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IonutVanSet up a wireless network in the new house
As you read in my previous post , we arrived in UK already. I have internet connection at work, but I need also at home internet, because during the evening I am reading news, emails, messenger, .... I prefer now, to set up a wirelesss network for my home, because I don't like to have cables in the house.
My computers are here. For Amilo notebook I had already a PCMCIA card "Netgear WG511T" which is working fine on Windows XP, FreeBSD and Linux, Vaio notebook come with an integrated wifi card, I have installed on it Vista and I don't have problems with the wireless card, so what I needed it was a PCI/USB wireless card for the desktop computer which has to work with Linux, Windows and also *BSD operating system and also a wireless router.
Surfing on the internet, reading opinions and different forums, I decided to buy a Linksys WRT54G wireless broadband router, maybe in the future I will try to install linux on it (openwrt or something similar), and as PCI card I took Edimax EW-7128G wireless adapter which it seems that is working fine with Linux, Windows and FreeBSD/OpenBSD.
The router was very easy to set up and is working fine. I had some problems in installing the PCI wireless card on my Opensuse 10.3 box, finally it is working, I will write here a short tutorial in the next post.
I am really happy with my new wireless network.
Waiting for UBahn in Berlin
If you are wainting for UBahn and you are tired, please take a sit ...
YaST2 network, driver options
This is feature I don't really use, but some of openSUSE or SLES users does. Maybe I'll need it when I will play more with bonding devices.
Hm, feature ...
In fact it brings back functionality that there was already there. But it was done in "hwcfg" files - deprecated configuration files for hardware devices. Now that configuration is stored in /etc/modprobe.d/network. But it's probably not final solution.
Why? because all that options are stored "on one place" but options packaged by driver rpms are stored in /etc/modprobe.d/$driver_name.
Maybe in future I'll change that place or enhance functionality to work on whole directory, but I need some feedback or opinions. Are there any?
YaST2 network, bridge devices
this is my first (and very short) blog about YaST2 development.
I put some screenshots here: new features::bridge.
What is bridged network good for? Mostly for network used with virtualisation (Xen, VirtualBox, Vmware, etc.). For this purpose all virtualisation products has their own tools, configurations and scripts.
This (per-virtualisation-application) has some disadvantages:
- possible conflict between sysconfig
- not unified way how to configure
- network configuration can't be clone by AutoYaST
That's why it makes sense to be implemented in YaST
Briefed introduction : when you want for any of your hosted machine to be seen from network, create bridge attached with physical network interface and some tun device. TUN device will be attached into your virtual machine and it makes virtual hosted machine be directly connected to real LAN.
The plan is (together with bridge) to implement also support for tun/tap devices (this should be done in sysconfig first) and Xen networking to confgure all this staff in one place.
Do you like this feature? If you have any feedback, comment or enhancement request - please let me know.
How to say it?
How to say it?
main() {
printf("hello, world!\n");
}
or
>>> def hello_world():
...print "hello, world!"
...
>>> hello_world()
hello, world!
It works. ;-)
Disconnect idle users on FreeBSD
If you are trying a solution to disconnect idle users automatically from
your server, take a look at /usr/ports/sysutils/idled. Maybe also is
possible to activate this option directly in sshd but I don't find that
option. Please let me know if it is possible.
But, idled works well, and can be used with all types of user login
sessions.
Experiments with Rpm payload
KDE Project:
I appologize to everyone thinking WTF? at the following, but I have to blog
about it, otherwise I'll explode :)
This is the reference for our current payload:
-rw-r--r-- 1 coolo suse 36966400 13. Mär 09:42 coreutils-6.10.tar
8.61user 0.05system 0:08.66elapsed 99%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+11936outputs (0major+2007minor)pagefaults 0swaps
-rw-r--r-- 1 coolo suse 6110179 13. Mär 09:45 coreutils-6.10.tar.bz2.9
Then I did lzma -1 to lzma -9 and these are the numbers:
5.90user 0.04system 0:06.03elapsed 98%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+16456outputs (0major+734minor)pagefaults 0swaps
-rw-r--r-- 1 coolo suse 8423507 13. Mär 09:48 coreutils-6.10.tar.lzma.1
5.83user 0.04system 0:05.88elapsed 100%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+10720outputs (0major+3271minor)pagefaults 0swaps
-rw-r--r-- 1 coolo suse 5488129 13. Mär 09:48 coreutils-6.10.tar.lzma.2
27.11user 0.06system 0:27.23elapsed 99%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+9888outputs (0major+3118minor)pagefaults 0swaps
-rw-r--r-- 1 coolo suse 5061307 13. Mär 09:48 coreutils-6.10.tar.lzma.3
29.60user 0.09system 0:30.36elapsed 97%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+9168outputs (0major+4334minor)pagefaults 0swaps
-rw-r--r-- 1 coolo suse 4691437 13. Mär 09:49 coreutils-6.10.tar.lzma.4
42.07user 0.10system 0:42.27elapsed 99%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+8576outputs (0major+6768minor)pagefaults 0swaps
