diff --git a/src/fr/devinsy/logar/app/Logar.java b/src/fr/devinsy/logar/app/Logar.java
index 8539e81..8d2d6de 100644
--- a/src/fr/devinsy/logar/app/Logar.java
+++ b/src/fr/devinsy/logar/app/Logar.java
@@ -397,7 +397,7 @@ public final class Logar
         {
             System.out.println("Undefined source.");
         }
-        else if (source.exists())
+        else if (!source.exists())
         {
             System.out.println("Missing source to check.");
         }
@@ -425,7 +425,7 @@ public final class Logar
         {
             System.out.println("Undefined source.");
         }
-        else if (source.exists())
+        else if (!source.exists())
         {
             System.out.println("Missing source to check.");
         }
@@ -495,6 +495,89 @@ public final class Logar
         }
     }
 
+    /**
+     * Extract user agent.
+     *
+     * @param source
+     *            the source
+     * @throws IOException
+     *             Signals that an I/O exception has occurred.
+     */
+    public static void extract(final File source, final ExtractOption option) throws IOException
+    {
+        if (source == null)
+        {
+            System.out.println("Undefined source.");
+        }
+        else if (option == null)
+        {
+            System.out.println("Undefined option.");
+        }
+        else if (!source.exists())
+        {
+            System.out.println("Missing source to sort.");
+        }
+        else
+        {
+            Files files = FilesUtils.search(source, LOGFILE_PATTERN).removeHidden().keep(".*access.*").sortByName();
+            System.out.println(files.size());
+            for (File file : files)
+            {
+                // System.out.println("== Extract userAgent for [" +
+                // file.getName() + "]");
+                try
+                {
+                    LineIterator iterator = new LineIterator(file);
+                    while (iterator.hasNext())
+                    {
+                        String line = iterator.next();
+
+                        try
+                        {
+                            Log log = LogParser.parseAccessLog(line);
+                            String extract;
+                            switch (option)
+                            {
+                                case IP:
+                                    extract = log.getIp();
+                                break;
+
+                                case DATETIME:
+                                    extract = log.getDatetimeValue();
+                                break;
+
+                                case USERAGENT:
+                                    extract = log.getUserAgent();
+                                break;
+
+                                default:
+                                    extract = null;
+                            }
+
+                            System.out.println(log.getUserAgent());
+                        }
+                        catch (IllegalArgumentException exception)
+                        {
+                            System.out.println("Bad format line: " + line);
+                            exception.printStackTrace();
+                        }
+                        catch (DateTimeParseException exception)
+                        {
+                            System.out.println("Bad datetime format: " + line);
+                        }
+                    }
+                }
+                catch (IOException exception)
+                {
+                    System.err.println("Error with file [" + file.getAbsolutePath() + "]");
+                    exception.printStackTrace();
+                }
+
+                LogFile.sortLogFile(file);
+            }
+        }
+    }
+
     /**
      * Sort.
      *
@@ -509,7 +592,7 @@ public final class Logar
         {
             System.out.println("Undefined source.");
         }
-        else if (source.exists())
+        else if (!source.exists())
         {
             System.out.println("Missing source to sort.");
         }
diff --git a/src/org/april/logar/cli/LogarCLI.java b/src/org/april/logar/cli/LogarCLI.java
index c9bc923..0a2e26b 100644
--- a/src/org/april/logar/cli/LogarCLI.java
+++ b/src/org/april/logar/cli/LogarCLI.java
@@ -26,6 +26,7 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import fr.devinsy.logar.app.DryOption;
+import fr.devinsy.logar.app.ExtractOption;
 import fr.devinsy.logar.app.Logar;
 import fr.devinsy.strings.StringList;
 
@@ -223,6 +224,13 @@ public final class LogarCLI
 
                 Logar.checkSort(source);
             }
+            else if (isMatching(args, "extract", "\\s*(ip|datetime|useragent)\\s*", "\\s*\\S+\\s*"))
+            {
+                ExtractOption token = ExtractOption.of(args[1]);
+                File source = new File(args[2]);
+
+                Logar.extract(source, token);
+            }
             else if (isMatching(args, "sort", "\\s*\\S+\\s*"))
             {
                 File source = new File(args[1]);