Revisiting Linux Part 1: A Look at Ubuntu 8.04
by Ryan Smith on August 26, 2009 12:00 AM EST- Posted in
- Linux
Things That Went Right
On the flip side of the things that went wrong, we have the things that went right. Most of the Ubuntu experience went right and has been covered previously, so this is going to be a catch-all for other things about Ubuntu that impressed me, but don’t necessarily fit anywhere else.
One of the nicer features of Mac OS X that you don’t see mentioned very much is the Keychain, a credential management framework for applications to use to securely store passwords and the like. Such systems aren’t rare – even Windows has something similar through its Credentials Manager – but Mac OS X is unique in that its implementation at least gets used, at times.
I had not been expecting something similar in Ubuntu, so it caught my eye when a Mac OS-like password box came up when I was logging in to my file server. As it turns out Ubuntu has similar functionality through the Passwords and Encryption Keys application. And since Ubuntu heavily uses the GNOME desktop environment that this application is a part of, a number of its applications are built against the keyring and use it.
It’s not quite as tightly woven as Keychain is under Mac OS X, but it’s better utilized than Windows and used enough that it makes sense to visit the keyring application. The biggest holdout with a stock install is Firefox, which uses its own password manager regardless of what platform it’s on.
Another thing that caught my eye was Ubuntu’s archive manager, called File Roller here. As we’ve lamented many, many times before, Windows’ archive management abilities are terrible. Files are slow to compress, files are slow to uncompress, and just supporting Zip files isn’t quite enough. Mac OS X does a bit better by being faster, but it also has absolutely no support for browsing Zip archives, it just packs and unpacks them. Most power users I know will have something like WinRAR or BetterZip installed to get a proper archive browser and wider archive support.
File Roller is a complete archive manager, and it supports slightly more exotic archive formats like RAR along with the customary Zip and *nix standard of GZip. The biggest knock against it when it comes to archive formats is that it can read more than it can write, RAR again being the example here.
This also brings up an interesting quirk with archives under *nix that you don’t see under Windows. The Zip format specifies it as being both a container for multiple files and a compressor for those files. GZip on the other hand can only compress a single file – so when it comes time to compress multiple files, they must first be packed in a compressionless tarball (TAR), and then the tarball is compressed, resulting in .tar.gz. The quirk is that the Zip format compresses each file separately, while .tar.gz by its very nature compresses all the files together at once; this is commonly known as solid archiving.
Depending on the files being compressed, solid archives can have significant space advantages over individually compressed files by taking advantage of redundancy between the files themselves, and not just the redundancy in individual files. This is also why WinRAR is so common on Windows machines, since the RAR format supports solid and individual archiving.
Now the downside to solid archiving is that it takes longer to pull a file out of a solid archive than an individually compressed archive, since everything ahead of the file must be decompressed first in order to retrieve the data needed to recreate the desired file. So solid archiving isn’t necessarily the best way to go.
Ultimately with the wider support for archive formats under Ubuntu, in some situations it can achieve much better compression ratios than what can be done under Windows. Windows isn’t entirely helpless since when it comes to installers they can use MSI installers (which use solid compression), but as far as plain archives are concerned the only built-in option is individual archiving. It’s a small benefit that can pay out nicely from time to time for Ubuntu.
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LittleMic - Wednesday, August 26, 2009 - link
http://en.wikipedia.org/wiki/NTFS_symbolic_link">http://en.wikipedia.org/wiki/NTFS_symbolic_linkWell, Windows 2000 had symbolic links for a long time :-p (only for directory until Vista though)
ekul - Wednesday, August 26, 2009 - link
ntfs has symlinks but the windows shell can't create or manipulate them. Pretty pointless. MS can (and does) use them in vista/7 but you can't make your ownEeqmcsq - Wednesday, August 26, 2009 - link
"hint: symlinks are your best friend. My home dir is littered with links to places on the filesystem I visit a lot to avoid a lot of clicking/typing"I use Gnome's bookmarks for that. Those bookmarks even include SMB shares on my other computers.
ekul - Wednesday, August 26, 2009 - link
gnome bookmarks are very handy I just find symlinks to be more flexible since they work regardless of gnome vs kde, gtk vs qt and gui vs cli. Even wine can take advantage of themjigglywiggly - Wednesday, August 26, 2009 - link
one more thing you should have covered is battery life on laptops. Linux in general is pretty awful at managing battery life. Just web browsing 4 hrs on Vista on my vostro 1310(not using 7) but with Ubuntu 2 1/2. It's a huge difference, but oh well.Ryan Smith - Wednesday, August 26, 2009 - link
Laptops are out of our domain, that would be Jarred. If this two-part series is successful, I'll see what I can do about talking him in to putting some Ubuntu (or any Linux for that matter) battery benchmarks in. But I'm told a complete workup takes a while.strikeback03 - Wednesday, August 26, 2009 - link
On my Thinkpad T43, battery life is essentially equal between XP and Ubuntu. Ubuntu may even be slightly better, though I have never bothered with a formal test to put real numbers on both. Have you looked at whether the processor is throttling down properly or not while in Ubuntu?sprockkets - Wednesday, August 26, 2009 - link
"Now we have yet to touch on hardware accelerated playback, which is something we’re going to hold off on until we take a look at Ubuntu 9.04. Linux does not have a common media framework like Windows and Mac OS X have DirectShow/DXVA and QuickTime respectively. Rather the desktop environment that Ubuntu is based off of (GNOME) includes a lesser framework called GStreamer, which is closer to a basic collection of codecs and an interface to them. As such hardware accelerated playback is not as easy to do under Ubuntu as it is under Windows and Mac OS X. We’ll take look at the APIs and the software for this in our look at Ubuntu 9.04."Well, not exactly. There is this: http://en.wikipedia.org/wiki/VaAPI">http://en.wikipedia.org/wiki/VaAPI, which is not exactly widespread yet. nVidia's VDPAU, which provides hardware acceleration for h.264 and if you have the latest version of PureVideo in your card, it does VC-1 as well. It can work with this or alone as well.
Also, while it is wacky that bin or binaries are in one spot, and lib or libraries are in another, and anything you install is in a /usr/lib/local, it does keep all related files in one spot. Keeping all your libraries registered as packages also makes it easy to repair.
Also, one click installs are possible on openSuSE as well, though it does involve a small gui process and adding a repository as well. But doesn't any program require this?
Also, I believe your problem with SMB shares is something I run into as well, but only on GNOME. On KDE, browsing shares is quite normal. Since I never bother mounting the share, I can't directly access it without KDE caching the file locally.
Isn't /home/$Your Name$ intuitive as to where your stuff would be? That is very nice, as I can keep my stuff separate from the OS, thus I can reformat the OS partition without having to touch my data. Imagine reinstalling Windows and finding all your apps working exactly as before with no work. Can OSX do that (not rhetorical)?
Ryan Smith - Wednesday, August 26, 2009 - link
VDPAU is something we'll specifically be covering in the Part 2; in fact it's what I'm working on at this moment.GeorgeH - Wednesday, August 26, 2009 - link
I'm sure the comment section will quickly be swamped with quibbles, so I just wanted to say that I found this article to be very informative, accurate (WRT my own Ubuntu experiences), and thorough. Kudos - now it's time to ask for a raise. :)