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Windows 10 - Améliorer la vitesse

Analyser les performances

Ouvre le gestionnaire des tâches: CTRL + MAJ + ECHAP

performances: vérifiez visuellement quel composant sature: CPU, Disque, Mémoire
Détails: lister processus en cours d'exécution: tri possible sur CPU ou Mémoire en décroissant
Historique des applications : tri sur temps processeur en décroissant
Démarrage : vérifier ldes services au démarrage. Désactiver en cas de doute

Disque dur

Analyse / Defrag: "Optimiser les lecteurs"
Cleanup: "Nettoyage de disque"
Régler l’apparence et les performances de Windows
- cocher Ajuster afin d’obtenir les meilleures performances

Applications imposées

Lister

Ouvrir PowerShell (en tant qu'administrateur)

 Get-AppxPackage | Format-List -Property Name

Exemple pour rechercher Facebook ou Mirosoft

 Get-AppxPackage -Name fa* | Format-List -Property Name
 Get-AppxPackage -Name Microsoft* | Format-List -Property Name

Désinstallation

Ouvrir PowerShell (en tant qu'administrateur)

 Get-AppxPackage *windowscommunicationsapps* | Remove-AppxPackage
 Get-AppxPackage *xboxapp* | Remove-AppxPackage
 Get-AppxPackage *officehub* | Remove-AppxPackage
 Get-AppxPackage *solitairecollection* | Remove-AppxPackage
 Get-AppxPackage *bingfinance* | Remove-AppxPackage
 Get-AppxPackage *bingnews* | Remove-AppxPackage
 Get-AppxPackage *bingsports* | Remove-AppxPackage
 Get-AppxPackage *bingweather* | Remove-AppxPackage
 Get-AppxPackage *Microsoft.Office.OneNote* | Remove-AppxPackage
 Get-AppxPackage *Facebook.Facebook* | Remove-AppxPackage
 Get-AppxPackage *Microsoft.WindowsMaps* | Remove-AppxPackage
 Get-AppxPackage *Microsoft.WindowsCamera* | Remove-AppxPackage
 Get-AppxPackage *Microsoft.People* | Remove-AppxPackage
 Get-AppxPackage *Microsoft.Windows.Photos* | Remove-AppxPackage
 Get-AppxPackage *Microsoft.BingTravel* | Remove-AppxPackage
 Get-AppxPackage *Microsoft.BingFoodAndDrink* | Remove-AppxPackage
 Get-AppxPackage *Microsoft.FreshPaint* | Remove-AppxPackage

Réinstaller une application

Si par erreur vous avez supprimé une application utile, reprenez son nom dans la ligne suivante (ex. pour la première^):

Get-AppxPackage -AllUsers  -Name *windowscommunicationsapps* | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml"}

Sources utilisées

GPG: minimal how to

GPG minimal how-to !

GPG is a free and easy way to encrypt and/or verify your exchanges.
This HowTo was done with "gpg (GnuPG) 1.4.22" a GNU GPLv3 tool.

This post includes GPG basic commands:
- generate your key
- send/receive encrypted content
- sign or verify a content
- export/import your secret key

on windows host, you could install and use git bash to follow this steps

Initialize GPG tool using 'list keys' ?

$ gpg --list-keys
gpg: répertoire « /home/osboxes/.gnupg » créé
gpg: nouveau fichier de configuration « /home/osboxes/.gnupg/dirmngr.conf » créé
gpg: nouveau fichier de configuration « /home/osboxes/.gnupg/gpg.conf » créé
gpg: le trousseau local « /home/osboxes/.gnupg/pubring.kbx » a été créé
gpg: /home/osboxes/.gnupg/trustdb.gpg : base de confiance créée

First time a gpg command is executed, gpg produces base gpg init: a ~/.gnupg directory

How to generate my key ?

$ gpg --gen-key

Keep default options, and answer question about real name, and email, and passphrase.

That's all.

Now you can list your key:










$ gpg --list-secret-keys

You could distribute your public key:

$ gpg --keyserver hkp://keyserver.ubuntu.com:80 --send-keys KEYIDHERE

How to send encrypted content ?

