Synology How to capture a Synology Package during installation

I recently discovered GateOne, a free HTML5 web-based terminal emulator and SSH client for which there is a Package for Synology on the SynoCommunity. Unfortunately, the setup doesn't work anymore on the most recent DSM versions. As SynoCommunity prevents users to manually download their SPK, I did recover it from Synology's temp download in order to fix myself the issues reported here and recreate a package.

[EDIT 30/12/2018] I have posted a new version of this script here.

Click to Read More

So, as one cannot manually download the Synology package (SPK file), the idea is to simply capture the SPK during its installation (even if that installation fails).

First, log into a SSH console via putty and enter root mode.

Create the following script, named ''


if [ -z "$VOLUME" ]; then
echo "usage: capture <source VOLUME> <target dir>"
exit 0

if [ -z "$TARGET" ]; then
echo "usage: capture <source VOLUME> <target dir>"
exit 0

if [[ ! $VOLUME =~ $pattern ]]; then
echo "The name of the source volume must be like 'volume<i>' where <i> is numeric"
exit 0

if [ ! -d "/$VOLUME/@tmp" ]; then
echo "Temporary dir not found: /$VOLUME/@tmp"
exit 0

if find "/$VOLUME/@tmp/" -mindepth 1 -print -quit | grep -q .; then
rm -R /$VOLUME/@tmp/*

echo "Press any key to stop the capture"

if [ -t 0 ]; then stty -echo -icanon -icrnl time 0 min 0; fi

while [ "x$keypress" = "x" ]; do
let count+=1
echo -ne $count'\r'
keypress="`cat -v`"
cp -R "/$VOLUME/@tmp" "$TARGET/SynoCapture"

if [ -t 0 ]; then stty sane; fi

echo "$count captures done"
exit 0

This script will

  1. first, delete the temporary folder from the volume where you will install the package to be captured. Ex.: /volume1/@tmp
  2. next, loop until you press any key. And during the loop, it will copy any (new) content from the temporary folder into a folder named 'SynoCapture' on a target shared folder. Ex.: on your NAS' web folder /var/services/web/

So, concretely,

  1. Run the script via a command like: ./capture volume1 /var/services/web/
  2. Install your package via the package manager
  3. Stop the script by pressing any key once the package has been installed
  4. (You may now uninstall your package)

Voilà, first step accomplished. Now, look into your capture (Ex.: in \\<Your NAS>\web\SynoCapture\).

  1. You should see a folder named "@synopkg\@download\<Package>". This folder contains the package but without its file extension .spk (Ex.: @SYNOPKG_DOWNLOAD_<Package>).  Gotcha !!!
  2. You should also see a folder named "pkginstall". This one contains the package deflated.
  3. Now, a little extra... you should also find a folder name "pkglist.tmp" containing two files: synoserver.enu and : otherserver.enu (with possibly other extensions depending on your DSM language?). Those files contains the URL's of all SPK available respectively on the official Synology website and on the various SPK servers that you configured in your Package Center > Settings > Package Sources.

If you are running Windows 10 with Powershell, copy the content of those files into on file named input.txt and open a powershell in the folder where you have saved that input.txt file. Execute next this to filter the file and extract the URL's:

select-string -Path input.txt -Pattern 'http[^"]*\.spk[^"]*' -AllMatches | % { $_.Matches } | select-object Value > output.txt

You can copy/paste the content of output.txt into MyJDownloader (asking for a "deep link analysis"!). Magic !

SynologyWordpress WordPress RewriteRule to "Redirect" after moving the blog

I did reconfigure my Synology Web Stations to access my blog directly at instead of The problem was to redirect next the old pages still referenced by google onto their new address. Ex.: onto Using a RewriteRule did the trick.

