- Start to listen on one node. The following command will pipe everything it gets into the file out.txt. It blocks until it read EOF. So we're listening on tcp port 9999.
sudo socat tcp-listen:9999 OPEN:out.txt,creat
- After you startet the receiver, you might read from a file and pipe into a socket to your receiver. Now we're sending to localhost (127.0.0.1) at port 9999, our unnamed0.graphml.
socat file:unnamed0.graphml tcp:127.0.0.1:9999
Ellks
Ellks blog about linux, development, it-security and random stuff.
Samstag, 12. Dezember 2015
Copying files with socat
Sonntag, 29. November 2015
Youtube - How do i buffer a complete video?
Most people know now, that youtube videos do not fully buffer anymore. You're buffering about ~15sec. In many cases, this isn't enough.
So, how do i buffer from now on?
Actually, you only need to change the URI. An other player opens, which is able to buffer your video. In general your URI looks like this:
You need to change the URI to:
For instance:
To:
Enjoy your videos in HD!
Cheers,
Ellks
So, how do i buffer from now on?
Actually, you only need to change the URI. An other player opens, which is able to buffer your video. In general your URI looks like this:
https://www.youtube.com/watch?v={ID}
You need to change the URI to:
https://www.youtube.com/v/{ID}?version=2
For instance:
https://www.youtube.com/watch?v=zeT_5VvGNlM
To:
https://www.youtube.com/v/zeT_5VvGNlM?version=2
Enjoy your videos in HD!
Cheers,
Ellks
Montag, 19. Oktober 2015
ArchLinux - Maude
- Download the latest version of maude:
http://maude.cs.illinois.edu/w/index.php?title=Maude_download_and_installation - Export the
*.zip
by typingunzip ~/Downloads/Maude*
- Go into the exported directory.
- Run the file
maude.linux64
Troubleshooting:
- Programm does not start and does not find
libtinfo.so.5
. Note we're referencing a lib which might has a similar name. Show yourself all similar libs withls /lib64 | grep libncurs
.cd /lib64
sudo ln -s libncursesw.so.6.0 libtinfo.so.5
Mittwoch, 7. Oktober 2015
From Java to C# - A few notes
- You might instantiate a generic class like a normal array:
List<T> mylist = new List<T>() { t1, t2, t3, ..., tn};
- LINQ - Language Integrated Query
- Queries for different DBs, XML, Generics
- Properties
- These are easy written accessors
- Futhermore an easy possiblity to convert information
- e.g. we store seconds in our time class
- you might write a property which allows you to simulate an other variable, like hours
which still relays on the seconds. public string Name
{
get { return ...; }
set { ... = value;}
}- Only functions noted with the keyword
virtual
might be overwritten. - Override is a keyword, not an annotation
- Javas
super
is C#sbase
- You must to append an
f
to yourfloat
float f = 3.141f
- There is a special keyword var
- var is a type which is determined at compile-time. So it can't change on run-time!
var v = (new List<int>() {1,2,3})[0];
- v has the type int now
- You might use
var
inforeach
foreach (Type t in Collection)
is javasfor (T t : Collection)
- All types are objects!
- There are two subtypes:
- Valuetypes
- Referencetypes
- There is not multiple inheritance.
- You implement interfaces and super classes in the same way:
class sub : super
{
// ...
}class implementation : interface
{
// ...
}- There a different types of lambdas:
Action<T1, ..., Tn>(...)
which maps on voidFunc<T1, ..., Tn, Tresult>(...)
which maps on given typeTresult
- Futhermore there are two keywords for easy threading:
await
async
Dienstag, 6. Oktober 2015
Edit Markdown with vim like a king!
When i did start writing Markdown files, it was for my projects on
After a short time, i figured out that chromium has a Markdown interpreter. It's called
After i installed the file, i was wondering if i couldn't bind chromium to a
So i added this line to my
autocmd BufEnter *.md exe 'noremap <F5> :! chromium %:p<CR>'
This line binds the key F5, on files ending with .md to chromium. So, when you press F5 chromium opens and the Markdown Preview Plus interprets the file.
github
. After editing on githubs
webpage, i was using vim
at local repositories.After a short time, i figured out that chromium has a Markdown interpreter. It's called
MarkDown Preview Plus
. I installed it because of the following features:- It can read local files.
- On the fly refresh - When you edit your markdown file and store it, the interpreter upgrades the view automatically.
After i installed the file, i was wondering if i couldn't bind chromium to a
vim
hotkey.So i added this line to my
.vimrc
:autocmd BufEnter *.md exe 'noremap <F5> :! chromium %:p<CR>'
This line binds the key F5, on files ending with .md to chromium. So, when you press F5 chromium opens and the Markdown Preview Plus interprets the file.
Dienstag, 15. September 2015
C# - Mono with MySql Connector under Linux
- I assume you already installed the mono runtime.
- Your logged in on your Linux machine.
- You did open a terminal.
- Download the .NET/mono assembly, provided by oracle.com.
http://lmgtfy.com/?q=c%23+mysql+connector - Unzip the files.
- Enter the
v2.0
folder. - Open a terminal.
I'm not sure what the different versions are. When you know it, fell free to leave a comment. - Now you add the "MySql.Data.dll" assembly to the runtime assemblies.
sudo gacutils -i MySql.Data.dll
That's it usually. Well, i had some permission trouble. You might go to the directory
/urs/lib/mono/gac/MySql.Data/
and look in the subfolder for your added assembly MySql.Data.dll
. Here you might type ls -l
to show your permission on the file. Type chmod +rx MySql.Data.dll
. With this you granted yourself and all other users of your computer the permission to read the file and execute it.
Make sure to add the references
System
and System.Data
to your project.Freitag, 28. August 2015
Running tasks in command background
When you're connected to a server via. ssh, you might have trouble running processes asynchronous. Following i wan't to show a few commands, which allow you to pause a process, move it to background, continue the process in back or foreground and let it even continue, when the shell closes.
All commands listed below:
When the process suspended and you wan't to continue it in foreground, on terminal, you might type
A process is running, e.g. cp. There might be a situation that you copy a large file and forgot to add & to the command. So you're running the process in foreground. To suspend the process and bring it to background you might press
For example:
All commands listed below:
jobs
- shows all current processes.bg
%jobid - continue job in background.fg
%jobid - bring background process into foreground.ctrl+z
- in terminal shown as^Z
; pauses current process and moves it to background.disown
%jobid - removes the process from table of active processes.
cp extremelargefile ../ &
.[1] + suspended (tty input) cp extremelargefile ../ &
.When the process suspended and you wan't to continue it in foreground, on terminal, you might type
fg %jobid
. To figure out the jobid you might type jobs. All current gets listed then.A process is running, e.g. cp. There might be a situation that you copy a large file and forgot to add & to the command. So you're running the process in foreground. To suspend the process and bring it to background you might press
ctrl+z
. When you wan't the process to ran further, type bg %jobid
. As already told, you can bring this process back to the front by typing fg %jobid
.For example:
> cp extremelargefile ../ ^Z zsh: suspended cp extermelargefile ../ > jobs [1] - suspended (tty output) cp extremelargefile ../ > bg %1 [1] - continued (tty output) cp extremelargefile ../ > fg %1 [1] + continued (tty output) cp extremelargefile ../
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