Search (or ask) your recipient KEYID using the following command:

$ gpg --keyserver hkp://keyserver.ubuntu.com:80 --search-keys robert

Receive the key (require KEYID)

$ gpg --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys KEYIDHERE

Encrypt file using a given recipient (require related key)

$ gpg -r jojo@yoyo.fr -o encrypted.gpg -e clear_content.txt

this command will encrypt "clear_content.txt" into "encrypted.gpg" using "jojo@yoyo.fr" key.
you could add multiple recipient by repeating -r option
you coul ascii encode by using -a option

Use your favorite email client to send encrypted file.

How to receive encrypted content from somebody

You will need the following requirements:

generate and distribute your own key (step above)
communicate about the way to encrypt content (step above) to you recepient

Use your favorite email client to receive encrypted file.
Decrypt received file using the following command:

$ gpg -o decrypted.txt -d encrypted.gpg

How to add detached signature?

You would like to prove that YOU send clear information (this command doesn't encrypt the message itself)

$ gpg -o doc.sig --clearsign doc

You will need to answer you passphrase.
This will add a clear signature from doc and generate doc.sig as result

How to verify message with detached signature?

You would like to prove clear information associated signature identity (this command doesn't decrypt the message itself)

Assume you message with detached signature is in a file called "doc.sig"

$ gpg -o doc -d doc.sig

How to backup your secret key?

export it (in a very very secure place)

$ gpg --list-secret-keys

$ gpg --export-secret-keys -a MYKEYID > username_gpg_export_secret.asc

import it

$ gpg --import -a username_gpg_export_secret.asc

"-a" means ascii export/import. You could omit this option to export/import binary.

HowTo: Swig C to Java: functions that manage an array of int, simple or complex struct (eg. array of objects)

You would like to map a C code from your Java application and you have heard about Swig: this post is for you!

This post is a really simple example to understand how to manage (from Java application) a C array of complex structure.

After reading Swig 3 documentation and searching on the net, I've finally succeed to create a little poc on how to return a list of struct.

proof of concept sample includes 4 functions:

a function sumitems that accept an array of integer as parameter to calculate a sum (part of Swig3 documentation)
a function populateSampleItem that just write on a given simple structure
a function populateItems that update an existing array of struct
a function buildItems that create from scratch a result array of struct

source of this poc is available here : https://github.com/boly38/pocswig
this poc is widely inspirated from similar example from "Samuel Jacob's Weblog" post (thanks to him !)

First file to write is the C header poc.h:

/* (in) simple int array as parameter */
int sumitems(int *first, int nitems);

/* simple structure */
typedef struct MyItem_t {
      int  id;
      char *name;
} MyItem;

/* (in/out) simple struct as parameter (updated by the function) */
void populateSampleItem(MyItem *item);

/* array of structure */
typedef struct MyItems_t {
      int  count;       // elements count
      MyItem *elements; // array of MyItem
} MyItems;

/* (in/out) array of structure as parameter (updated by the function) */
void populateItems(MyItems *items);

/* (out) array of structure (generated by the function) */
MyItems *buildItems();

The you will then have to write the C implementation. Here is a sample poc.c:

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "poc.h"

int sumitems(int *first, int nitems) {
  int i, sum = 0;
  for (i = 0; i < nitems; i++) {
    sum += first[i];
  }
  return sum;
}

void populateSampleItem(MyItem *item) {
  item->id = 1234;
  item->name = strdup("getSampleItem");
}

void populateItems(MyItems *items) {
    int nb = items->count;
    items->elements = malloc(nb * sizeof(MyItem));
    for (int j=nb-1;j>=0;j--) {
        items->elements[j].id = j;
        char elementName[80];
        sprintf(elementName, "populateItems %d", j);
        items->elements[j].name = strdup(elementName);
    }
}

MyItems *buildItems() {
    printf("buildItems 14 elements");
    int nb = 14;
    MyItems *items= malloc(sizeof(MyItems));;
    items->count = nb;
    items->elements = malloc(nb * sizeof(MyItem));
    for (int j=nb-1;j>=0;j--) {
        items->elements[j].id = j;
        char elementName[80];
        sprintf(elementName, "buildItems %d", j);
        items->elements[j].name = strdup(elementName);
    }
    return items;
}

And now to access this function from java, you will have to use Swig.