Click to Read More

Concretely, I did configure a Virtual Host in the Web Station

WebStation VirtualHost

Next, I did reconfigure wordpress's wp-config.php by replacing:

define('WP_SITEURL', $pageURL . '/wordpress');


define('WP_SITEURL', $pageURL');

Finally, I did remove "/wordpress" from all URL's in my own posts. I didn't use a Search & Replace plugin like the "Better Search and Replace" to do the update directly in the database. Instead, I did use the plugin "Broken Link Checker" to Bulk Edit broken URLs.

Bulk Edit Broken URLIt took more time but was a much more "clean" approach as I only touched for sure broken links. (Notice: This Plugin runs in the background so you need patience for it to get the complete list of broken URLs. What' really great is that for broken external links, it suggests the replacement by an archived version of the missing pages - via the WayBack Machine)

WayBack Machine

NB.: Here is another nice trick to list all broken URL's in a website

wget --spider -o /var/log/wget.log -e robots=off -w 1 -r -p http://<youraddress>

Finally, I had to redirect all old pages still referenced on Google to their new location. The obvious solution was to use a RewriteRule to be added in the .htaccess file used by WordPress (In my case, in /var/services/web/wordpress/.htaccess). Unfortunately, it took me hours to find the trick as, instead of reading the whole apache's RewriteEngine documentation, I tried to figure out myself how to do it, based on samples found on the web.

Finally, I read these french documentations:

And it's only by reading the documentation about the flag that I understood the need to use the special flag [R] (I already tried at least more than 20 various rules before understanding I had to specify the flag R(edirect)...)

So, here it is: RewriteRule ^wordpress/(.*)$ /$1 [R,L]

  • Match any path starting with "wordpress/" and followed by "anything else"
  • Replace it with the part matching "anything else"
  • And if a match was found, do a R(edirect) and this was the L(ast) rule to apply (i.e.: stop).

I didn't change anything else. Also, changes in the .htaccess are taken into account immediately, without the need to restart the WebStation.

# Synology PHP
AddHandler default-handler .htm .html .shtml
AddHandler php-fastcgi .php
AddType text/html .php
Action php-fastcgi /php56-fpm-handler.fcgi
# Synology PHP

# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^wordpress/(.*)$ /$1 [R,L]
RewriteRule ^index\.php$ - [L] RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L] </IfModule>

# END WordPress

Et voilà.

NB.: Here is a useful website to test online .htaccess RewriteRule's

Synology Synology Package Sample to illustrate how scripts and wizards are executed

I had troubles to use variables in various scripts or to create wizards via shell scripts. So I have created a dummy package logging useful information in a file to understand what's going on during the installation, the upgrade and the uninstallation of a Synology Package.

Click to Read More

This package is named MODS SPK Tracer and is available on my SPK Server. Obviously, i has been created with my Synology Package Creator tool for Windows ;)

Once installed, upgraded or removed (and obviously reinstalled), you can access its log file either by clicking on its icon in DSM's Main Menu, or by via the Package Center.

Mods SPK Tracer

This package comes with shell scripts creating on the fly "installation", "upgrade" and "uninstallation" wizard (,, The purpose is to illustrate how to inject environment variables in the JSON wizard and how to use php in such scripts. Briefly said, they must generate a JSON wizard and store it in the standard log file $SYNOPKG_TEMP_LOGFILE

While testing those wizard scripts, I have discovered that, at runtime, only the running script is stored in the temporary folder. The other ones are not available. No way therefore to call another script from the running one.

The Wizards are exporting one variable to the installation scripts, for illustration purpose (I.e.: how to prompt the user for some input to be used later by the scripts)

Finally, the wizard scripts also logs the environment variables exported for them by the DSM. Not a lot are available during the execution of the wizard because the SPK is actually not yet expanded.

The package comes next with the standard installation scripts, calling all a generic script that log the environment variables exported for them by the DSM. So, you can see in which script you have access to which variable. The scripts preinst, postinst, preuninst, postuninst, preupgrade and postupgrade have access to the same variables. But it's not the case for the start-stop-status script.

