

四個元件意義是：

系統的哪個帳號可以使用 sudo 這個指令的意思，預設為 root 這個帳號；
當這個帳號由哪部主機連線到本 Linux 主機，意思是這個帳號可能是由哪一部網路主機連線過來的，這個設定值可以指定用戶端電腦(信任用戶的意思)。預設值 root 可來自任何一部網路主機
這個帳號可以切換成什麼身份來下達後續的指令，預設 root 可以切換成任何人；
可用該身份下達什麼指令？這個指令請務必使用絕對路徑撰寫。預設 root 可以切換任何身份且進行任何指令之意。

%wheel ALL=(ALL) ALL <==大約在 84 行左右，請將這行的 # 拿掉！ # 在最左邊加上 % ，代表後面接的是一個『群組』之意！

限制使用者的指令參數！修改的方法為將上述的那行改一改先：

[root@www ~]# visudo  <==注意是 root 身份
myuser1	ALL=(root)  !/usr/bin/passwd, /usr/bin/passwd [A-Za-z]*, \
                    !/usr/bin/passwd root

由於螢幕一行寫不完，我將這行寫成兩行，所以上面第一行最後加上反斜線囉。加上驚嘆號『 ! 』代表『不可執行』的意思。因此上面這一行會變成：可以執行『 passwd 任意字元』，但是『 passwd 』與『 passwd root 』這兩個指令例外！如此一來 myuser1 就無法改變 root 的密碼了！這樣這位使用者可以具有 root 的能力幫助你修改其他用戶的密碼，而且也不能隨意改變 root 的密碼！

Tags: sudo, sudoers, visudo, linux

Help Save The World with Your Computer - Interested?

Fri, 13 Nov 2009 03:44:07 GMT

clipped by: nedhamson1
clipper's remarks: Long ago, I participated in a global network doing computations for the genome project. Now you can lend your down time on your computer to fight AIDS, MS and work on clean energy. IBM is hosting. Window, Linux and Mac systems welcome!

Clip Source: www.worldcommunitygrid.org

We're helping develop
new AIDS treatments.

What are you doing?

Why not donate your unused computer time to World Community Grid and the FightAIDS@Home project to find better treatments for AIDS? Currently there is no cure, but together we can find better treatments faster.�� Learn More

Donate the power of your computer when it is turned on, but is idle, to projects that benefit humanity! We provide the secure software and system that does it all for free, and you become part of a community that is helping to change the world. Once you install the software, you will be participating in World Community Grid.

How You Can Help

Tags: ayuda, earth, global aid, help

Online UNIX Training

Thu, 12 Nov 2009 09:48:41 GMT

clipped by: shilpajohn24
clipper's remarks: Learningdom’s Unix/Linux fundamentals course is designed to help beginners become expert UNIX users by making them learn the basic commands of UNIX system. We also offer courses on SUSE, Centos, UNIX administration & Redhat Linux.

For More Information visit at :-

Quick test pro training
Online testing Training

Clip Source: www.learningdom.com

I HAVE GREAT EXPERIENCE FROM TAKING THIS ONLINE COURSE AND HAVE LEARNED A LOT. THE COURSE MATERIAL WAS EXPLAINED IN DETAIL AND AWESOME PRESENTATION. I FEEL VERY CONFIDENT. GANESH, THANKS FOR EVERYTHING. YOUR RESPONSE TO QUESTIONS AND YOUR GUIDANCE, MAKES THE ENTIRE TRAINING A PLUS.
VA
-by By Shara teli

Excellent training!!!

Hi Raksha,
My course will be ending this weekend. I have attented the classes for last three months and really I learned a lot. Every topic in the tutorials, was clearly explained. Your classes were amazing.
Great Job!
Thanks,
-By Rachna Chaurasia

Great Job!