Swig use a specification file to setup how to map function/types/etc... This file is a .i file. Here is the file poc.i:

%module swigpoc

%include "arrays_java.i";
%apply int[] {int *};

%{
 #include "poc.h"
%}

%include "poc.h";
%extend MyItems_t{
  MyItem * getElement(int i) {
      return &$self->elements[i];
  }
}

Line 1 define the module name,
Line 3&4 define how to handle int array using swig facility,
Line 6 to 8 to tell to Swig to output include line into the target wrapper file.
Line 10 reuse as is the header file as specification (Swig MUST wrap all header file methods and structs to Java).
Line 11 to 15 to tell to Swig to append an extra function to help Java user to access to array element.

Now you will have to generate Java files! Use Swig :

rm -f *Item.java *.o *.dll swigpoc*
swig -java poc.i

You could look at your directory, there is some new C and Java files: poc_wrap.c, MyItem.java, MyItems.java, swigpoc.java swigpocJNI.java Next step is to build up the DLL (shared library) (exemple under Cygwin):

#!/bin/bash
JAVA_HOME=/cygdrive/c//Programmes/Java/jdk1.8.0_112/
INCLUDES="-I$JAVA_HOME/include/ -I$JAVA_HOME/include/win32/"

x86_64-w64-mingw32-gcc.exe -c poc.c poc_wrap.c $INCLUDES
x86_64-w64-mingw32-gcc.exe $INCLUDES -shared -o poc.dll poc_wrap.o poc.o

Now you can play with your new library from Java; exemple PocExample.java:

public class PocExample {

  static {
    System.out.println("load poc ...");
    System.loadLibrary("poc");
    System.out.println("load poc ... OK ");
  }

  public static void  main(String args[]) {
    System.out.println("poc");

    System.out.println("sumitems:");
    int[] arrayB = new int[10000000];          // Array of 10-million integers
    for (int i=0; i<arrayB.length; i++) {      // Set some values
      arrayB[i] = i;
    }
    int sum = swigpoc.sumitems(arrayB, 10000);
    System.out.println("SumB = " + sum);


    System.out.println("MyItem:");
    MyItem myt = new MyItem();
    swigpoc.populateSampleItem(myt);
    System.out.println("myt.name = " + myt.getName());

    MyItems myts = new MyItems();
    myts.setCount(10);
    swigpoc.populateItems(myts);

    for (int j=0; j<myts.getCount(); j++) {
      System.out.println(String.format("myts.element[%d].name = '%s'",j, myts.getElement(j).getName()));
      System.out.println(String.format("myts.element[%d].id = '%s'"  ,j, myts.getElement(j).getId()));
    }


    MyItems rez = swigpoc.buildItems();
    for (int k=0; k<rez.getCount(); k++) {
      System.out.println(String.format("rez.element[%d].name = '%s'",k, rez.getElement(k).getName()));
      System.out.println(String.format("rez.element[%d].id = '%s'"  ,k, rez.getElement(k).getId()));
    }
  }
}

I let you execute that:

1
2
3

#!/bin/bash
JAVA_HOME=/cygdrive/c//Programmes/Java/jdk1.8.0_112/
$JAVA_HOME/bin/javac *.java && $JAVA_HOME/bin/java PocExample

If you see something wrong, please tell me. Else hopes this helps!

How to Jenkins : chain jobs with parameters

This post describes How To chain jobs with parameter(s).
- Choose optionA if you're using pipeline plugin.
- OptionB is a little bit deprecated, but usefull if you would like to script your build execution or trigger it remotely.