Those scripts are also displaying info during the installation/upgrade/uninstallation process for the user. For that purpose, they write in the standard log file $SYNOPKG_TEMP_LOGFILE. Obviously the wizard scripts can't use this trick to display information to the user. But they don't need that as they actually display real screens (rendition of their JSON).

Notice: often, variables accessible for a script must be persisted in a file to be retrieved later by another script. Ex.: the postinst script can store a variable received from the install_uifile wizard in a file so it can be read by the postupgrade or postuninst script later.

Notice: the log file is only available in the Package Center if its path is returned by the start-stop-status script.

Notice: the INFO file of this Package is quite standard.

What's interesting is to see the order of execution. Ex.: for an upgrade

SPK Tracer order

Also, during an upgrade, the script to stop, preuninst and postuninst are the versions of the previous package, not the versions of the new package !!! (Obviously).

During an upgrade, preupgrade and preinst scripts are executed from a temporary folder (/volume1/@tmp/pkginstall/scripts), while postupgrade, postinst, and the script to start, are executed from the target installation directory (/var/packages/<Package Name>/scripts)

Synology Install a Simple SPK Server on Synology

There is a really excellent project named SSPKS available here to host your own SPK Server on your NAS.

Click to Read More


To install it, you will need several other things first :

  1. Git, to be installed as explained here.
  2. Composer, to be installed as explained here.

Get the sources

Now, open a SSH Console using Putty, log in as an administrator and enter the root mode.

Look for the Git URL of the SSPKS project :

Clone GitHub Repository

Clone GitHub Repository

In the SSH console, type the command:


git clone

You should see the following output:

Cloning into 'sspks'...
remote: Counting objects: 1443, done.
remote: Total 1443 (delta 0), reused 0 (delta 0), pack-reused 1443
Receiving objects: 100% (1443/1443), 1.31 MiB | 705.00 KiB/s, done.
Resolving deltas: 100% (717/717), done.
Checking connectivity... done

complete the source

Run the following command (it's using the script named "composer" created as illustrated in the How to "install Composer on Synology"):

cd sspks

composer install --no-dev

It should display the following output:

Loading composer repositories with package information
Installing dependencies from lock file
Warning: The lock file is not up to date with the latest changes in composer.json. You may be getting outdated dependencies. Run update to update them.
Package operations: 2 installs, 0 updates, 0 removals
Failed to download mustache/mustache from dist: The zip extension and unzip command are both missing, skipping.
The php.ini used by your command-line PHP is: /usr/local/etc/php56/php.ini
Now trying to download from source
- Installing mustache/mustache (v2.11.1): Cloning a3f6d55996
Failed to download symfony/yaml from dist: The zip extension and unzip command are both missing, skipping.
The php.ini used by your command-line PHP is: /usr/local/etc/php56/php.ini
Now trying to download from source
- Installing symfony/yaml (v3.2.1): Cloning a7095af4b9
Generating autoload files

Next, move the complete stuff to your web site and link it with a folder 'package' where you will store your spk files. Here, I am using a folder in the web repository.


cp -R sspks /var/services/web/sspks

cd /var/services/web/

mkdir packages

cd sspks

chmod o+w cache

rm -R packages

ln -s /var/services/web/packages packages

In a browser, open the test page: http://<your NAS>/sspks/selftest.php

If everything is OK, copy now some spk filez in to the 'package' folder (I.e.: in \\<Your_NAS>\web\packages). For each spk file named XXX.spk, add:

  • its logo named XXX_thumb_72.png (size 72x72)
  • its logo named XXX_thumb_120.png (size 120x120)
  • its INFO file named XXX.nfo
    • This one can be extracted from the spk

Finally, open the main page: http://<your NAS>/sspks

Et voilà.

Synology Install Composer on Synology

Here is how to install Composer on a Synology, required among other to install various php applications available on GitHub, like the "Simple SPK Server".