Tags: quick test pro training, sql tutorial online

LVM: Logical Volume Manager 邏輯捲軸管理員

Thu, 12 Nov 2009 03:46:20 GMT

clipped by: taglife
clipper's remarks: http://linux.vbird.org/linux_basic/0420quota.php#lvm

Clip Source: linux.vbird.org

LVM 的重點在於『可以彈性的調整 filesystem 的容量！』而並非在於效能與資料保全上面。

LVM 可以整合多個實體 partition 在一起，讓這些 partitions 看起來就像是一個磁碟一樣！而且，還可以在未來新增或移除其他的實體 partition 到這個 LVM 管理的磁碟當中。

LVM 的全名是 Logical Volume Manager，中文可以翻譯作邏輯捲軸管理員。

LVM 的作法是將幾個實體的 partitions (或 disk) 透過軟體組合成為一塊看起來是獨立的大磁碟 (VG) ，然後將這塊大磁碟再經過分割成為可使用分割槽 (LV)，最終就能夠掛載使用了。但是為什麼這樣的系統可以進行 filesystem 的擴充或縮小呢？其實與一個稱為 PE 的項目有關！

Tags: linux lvm partition filesystem

Godaddy Deluxe hosting

Thu, 12 Nov 2009 03:43:32 GMT

clipped by: hostingdedi
clipper's remarks: The GoDaddy Deluxe Plan is the second level plan offered under the Godaddy Hosting packages. As with all other hosting plans; the Deluxe plan too comes with 99.9% uptime guarantee.

Clip Source: www.hostingcoupons.org

Godaddy Hosting Deluxe Plan

The GoDaddy Deluxe Plan is the second level plan offered under the Godaddy Hosting packages. As with all other hosting plans; the Deluxe plan too comes with 99.9% uptime guarantee, 24/7 support, Google Webmaster tools and many powerful features. The plan is fully compatible for both Windows and Linux users.

Tags: godaddy, hosting, hostingcoupons, web hosting, server

linux hosting

Wed, 11 Nov 2009 14:53:08 GMT

clipped by: firicelmirel
clipper's remarks: Since our site includes TELNET technology we should check these linux hosting services first.

Clip Source: www.webhostingreport.com

Linux Web Hosting

Tags: linux

Linux distribution id

Mon, 09 Nov 2009 13:04:17 GMT

clipped by: qbitr8
clipper's remarks: Find the distribution and version, esp. Ubuntu

Clip Source:

cat /etc/issue

Five Best Antivirus Applications

Mon, 09 Nov 2009 09:34:24 GMT

clipped by: jarek69

Clip Source: lifehacker.com

Five Best Antivirus Applications

Avast! (Windows/Linux, Basic: Free, Premium $39.95 per year)

Microsoft Security Essentials (Windows, Free)

Avira (Windows, Basic: Free, Premium: $30 per year)

ESET NOD32 Antivirus (Windows, $39.99 per year)

AVG (Windows, Basic: Free, Premium: $54.99 per year)

Tags: anivirus, best, windows, win, virus

Workrave - תוכנה לאנשים שיושבים הרבה מול מחשב

Mon, 09 Nov 2009 09:08:33 GMT

clipped by: osaris

Clip Source: www.workrave.org

Work

rave

Workrave is a program that assists in the recovery and prevention of Repetitive Strain Injury (RSI). The program frequently alerts you to take micro-pauses, rest breaks and restricts you to your daily limit. Please refer to the feature comparison for a complete list of features, and how the program performs with respect to other programs on the market. The program runs on GNU/Linux and Microsoft Windows.

Linux on PS3 - Is it Possible? Yeah!

Sun, 08 Nov 2009 19:35:05 GMT

clipped by: brada7x

Clip Source: www.articlesbase.com

Linux on PS3 - Is it Possible? Yeah!

Are you trying to figure out how to put Linux on PS3? Who isn't?

Putting Linux on any console has always been a task that was highly sought after. Why? Because one you have Linux on PS3 you can do so much more with the system that what you can with a PS3 right out the box.

Tags: linux on ps3

Secure Web Hosting Services, Business Web Hosting Providers, Linux Website Hosting Plans

Fri, 06 Nov 2009 12:40:02 GMT

clipped by: andrewbernes
clipper's remarks: Secure Web Hosting Services: We are one of the leading business web hosting providers and offering Joomla Web Hosting, Ecommerce Web Hosting, Linux Web Hosting and very low cost web hosting services with nice web hosting plans.

