Split a big text file into many files

Hi!

Suppose that we have a big text file with 2 000 000 lines and you want to split it in 1 000 files containing 20 000 lines each.

You only have one command to type!

split -l 20000 myfile.txt

You will get 1 000 files.

If you are on Windows, you just have to install Cygwin Terminal

Interesting site for calories / nutrition facts

Here's the site:

http://www.myfitnesspal.com/food/calorie-chart-nutrition-facts

Batch - Deleting all the files and directories under a root directory

Hi!

With Windows 7, I need to delete all the files and subdirectory under a root directory.

I was able to achieve this task with theses two commands in a batch script

rmdir /S /Q MY_DIRECTORY

md MY_DIRECTORY

The first one deletes all the files and directory under MY_DIRECTORY but it deletes also the root directory. I recreate after the root directory.

It may not be the best way to achieve this but it works.

java.lang.NoSuchMethodError: antlr.collections.AST.getLine()

After adding Velocity to my Spring Web Application, I'm getting this error:


29.09.2013 22:44:26  WARN (AbstractMessageListenerContainer.java:696) - Execution of JMS message listener failed, and no ErrorHandler has been set.
java.lang.NoSuchMethodError: antlr.collections.AST.getLine()I

...

The error is due by the conflicts between two differents version of "antlr". You need to exclude the version from velocity-tool.

So add the following exclusion to the velocity-tools maven dependency.


  <dependency>
            <groupId>org.apache.velocity</groupId>
            <artifactId>velocity-tools</artifactId>
            <version>2.0</version>
            <exclusions>
                <exclusion>
                    <artifactId>antlr</artifactId>
                    <groupId>antlr</groupId>
                </exclusion>
            </exclusions>
   </dependency>

Tar following symlinks

Hi!

Suppose that we have to tar gzip a directory that contains two symlinks.

ROOT_DIRECTORY
     SYMLINK_A
     SYMLINK_B



SYMLINK_A
     FILE_A
     FILE_B

SYMLINK_B
     FILE_C
     FILE_D



If you use the usual command tar -zcvf ROOT_DIRECTORY.tgz ROOT_DIRECTORY

You will get an archive that contains two symbolic links.

ROOT_DIRECTORY
     SYMLINK_A
     SYMLINK_B



If you want to include the content of symbolic links, you need to add a "h" just after the "c",

The command is tar -zchvf ROOT_DIRECTORY.tgz ROOT_DIRECTORY

You will get the directory including all the files under the ROOT_DIRECTORY

ROOT_DIRECTORY
     SYMLINK_A
          FILE_A
          FILE_B

     SYMLINK_B
          FILE_C
          FILE_D

Nice Grep tool for Windows - grepWin

Hi!

I've found a great tool to do greps in Windows.




Please have a look at https://code.google.com/p/grepwin/

Ruby Application Server - Installation notes for Nginx and Passenger

Hi!

Here's how to install Passenger and Nginx. You will get a very fast Ruby application server.

Compile nginx :

tar -xzvf nginx-1.3.14.tar.gz

cd nginx-1.3.14

./configure --prefix=/etc/nginx --with-http_ssl_module

cd /etc/init.d/

ln -snf /etc/nginx/sbin/nginx

Compile passenger :

cd /usr/local/ruby/bin

./passenger-install-nginx-module

 1. Yes: download, compile and install Nginx for me. (recommended)

    The easiest way to get started. A stock Nginx 1.0.6 with Passenger

    support, but with no other additional third party modules, will be

    installed for you to a directory of your choice.

 2. No: I want to customize my Nginx installation. (for advanced users)

    Choose this if you want to compile Nginx with more third party modules

    besides Passenger, or if you need to pass additional options to Nginx's

    'configure' script. This installer will  1) ask you for the location of

    the Nginx source code,  2) run the 'configure' script according to your

    instructions, and  3) run 'make install'.

Whichever you choose, if you already have an existing Nginx configuration file,

then it will be preserved.

Enter your choice (1 or 2) or press Ctrl-C to abort: 2

The next step is to point passenger to the source directory. Is this example, the source is in my home folder so it’s -> /home/xxx/nginx-1.3.14.

Than point the installation of nginx to /etc/nginx

Passenger is now installed. Here’s what your nginx config should look like this:

____________________________________________

worker_processes  2;

error_log  logs/error.log  debug;

#pid        logs/nginx.pid;

events {

    worker_connections  2000;

}

http {

    passenger_root /usr/local/ruby-1.8.7-p352/lib/ruby/gems/1.8/gems/passenger-3.0.9;

    passenger_ruby /usr/local/ruby-1.8.7-p352/bin/ruby;

    passenger_max_pool_size 3;

    include       mime.types;

    default_type  application/octet-stream;

    sendfile        on;

    #tcp_nopush     on;

    keepalive_timeout  65;

  server {

     listen 8666;

     server_name localhost;

    

     root /data/opt/local/ruby/myapp/public/;   # <--- be sure to point to 'public'!

     passenger_enabled on;

     passenger_use_global_queue on;

     auth_basic "myapp Access"; # <--- For password auth

     auth_basic_user_file /home/myapp/passwd;

    

   }

     #error_page  404              /404.html;

        # redirect server error pages to the static page /50x.html

        #

}

______________________________________________________

Start:

/etc/init.d/nginx

Stop :

/etc/init.d/nginx -s stop