Click to Read More

Connect into your DSM, open the Web Station via the Main Menu and enter the PHP Settings. There, select first the "PHP version" = "PHP 5.6", tick the Extensions: curl, openssl and phar, and click Apply. Next, do the same for the "PHP version" = "PHP 7.0".

WebStation Composer Option

Now, open a SSH Console via Putty, log in as an administrator and enter next the root mode.

Finally, install Composer with the following commands:

cd /usr/local/bin
curl -s | php56

This should display the following message:

All settings correct for using Composer

Composer (version 1.3.1) successfully installed to: /usr/local/bin/composer.phar
Use it: php composer.phar

On Synology, php is not the command to use to run Composer. Instead, one should use php56 or php70. Ex.:

php56 composer.phar --version

To make use of it more easily, you can create a script. Use the command vi

vi composer

Enter the modification mode by typing the letter "i".

Type the following text:

php56 /usr/local/bin/composer.phar $*

Press 'Esc' to quit the modification mode.

To write the changes and quit vi, type next ":wq" (without the quotes).

Make the script executable with the following command:

chmod +X composer

Try now:

composer --version

Et voilà.

Synology Launch a SSH console onto Synology with Putty

Here is how to connect onto a Synology and run a SSH console to, e.g., run linux commands, execute scripts, etc...

Click to Read More

Enable SSH

Log as admin into your Synology via the DSM web interface. If you don't know its URL anymore, run the Synology Assistant on your PC (The setup can be found for your model on Synology's download page) to find your NAS. Right-click on it to connect.

Synology Assistant

Notice that for illustration purpose, my NAS is named here "Hades" and has as local IP.

Once logged in DSM, open the Control Panel. If you see only three lines of icons (titled File Sharing, Connectivity and System), then click on the blue link "Advanced Mode" in the top-right corner.

Control Panel Basic

You should see a dark "console" icon named Terminal & SNMP in a fourth section named Applications.

Control Panel Advanced

Click on that icon and in the tab Terminal appearing now, tick the option Enable SSH service. Configure the Port number that your want to use, E.g. 22, 5022, or any port still free.

Control Panel Terminal

Notice the message: only account in the administrators group will be able to log in SSH console. On the opposite, you won't be able to log in with the root account.

The System default user should be such an administrator account. But you can create another one and add it in the administrators User group. Ex. here after a user named "administrator":

Control Panel User Administrator

Also, as recommended, go next into the Security section of the Control Panel and enter the Account tab to tick the option Enable auto block. E.g.: you can block there any IP address which failed 3 times to log in during the last 15'. You can also tick the option Enable block expiration to unblock such IP after e.g. 15 days.

Control Panel Security Account

Notice: this "auto block" feature has been very useful for me when I started to use a VPN on my NAS to access internet. Many IP, mainly from Russia and China, have been blocked.

PS.: SSH is recommended over Telnet, as using encrypted communications. But if you really want, you can also enable it.

Install Putty and open a SSH console

Download Putty from here and install it on your PC. It's an open source SSH and telnet client.

Run Putty and enter an administrator account in the Auto-login username of the category Connection > Data (as illustrated bellow in the right screenshot, I am user the user named "administrator" created previously and member of the User Group "Administrators"). Next enter your Host Name (or IP address) and Port in the Category Session (as illustrated bellow in the left screenshot). Check that the selected Connection Type is SSH.Finally, select the Default Settings entry and click on the Save button next to it. This is important to keep your setting for the next time you will run Putty.

Putty SSH Console

Now, click on the Open button and the bottom-right. This will start the SSH session with the preconfigured account "administrator" . You just have to type his password.

Putty SSH Console Login

Notice: on the first use, Putty will display a warning message about the encryption. You have to accept it.

PS.: You can similarly open a Telnet session if you did enable it.

Enter root mode

Although you may not log in as root in a SSH console on your Synology, you may enter "root" mode by typing the following command:

sudo -i

You will be prompted for a password. Type again the password of the administrator account.