-rw-r--r-- 1 coolo suse 4385224 13. Mär 09:50 coreutils-6.10.tar.lzma.5
44.68user 0.22system 0:46.32elapsed 96%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+8256outputs (0major+11633minor)pagefaults 0swaps
-rw-r--r-- 1 coolo suse 4222761 13. Mär 09:50 coreutils-6.10.tar.lzma.6
47.24user 0.34system 0:49.82elapsed 95%CPU (0avgtext+0avgdata 0maxresident)k
8inputs+7776outputs (0major+21360minor)pagefaults 0swaps
-rw-r--r-- 1 coolo suse 3971013 13. Mär 09:51 coreutils-6.10.tar.lzma.7
63.44user 0.18system 1:04.61elapsed 98%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+7344outputs (0major+40818minor)pagefaults 0swaps
-rw-r--r-- 1 coolo suse 3753487 13. Mär 09:52 coreutils-6.10.tar.lzma.8
63.52user 0.32system 1:04.14elapsed 99%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+7328outputs (0major+76468minor)pagefaults 0swaps
-rw-r--r-- 1 coolo suse 3746901 13. Mär 09:53 coreutils-6.10.tar.lzma.9
As you can easily see, lzma -2 beats bzip2 -9 both at size and compression speed
(using slightly more memory). Above that it's no longer win-win as you win another
1MB if you go with -5 (as I read in a patch Mandriva is using) at the cost of
taking 5x the compression time bzip2 needs and twice as memory.
So it's important to remember why we're thinking about lzma to begin with:
uncompressing the bzip.9:
1.81user 0.00system 0:01.82elapsed 100%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+1068minor)pagefaults 0swaps
uncompressing the lzma.2:
0.80user 0.00system 0:00.83elapsed 97%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+824minor)pagefaults 0swaps
uncompression the lzma.5:
0.69user 0.01system 0:00.70elapsed 99%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+1080minor)pagefaults 0swaps
And decompressing is what our _users_ do. So what do rpm users want?
- Smaller downloads
- Faster installs of these downloads
- Reasonable memory usage
- (Not waiting one more day for a rebuild to be synced out)
So we're in a small dilemma, but we'll continue playing and something between 2
and 7 will be it.
BTW: remember that these are coreutils sources, the compression rates for binaries
won't be as impressive.
RadeonHD: Support for RV620/635 added!
A lot of people have been asking why there were so few commits
lately. People have been wondering if we were working on something
big.
Indeed we were:
Mode setting-wise RV620/635 ment the biggest change in subsystems
since R5xx: All outputs blocks have changed to allow for support
of Displayport.
The Displayport support is still missing as we are both lacking
hardware and programming information.
The digital outputs have been split up into an encoder and a
transmitter block which is now reflected in our programming model.
Furthermore the pixel clock PLL had been reworked completely.
We got hardware for testing as early as December 2007 however most
of the relevant documentation needed to code this has only been
received over the past four weeks.
Along with this support for dual link DVI has been added which is
still completely untested (due to lack of hardware).
So, even if you don't use any RV620/RV635 hardware, please get it
and give it a try! We are awaiting your feedback...
SOCKS proxy with SSH
Do you want to connect to irc network you realize that the ports are blocked. Using ssh -X you can forward programs on your computer but if you have a slow connection it doesn't work very well. It is possible to use -D option to create a SOCKS proxy:
-D [bind_address:]port
Specifies a local ``dynamic'' application-level port forwarding.
This works by allocating a socket to listen to port on the local
side, optionally bound to the specified bind_address. Whenever a
connection is made to this port, the connection is forwarded over
the secure channel, and the application protocol is then used to
determine where to connect to from the remote machine. Currently
the SOCKS4 and SOCKS5 protocols are supported, and ssh will act
as a SOCKS server. Only root can forward privileged ports. Dy-
namic port forwardings can also be specified in the configuration
file.
So the magic command is (you need a ssh account on remote server):
$ssh -D 10000 user@ssh-server
this will create a SOCKS proxy on port “10000″ of your computer. This is a nice tunnel to the server. Now, all you need to do is to set in xchat to use a SOCKS proxy. The proxy is, “localhost”, with the port 10000. That's all, the xchat works and you can spend a lot of time on irc.
Also you can use this kind of tunnel for safe browsing. You have to set your preferences in Firefox to use a SOCKS proxy. When you browse, all the connections you make to websites will seem to originate from the server to which you SSH-ed. In addition, all outgoing and incoming data for the browsing session will be encrypted since it passes through the SSH connection. I am using the SOCKS proxy when I need access to websites and I don't have access from home (for example if I need scientific papers), so I open a ssh-tunnel to university and then I can access them.
There are also applications (email clients) which may also support SOCKS proxy.
bash completion for zypper
Thanx to Marek for doing this!
Currently the script provides completion of commands and command options. This can be extended in the future to include package name completion for the install, remove and info commands, or even repository aliases for the repo handling commands and the --repo option.