(option A) Define a post action in first job

First recommended and simple way if your are using "Build Pipeline". Go to the first job configuration to append a post-action :

(option B) Chain it using shell scripts

NB: this option will make loosing your pipeline chain.
I recommend to use 2 small dedicated temp jobs to test it first. That would avoid to run unnecessarely long build...

Steps :

Install Build Token Root Plugin
Define first job with parameter
Define second job ("follower") with parameter
Define a trigger for the follower
Append a shell script to chain the two jobs
Try!

Install Build Token Root Plugin

Ask to your Jenkins administrator to install this plugin : Build Token Root Plugin
Wait that Jenkins reboot (required).

Define first job with parameter

Add "branch" parameter to your first job.

Add a shell script to echo the variable.

Define follower job with parameter

Add "branch" parameter to your second job (same as previously).
Add a shell script to echo the variable(same as previously).

Define a trigger for the follower

Add a trigger for the second job. Set a secret token here.

Append a shell script to chain the two jobs

Open the first job configuration to add the following shell script.
You will need to adapt the jenkins host value corresponding to your environment.

# show job parameter
echo branch=${branch}

#  resources
#  https://wiki.jenkins-ci.org/display/JENKINS/Parameterized+Build
#  https://wiki.jenkins-ci.org/display/JENKINS/Build+Token+Root+Plugin
#  http://curiositedevie.blogspot.nl/2016/02/how-to-jenkins-chain-jobs-with.html
export JENKINS_HOST=https://myjenkins.domain.net
export JOB_TOKEN=THISISWONDERFULL
export JOB_NAME=git_config_follower
export JOB_PARAM1=branch=${branch}
export JOB_CAUSE=Launching_follower_with_branch_set_to_${branch}
export JOB_PING="$JENKINS_HOST/buildByToken/buildWithParameters?job=$JOB_NAME&token=$JOB_TOKEN&$JOB_PARAM1&cause=$JOB_CAUSE"
echo $JOB_PING
curl --verbose --insecure $JOB_PING

Try!

Launch the first job with a parameter.

Go to the Job console to check curl http status.

Go to the follower (second) job logs.

Check the follower result!

Microsoft Windows: minimal howto

This post is a kind of minimal 'how to' for Micro$oft Windows.

Windows : basic command (to execute from [WINDOWS + R])

cmd             : classic console
powershell      : power shell command console
msinfo32        : host info
devmgmt.msc     : devices management (fr: Gestionnaire de périphériques)
certmgr.msc     : certificates managers
services.msc    : windows OS services
javaws -viewer  : windows java services
eventvwr.exe    : Event viewer
shell:Startup   : show startup programs (if any)
procmon.exe     : (download) show process actiity (really useful)
compmgmt.msc    : Computer Management

NB: for ssl cf ssl howto

god mode (Windows 10)

create a folder on windows 10 desktop and name it

GodMode.{ED7BA470-8E54-465E-825C-99712043E01C}

network related commands

list all LISTENING ports

netstat -ano

netstat -ano | find "LIST"

find an application from port^src

netstat -ano | find "LIST"
==> Pick the wanted process id from the last column. Example pid "8112"
tasklist  | find "8112"
tasklist /svc | find "8112"

DNS lookup

nslookup www.google.fr

nslookup
server 8.8.8.8
www.google.fr

other usefull common tools

FileZilla (secure FTP)
Notepad++ (light editor)
Cygwin (unix like shell)
Process Hacker 2 (improved task list manager)

ssl certificates and truststore: minimal howto

This post is a kind of minimal 'how to' for SSL, certificates and truststore :

Tomcat HTTPS application : how to use a valid and trusted self-signed certificate for localhost
SSL Client : "PKIX path building failed" error

Tomcat HTTPS application : how to use a valid and trusted self-signed certificate for localhost

Context

As WebDevelopper, I use Tomcat and I need to work with localhost with a secure web application. The issue with the latest browser update (ex. ggchrome) is that an invalid or untrusted self signed certificate could block the navigation or AJAX exchanges.
For example, you could get the folloowing error :