Voilà, you are now connected on your NAS as a root.

Control Panel User Root


PS.: Here is the official Synology documentation to log on your NAS via SSH or Telnet.

Synology Plex Media Server Package not starting anymore after moving its Library

In order to empty a volume of my Synology, I did move all shared folders from that volume to another. After this operation, I was not able to play movies anymore with Plex. I noticed that, although I was still able to browse the movies via my Plex Apps, the Plex Media Server Package was actually stopped and unable to restart. To fix this, I had to edit the path of plex's library in the adequate config file.

Click to Read More

Moving some "standard" Shared Folders used by Synology's Packages didn't result in any issue. Ex.: when moving the "music" folder, Synology prompted me to ask if it could stop properly the "Audio Station". And once the folder moved, I was able to restart the "Audio Station" without any problem later.

But this wasn't the case for the "Plex" folder.

Moving Shared Folders

Moving Shared Folders

Opposite to moving the "music" folder, Synology didn't stop here explicitly the "Plex Media Server" Package. But once the "Plex" folder moved, the Package appeared to be stopped anyway. And trying to restart it, the following error was displayed by the Package Manager: Failed to run the package service ...

I found the following error in the log file using the command: cat /var/log/messages

init: pkgctl-Plex Media Server pre-start process terminated with status 1
synoscgi_SYNO.Core.Package.Control_1_start: servicecfg_internal_lib.c: Failed to start job [pkgctl-Plex Media Server] [0xD900 privilege.cpp]

What was weird, is that I was still able to browse the movies in Plex Apps. The reason was that Plex processes were still running as I noticed later.

To fix the problem, I did open a SSH Console using Putty, logged in as admin and went into root mode by typing the command: sudo -i

I did next kill all the Plex processes:  kill -9 $(ps -gaceux | grep 'plex' | awk '{print $2}')

I went to the Plex Media Server path: cd /var/packages/Plex Media Server/target

And did replace the old volume of the library (volume3) with the new one (volume1) : sed -i "s/volume3/volume1/" plex_library_path

Et voilà, I was next able to start the Plex Media Server Package.

Synology Synology Cloud Station and Cloud Sync are slow

I was wondering why Cloud Station Backup and Cloud Sync were so slow on my NAS. It appeared that it was "normal" for Cloud Sync, but could be improved for Cloud Station Backup, especially on my LAN, by using my NAS' local IP instead of the "QuickConnect" feature.

Click to Read More

Cloud Station

I found here that using "QuickConnect" with Cloud Station, the traffic was routed through Synology’s servers, making it incredibly slow. In my LAN, it really accelerated as soon as I replaced QuickConnect by the local IP of my NAS or with a domain address resolved by my local DNS.

Cloud Sync

I found here the reason why Cloud Sync was slower than native Sync applications. The answer given by Synology is:

Could Sync is performing sync, it is heavy process, please see below detailed information from help:Why is Cloud Sync slower than other cloud services' PC applications?

Due to the below limitations, Cloud Sync might take longer to sync files with public cloud services than the official PC applications such as Dropbox and Baidu.


  • Speed limits imposed by cloud service providers: Although no public cloud service provider has disclosed any information related to this topic, it is highly possible that public cloud servers communicate with their official PC applications through a dedicated tunnel/protocol, or impose bandwidth limitations on third-party applications that access their services on a regular basis (such as Cloud Sync).
  • No incremental update: Some cloud service providers do not releases a public API for developers to track file changes. This means Cloud Sync must re-download and sync the entire file every time a file has been modified, even when you've only made partial modifications. On the other hand, cloud service providers' official PC applications might be able to re-download and sync the modified bits only, reducing sync time.
  • No local network sync: Certain public cloud service providers offer LAN sync, a technique that allows one client to obtain files from existing clients in the same local area network (LAN), thus significantly boosting sync speed. However, LAN sync accesses files in client computers without notifying them, which could possibly become a security backdoor. Therefore, this feature is not included in Cloud Sync.

