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6. For security reasons, PostgreSQL won t allow root to start the server. Execute the following command to change the owner of all the files to postgres: chown -R postgres:postgres /usr/local/pgsql 7. Log in as postgres, or use the su command, and then change the directory to /usr/local/pgsql: cd /usr/local/pgsql 8. Initialize a database cluster with this command: bin/initdb -D ./data 9. Start PostgreSQL with this command: bin/pg_ctl -D ./data -l data/logfile start 10. Now that PostgreSQL is started, you need to create a database and another user before going any further. You should use a separate database for each of the projects to make things a little cleaner and easier to understand. You should also use separate users for each database. This keeps everything separate and project a won't be able to modify any of project b s data. To create a new user in PostgreSQL, it s pretty simple. Just use the following command and then follow the prompts: /usr/local/pgsql/bin/createuser The new user should not be able to create new databases or create new users. To create a database, it's a little different: /usr/local/pgsql/bin/createdb --owner=username databasename

String[] labels = PdfPageLabels.getPageLabels(new PdfReader(src));

Now suppose you want to change the prefix Movies- shown in figure 13.6 to Film-, and you want to restart the page count, changing Movies-4 into Film-1. You can do this using the same technique you ve used to crop and rotate pages.

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Figure 2-5. The empty pivot table and the PivotTable Field List pane At the top of the PivotTable Field List pane is a list of the column headings from your Excel table; they appear in the same order as in the Excel table. In the pivot table, these are called fields. At the bottom of the PivotTable Field List pane are the four areas of the pivot table: Report Filter, Column Labels, Row Labels, and Values. You will drop the fields into these areas, and they ll appear in the matching area of the pivot table layout on the worksheet (see Figure 2-6).

pgAdmin III doesn t ship with the Linux version of PostgreSQL, as it does with the Windows version. Keeping in mind to replace the file names with the actual ones in case you use newer versions, here are the steps you should follow to install pgAdmin III on your Linux machine. 1. Download the source code for the pgAdmin III dependency wxWidgets from http://wxwidgets.org/downloads/#latest_stable (currently the version for pgAdmin III v1.4.3 is wxWidgets 2.6.3). 2. Unpack, build, and install the source code: tar zvxf wxWidgets* cd wxWidgets* ./configure --with-gtk --enable-gtk2 --enable-unicode --enable-mimetype=no make make install

PdfReader reader = new PdfReader(src); PdfDictionary root = reader.getCatalog(); PdfDictionary labels = root.getAsDict(PdfName.PAGELABELS); PdfArray nums = labels.getAsArray(PdfName.NUMS); int n; Loops over page PdfDictionary pagelabel; label definitions for (int i = 0; i < nums.size(); i++) { n = nums.getAsNumber(i).intValue(); i++; if (n == 5) { Removes start value pagelabel = nums.getAsDict(i); for page number pagelabel.remove(PdfName.ST); pagelabel.put(PdfName.P, new PdfString("Film-")); Replaces } prefix } PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(dest)); stamper.close();

Here you don t have a method, such as getPageN(), that takes you straight to the dictionary you need. Instead, you climb up the object tree, jumping from object to object starting from the root.

# Install wxWidgets contrib modules. cd contrib/ make make install 3. Download the latest version of pgAdmin III source code from http:// www.postgresql.org/ftp/pgadmin3/release. 4. Unpack, build, and install the source code: tar -zvxf pgadmin3-1.4.3.tar.gz cd pgadmin3-1.4.3 ./configure make all make install

PdfDictionary has a get() method that returns the PdfObject that corresponds with a specific PdfName. This can be a PdfIndirectReference, in which case you have to look up the corresponding indirect object; or it can be a direct object in the form of a PdfObject that needs to be cast to the proper type. If you know in advance which type of object you ll get, you can use one of the convenience methods listed in table 13.10 (as was done in listing 13.12).

Figure 2-6. The Report Filter, Column Labels, Row Labels, and Values areas in the pivot table layout

Method Return value A PdfBoolean or null A PdfNumber or null A PdfString or null A PdfName or null A PdfArray or null A PdfDictionary or null A PdfStream or null Table 13.10 Convenience methods for getting specific objects

Every time you want to get a new PHP library working on Linux, you need to recompile the PHP module. That s why it s recommended to make a good compilation, with all the needed libraries, from the start. Go to http://www.php.net/downloads.php, get the complete source code archive of PHP 5.x, and extract the contents in a directory. Before compiling PHP and making Apache aware of it (by updating Apache s configuration file httpd.conf), you need to install the extra modules you ll need to work under PHP . Let s deal with them one by one.

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