NET::ERR_CERT_AUTHORITY_INVALID
:: certificate validation chain is not trusted
ERR_INSECURE_RESPONSE
:: unable to trust a server answer

to workaround this issue, you could follow these steps:

generate a self-signed certificate for localhost
tell to tomcat to use this certificate
append this certificate to your workstation certificates manager

Generate a self signed certificate

$ keytool -genkey -keyalg RSA -alias tomcat \
  -keystore $HOME/.keystore -storepass changeit -validity 360 -keysize 2048

Warning: answer "localhost" to the first question

more documentation: tomcat8 ssl howto - sslshopper create self signed cert

Tomcat ssl configuration

Connector's attributes example from server.xml:

SSLEnabled="true" clientAuth="false" 
 keystoreFile="${user.home}/.keystore" keystorePass="changeit" 
 maxThreads="150" port="8443" 
 protocol="org.apache.coyote.http11.Http11NioProtocol" 
 scheme="https" secure="true" sslProtocol="TLS"

Append this certificate to your workstation certificates manager

navigate to your tomcat application ; example : https://localhost:8443
(example using google chrome), right click on address bar lock / click on "certificate informations (...)" link / "details" tab
Choose "copy certificate into file" - keep default format X509 DER.
right click on the just created file to "Install certificate"
Select the following target : "Trusted root certification authorities"("Autorités de certification racines de confiance")
You could verify the certificate installation : Windows Start / Execute / certmgr.msc ; this will open Windows certificates manager
Restart your browser (use CTRL + ALT + Q for Google Chrome instead of closing the window).
navigate to your tomcat application ; example : https://localhost:8443 : your certificate should be trusted now

SSL Client : "PKIX path building failed" error

Java error

javax.net.ssl.SSLHandshakeException: 
sun.security.validator.ValidatorException: PKIX path building failed: 
sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

Java workarounds

(bad and quick way) Disable all ssl check by configuration cf. UnsafeSSLHelper (from javabox github project)
(right way) Update the ssl verification chain. For example by importing new valid certificate(s) to your truststore.

Windows

Windows / List certificates:

Start / Execute / certmgr.msc

Google Chrome / List certificates:

go to Parameters, the search "ssl" (chrome://settings/search#ssl)

Import a certificate in a truststore file:

Make a backup :

cp %JAVA_HOME%/jre/lib/security/cacerts %JAVA_HOME%/jre/lib/security/cacerts.orig

Import a certificate :

keytool -import -alias MyCert -keystore %JAVA_HOME%/jre/lib/security/cacerts \
     -trustcacerts -file MyCert.cer

(cf. commandes+keytool ...)

Implort a certificate in JDK truststore:
create a little batch like this one :

set JAVA_HOME=C:\Program Files\Java\jdk1.8.0_65
set PATH=%JAVA_HOME%\bin;%PATH%
REM set JRE_CACERTS=%JAVA_HOME%\lib\security\cacerts
set JDK_CACERTS=%JAVA_HOME%\jre\lib\security\cacerts
set PASSWORD=changeit
set DIR=certsdir

for %%f in (%DIR%\*.cer) do keytool -keystore "%JRE_CACERTS%" -storepass %PASSWORD% -noprompt -importcert -alias "%%~nf" -file %%f
for %%f in (%DIR%\*.cer) do keytool -keystore "%JDK_CACERTS%" -storepass %PASSWORD% -noprompt -importcert -alias "%%~nf" -file %%f

This script install all certificates under certsdir to the JDK (or JRE).

shared libraries "lib.so and lib.dll" file: minimal how to

This post is a kind of minimal 'how to' for the shared libraries : ex. under linux mylib.so or under windows my.dll

Windows

List library exported symbols (then functions):
- Tool : Dll Export Viewer (nirsoft.net)
- (visualstudio required) dumpbin /exports my.dll [not tested]

Linux

List library exported symbols (then functions)

readelf -s /usr/lib/libspreadsheet.so |grep workbook_sheet

nm -D /usr/lib/libspreadsheet.so |grep workbook_sheet

objdump -T /usr/lib/libspreadsheet.so |grep workbook_sheet

List library dependencies

readelf -d /usr/lib/libspreadsheet.so|grep NEEDED

prosyst OSGi: minimal how to

This post is a kind of minimal 'how to' for Prosyst OSGi.