Given the above limitations, the syncing performance of Cloud Sync shall continue to be enhanced, while also maintaining the safety and security of your Synology NAS.

DS currently does not control the sync speed, and does not have function to enhance it.

However, we will continue to try improve our service and product.

Synology df and du commands hanging/very slow and not displaying all info

I have developed a Synology Package to move Packages from a volume to another. He suddenly became very slow when trying to display the list of Packages and Volumes existing on my NAS. I finally found that it was due to mount points not accessible and making the 'df' command not responsive.

Click to Read More

In my Package, named Package Mover (See Blog's menu SPK Server), I am using the command 'df' to list the existing Volumes. This is the one that was extremely slow.

To investigate the problem, I did display the errors of the System Kernel with the command 'dmesg' and found plenty of messages like ''CIFS VFS: Unexpected lookup error -112"

I also noticed that when 'df' was finally displaying results, there was no information about the volume1.

As by accident, I remembered that I did use CIFS VFS to recently mount some shared drives of a remote Windows Server, I checked if there was any issue with those. And there was:

xxxx:~# ls -la /volume1/mount/Storage/
ls: cannot access /volume1/mount/Storage/Movies: Host is down
ls: cannot access /volume1/mount/Storage/Series TV: Host is down
ls: cannot access /volume1/mount/Storage/Series: Host is down

total 0
drwx------+ 1 admin users 42 Oct 15 19:00 .
d---------+ 1 root root 42 Oct 14 11:56 ..
d?????????? ? ? ? ? ? Movies
d?????????? ? ? ? ? ? Series
d?????????? ? ? ? ? ? Series TV

I noticed how serious was this issue when my shell crashed while trying to autocomplete the name of a mounted folder:

umount /volume1/mount/Storage/^C
malloc: unknown:0: assertion botched
free: called with unallocated block argument
last command: ls /volume1/mount/
Aborting...Aborted (core dumped)

=> Shell killed !!

So, I did unmount and delete all the subfolders, and the problem disappeared

xxx:~# umount /volume1/mount/Storage/Movies
xxx:~# umount /volume1/mount/Storage/Series
xxx:~# umount /volume1/mount/Storage/Series\ TV
xxx:~# ls /volume1/mount/Storage/
Movies Series Series TV
xxx:~# rm -R /volume1/mount/Storage/Movies
xxx:~# rm -R /volume1/mount/Storage/Series
xxx:~# rm -R /volume1/mount/Storage/Series\ TV
xxx:~# ls /volume1/mount/Storage/

Now, 'df' executes within a ms and lists all the expected information!

Synology WebStation 2.1.0-0128 beta - php display_error enabled

I did update my WebStation to the latest beta version. And although the option to "enable Display_Errors to display php error message" was disabled in the WebStation configuration pane, I saw warnings everywhere in my WordPress blog. No choice but erase the WebStation and reinstall it.

Click to Read More

Errors were appearing although the option was disable both for php 7.0 and php 5.6.

Enable Php Display Errors

Enable Php Display Errors

Impossible to uninstall the WebStation as the Configuration Center see that various other Packages denpend on it: Apache2.4, WordPress, Apache2.2, phpMyAdmin.

Also impossible to downgrade by manually installing a previous version.

So, I had no choice but connect on my NAS via a SSH console using Putty and enter the root mode (with the command sudo -i) to delete the WebStation Setup :

  • ls -la /var/packages/WebStation/target  => this is showing you the volume<x> where it's installed
  • rm -R /usr/syno/etc/packages/WebStation
  • rm -R /var/packages/WebStation
  • rm -R /volume<x>/@appstore/WebStation
  • rm -f /usr/syno/synoman/webman/3rdparty/WebStation

I did next manually installed the WebStation 2.0.1-0111 from

I had to reconfigure the General Settings and Php Settings, et voilà.