diff --git a/cli/commandupdate.cpp b/cli/commandupdate.cpp
index de7aa18..db2466b 100644
--- a/cli/commandupdate.cpp
+++ b/cli/commandupdate.cpp
@@ -1,8 +1,115 @@
+#include <QCommandLineParser>
+#include <QFileInfo>
+#include <QDateTime>
+#include <QThreadPool>
+#include <QtConcurrentRun>
 #include "commandupdate.h"
-
+#include "logger.h"
 
 
 int CommandUpdate::handle(QStringList arguments)
 {
+    QCommandLineParser parser;
+    parser.addOptions({
+                          { { "v", "verbose" }, "Print path of the files while updating them" },
+                          { { "n", "dry-run"}, "Only print which files would be updated, don't actually update them"},
+                          { "pattern", "Only consider to update files in the index matching the pattern, e. g. */.git/*.", "pattern" },
+                          { { "d", "delete" }, "If a file does not exist anymore, delete it" },
+                          { { "c", "continue" }, "Continue adding files, don't exit on first error"},
+                          { { "a", "all" }, "On error, no files should be updated, even already processed ones" },
+                          { { "t", "threads" }, "Number of threads to use.", "threads" }
+
+                      });
+
+    parser.addHelpOption();
+    parser.addPositionalArgument("update", "Checks files for changes and updates them", "update");
+
+    parser.process(arguments);
+    bool keepGoing = parser.isSet("continue");
+    bool verbose = parser.isSet("verbose");
+    bool deleteMissing = parser.isSet("delete");
+    bool dryRun = parser.isSet("dry-run");
+    QString pattern = parser.value("pattern");
+
+    if(parser.isSet("all"))
+    {
+        throw QSSGeneralException("To be implemented");
+    }
+    if(parser.isSet("threads"))
+    {
+        QString threadsCount = parser.value("threads");
+        QThreadPool::globalInstance()->setMaxThreadCount(threadsCount.toInt());
+    }
+    FileSaver saver(*this->dbService);
+    QVector<FileData> files;
+    int offset = 0;
+    int limit = 1000;
+    int processedRows = dbService->getFiles(files, pattern, offset, limit);
+
+    while(processedRows > 0)
+    {
+        QVector<QString> filePathsToUpdate;
+        for(FileData &fileData : files)
+        {
+            QFileInfo fileInfo(fileData.absPath);
+            if(fileInfo.exists() && fileInfo.isFile())
+            {
+                if(fileInfo.lastModified().toSecsSinceEpoch() != fileData.mtime)
+                {
+                    if(!dryRun)
+                    {
+                        filePathsToUpdate.append(fileData.absPath);
+                    }
+                    else
+                    {
+                        Logger::info() << "Would update" << fileData.absPath << endl;
+                    }
+                }
+
+            }
+            else
+            {
+                if(deleteMissing)
+                {
+                    if(!dryRun)
+                    {
+                        if(!this->dbService->deleteFile(fileData.absPath))
+                        {
+                            Logger::error() << "Error: Failed to delete" << fileData.absPath << "from databas" << endl;
+                            if(!keepGoing)
+                            {
+                                return 1;
+                            }
+                        }
+                        if(verbose)
+                        {
+                            Logger::info() << "Deleted" << fileData.absPath << endl;
+                        }
+                    }
+                    else
+                    {
+
+                        Logger::info() << "Would delete" << fileData.absPath << endl;
+                    }
+
+                }
+            }
+        }
+
+
+        if(!saver.updateFiles(filePathsToUpdate, keepGoing, verbose))
+        {
+            if(!keepGoing)
+            {
+                Logger::error() << "Failed to update all files selected for updating" << endl;
+                return 1;
+            }
+        }
+        offset += limit;
+        processedRows = this->dbService->getFiles(files, pattern, offset, limit);
+    }
+
+    return 0;
+
 
 }
diff --git a/cli/commandupdate.h b/cli/commandupdate.h
index bfd09e6..a819924 100644
--- a/cli/commandupdate.h
+++ b/cli/commandupdate.h
@@ -1,13 +1,11 @@
 #ifndef COMMANDUPDATE_H
 #define COMMANDUPDATE_H
 #include "command.h"
-
+#include "filesaver.h"
 class CommandUpdate : public Command
 {
 public:
-    CommandUpdate();
-
-
+    using Command::Command;
     int handle(QStringList arguments) override;
 };