console (or telnet) commands

(telnet only) toggle command to get stdout / stderr on the telnet output

dump

Bundle installation

install mybundle.jar

Bundle start

start mybundle.jar

Bundle installation and start alias

i -S mybundle.jar

Bundle restart alias

rs mybundle.jar

rs 42

Bundle update := uninstall, install, start

update mybundle.jar

update 42

whole prosyst OSGi framework restart (you will loose the telnet connection)

rs 0

for more information : runtime_console 7.5 doc

How to resize a VirtualBox Ubuntu vm hard drive

HowTo : resize ubuntu vm hard drive hosted on Virtual Box

Pre-requisites

on host (host is the computer having virtualbox) :

VirtualBox version should be greater than 4.0.0
you should have enough space to clone your VM and available space (using to extend your hard drive)
you should have enought space to get gparted livecd (130Mo)

Step by step

original Ubuntu will be called "oU" and the clone "oUextended"

on oU menu halt ubuntu (or stop oU using VirtualBox)
on virtualbox : right clic on oU, then (context menu) clone "oU"

name the clone "oUextended" (or wathever you want)

on host under a shell : go under oUextended directory and use this command to extend for example to 25GB the hard drive :

 c:\Users\myuser\VirtualBox VMs\UBUNTU_EXTENDED_25G>"c:\Program Files\Oracle\Virtual Box\VBoxManage.exe" modifyhd UBUNTU_EXTENDED_25G.vdi --resize 25625  
 0%...10%...20%...30%...40%...50%...60%...70%...80%...90%...100%

on virtualbox : oUextended/configuration you should show the hard drive size : 25G (==25625MB)
on virtualbox : oUextended/configuration you should assert booting on CD before hard drive

go to http://gparted.sourceforge.net/download.php and download the last stable gparted ISO
on virtualbox : oUextended/configuration/storage : add a CD and select gparted iso
on virtualbox : start oUextended
on oUextended : boot menu : select the first and default choice : "GParted Live"
on oUextended : anwer gparted question (depending of your preferences) : eg. keyboard azerty / fr / PC Keyboard / 08 French / (0)
on oUextended : select the parent ("extended") of the partition you would like to extend : right clic on it / resize / extend to the full free size

on oUextended : the parent ("extended") of the partition should have 24Gio size
on oUextended : select the partition you would like to extend : right clic on it / resize / extend to the full free size

on oUextended : the partition should have 24Gio size
on oUextended : clic on "Apply" / wait the operations to finish / clic "Close"
on oUextended : clic on "Exit" on the gparted desktop; then select "shutdown" / enter
on virtualbox : oUextended/configuration/storage : remove gparted iso CD (should be an empty CD)
on virtualbox : start oUextended

Assert the result on ubuntu xterm :

df -kh

Resources

gparted : official website
gparted : gparted french ubuntu documentation
storage related question : virtualbox documentation
a youtube video on how to resize VirtualBox hard drive
codeformatter help me to format this article

Analyser les performances

Disque dur

Applications imposées

Lister

Désinstallation

Réinstaller une application

Sources utilisées

GPG minimal how-to !

(option A) Define a post action in first job

(option B) Chain it using shell scripts

Install Build Token Root Plugin

Define first job with parameter

Define follower job with parameter

Define a trigger for the follower

Append a shell script to chain the two jobs

Try!

Windows : basic command (to execute from [WINDOWS + R])

god mode (Windows 10)

network related commands

other usefull common tools

Tomcat HTTPS application : how to use a valid and trusted self-signed certificate for localhost

Context

Generate a self signed certificate

Tomcat ssl configuration

Append this certificate to your workstation certificates manager

SSL Client : "PKIX path building failed" error

Java error

Java workarounds

Windows

Windows

Linux

console (or telnet) commands

HowTo : resize ubuntu vm hard drive hosted on Virtual Box

Pre-requisites

Step by step

Resources

Mots clés du blog