Clip Source: www.getsimple.net

Tags: secure web hosting services, web hosting providers, web hosting services, business web hosting services

Affordable Web Hosting Services, Joomla Web Hosting Companies, E Commerce Web Hosting Services

Fri, 06 Nov 2009 12:37:23 GMT

clipped by: andrewbernes
clipper's remarks: We offers Affordable & Reliable Web Hosting Services, E Commerce Web Hosting Services, Joomla Hosting Services, Linux Web Hosting Services, Web Page Design and also web hosting services at affordable prices.

Clip Source: www.getsimple.net

Tags: simple source solutions, affordable web hosting, web hosting services, reliable web hosting services

Web Hosting Services | Windows Hosting | Linux Hosting | E-Commerce Web Hosting Services

Fri, 06 Nov 2009 06:52:57 GMT

clipped by: carineld
clipper's remarks: Web Hosting Services - We Provide windows hosting, linux hosting, advanced domain registrations and other web hosting services. We offer the most cost effective solution for getting your presence on the Internet with speed, reliability, scalability.

Clip Source: egbsystems.com

Web Hosting

We offer the best of services in Web Hosting with guaranteed data integrity and reliability.

Windows Hosting

We provide windows hosting services plan that gives you all the features, tools and resources necessary to launch a web site, attract a new audience of potential customers and take your business to the next level of success and to maximize business profits.

We offer site management, customer support, detailed web site stats, web master, auto responders, pop mail access and e-mail support.

Tags: web hosting, domain registration, hosting services, windows hosting, linux hosting, dedicated server, application web hosting

Get Gmail Tasks on Your Desktop With Google Chrome

Thu, 05 Nov 2009 21:58:12 GMT

clipped by: merrie
clipper's remarks: Google Chrome has the slick ability to turn any page or site into its own application, similar to Fluid on Mac OS X. With Chrome, we can turn Tasks into a standalone app with just a few clicks. I find it handy to have my to-do list separate so I don’t get distracted with e-mail or Google Chat while I’m working.

More about Gmail Tasks.

Get Google Chrome.
Related Posts:

* Disable the Avira AntiVir Splash Screen at Startup
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* Create a Bootable Linux USB Flash Drive with UNetbootin
* TunesBag Stores and Shares Your Music Online " Free Invites
* TipsFor.us is now on Facebook

Clip Source: www.tipsfor.us

By Brian - TipsFor.us

I love Gmail Tasks. It’s my to-do list of choice for its simplicity, portability, and (of course) integration with Gmail. If you’re a fan of Google Chrome, you can also easily add Tasks as an application directly on your desktop.

Enable Gmail Tasks

First things first, if you have not already enabled Tasks in Gmail, it’s time to do so. Within Gmail, go to Settings –> Labs. Scroll down until you find Tasks, and switch it to Enable.

You will now find a Tasks link near your Contacts. This is all fine and dandy, but now let’s see how you can quickly make it a stand-alone application.

Integration with Google Chrome

Here’s how to do it: Launch Chrome and go to https://mail.google.com/tasks/ig. If it asks for a username and password, check the box to remember it. You should now see a full-browser version of your Tasks, but we’re not finished yet!

Go to the Page Dropdown Menu and click Create application shortcuts.

A Google Gears window will spawn.

That’s it!

More about

Tags: gmail task, google chrome

Bulk install your Favorite Apps (win & linux)

Thu, 05 Nov 2009 11:42:17 GMT

clipped by: jarek69

Clip Source: lifehacker.com

Allmyapps Bulk-Installs Your Favorite Apps, Makes System Rebuilding Less Painful

Windows/Linux: One of the most irritating things about reinstalling your operating system is installing all the non-OS applications you love. Allmyapps lets you select all your favorite apps and roll them into a bulk installer to make rebuilding easy.

At Allmyapps you can browse over a hundred popular applications in a dozen categories to build a master list of applications you want to install. You don't have to install immediately after building your list, you can save your list for later installation. Check out the video below to see how Allmyapps works:

[Video]

For another great time-saving bulk installation tool, check out previously reviewed Ninite. Have a way to get your favorite apps installed quickly? Let's hear about it in the comments.

Tags: install, apps, applications, list, linux, win