Bonjour, j'ai installé une distribution linux orienté plex que j'administre en ssh. Mais j'aimerai aussi faire du bureau à distance avec lxde. Le probleme étant que je ne sais pas s'il y a gnome de déjà installé dessus. Il y a t-il une ligne de commande pour avoir cette info? Et s'il est installé es ce que je peux installé lxde en plus?
Cordialement
ls -l /usr/share/xsessions
Maintenant, il est tout à fait déconseillé de faire cohabiter deux environnements (où alors tu installes un nouvel utilisateur)
ok super. Merci pour ta réponse.
Du coup gnome n'est pas installé, j'en ai donc profité pour installer lxde.
tout c'est bien déroulé.
J'ai un autre probleme. lors de l'installation de certains logiciels (comme anydesk en .deb), j'ai des problèmes de dépendances non installées.
J'ai bien installé software-properties-gtk an selectionnant les différentes sources mais rien n'y fais.
retour de la commande: 
sudo dpkg -i anydesk_2.9.5-1_amd64.deb 
Selecting previously unselected package anydesk.
(Reading database ... 84678 files and directories currently installed.)
Preparing to unpack anydesk_2.9.5-1_amd64.deb ...
Unpacking anydesk (2.9.5-1) ...
dpkg: dependency problems prevent configuration of anydesk:
 anydesk depends on libgtkglext1; however:
  Package libgtkglext1 is not installed.

dpkg: error processing package anydesk (--install):
 dependency problems - leaving unconfigured
Processing triggers for menu (2.1.46ubuntu1) ...
Processing triggers for desktop-file-utils (0.22-1ubuntu1.1) ...
Processing triggers for mime-support (3.54ubuntu1.1) ...
Processing triggers for hicolor-icon-theme (0.13-1) ...
Processing triggers for man-db (2.6.7.1-1ubuntu1) ...
Errors were encountered while processing:
 anydesk
A priori il faudrait un : 
sudo apt install libgtkglext1
Mais je n'ai jamais eu à le faire et ne comprend pas tout ce que tu décris.
Donne les retours de : 
ls -l /usr/share/xsessions
cat /etc/apt/sources.list
ls /etc/apt/sources.list.d -1
sudo apt install libgtkglext1
oui quand j'ai essayé de faire ça il me dit qu'il manque des encore des dépendances ... etc
ls -l /usr/share/xsessions
total 8
-rw-r--r-- 1 root root 458 mars  16  2013 LXDE.desktop
-rw-r--r-- 1 root root 198 janv. 24 13:47 openbox.desktop


cat /etc/apt/sources.list
# deb http://mirrors.online.net/ubuntu trusty main restricted

# deb http://mirrors.online.net/ubuntu trusty-updates main restricted
# deb http://security.ubuntu.com/ubuntu trusty-security main restricted

# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://mirrors.online.net/ubuntu trusty main restricted
deb-src http://mirrors.online.net/ubuntu trusty main restricted

## Major bug fix updates produced after the final release of the
## distribution.
deb http://mirrors.online.net/ubuntu trusty-updates main restricted
deb-src http://mirrors.online.net/ubuntu trusty-updates main restricted

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team. Also, please note that software in universe WILL NOT receive any
## review or updates from the Ubuntu security team.
deb http://mirrors.online.net/ubuntu trusty universe
deb-src http://mirrors.online.net/ubuntu trusty universe
deb http://mirrors.online.net/ubuntu trusty-updates universe
deb-src http://mirrors.online.net/ubuntu trusty-updates universe

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu 
## team, and may not be under a free licence. Please satisfy yourself as to 
## your rights to use the software. Also, please note that software in 
## multiverse WILL NOT receive any review or updates from the Ubuntu
## security team.
deb http://mirrors.online.net/ubuntu trusty multiverse
deb-src http://mirrors.online.net/ubuntu trusty multiverse
deb http://mirrors.online.net/ubuntu trusty-updates multiverse
deb-src http://mirrors.online.net/ubuntu trusty-updates multiverse

## N.B. software from this repository may not have been tested as
## extensively as that contained in the main release, although it includes
## newer versions of some applications which may provide useful features.
## Also, please note that software in backports WILL NOT receive any review
## or updates from the Ubuntu security team.
deb http://mirrors.online.net/ubuntu trusty-backports main restricted universe multiverse
deb-src http://mirrors.online.net/ubuntu trusty-backports main restricted universe multiverse


## Uncomment the following two lines to add software from Canonical's
## 'partner' repository.
## This software is not part of Ubuntu, but is offered by Canonical and the
## respective vendors as a service to Ubuntu users.
# deb http://archive.canonical.com/ubuntu trusty partner
# deb-src http://archive.canonical.com/ubuntu trusty partner

## Uncomment the following two lines to add software from Ubuntu's
## 'extras' repository.
## This software is not part of Ubuntu, but is offered by third-party
## developers who want to ship their latest software.
# deb http://extras.ubuntu.com/ubuntu trusty main
# deb-src http://extras.ubuntu.com/ubuntu trusty main
deb http://archive.ubuntu.com/ubuntu trusty main universe restricted multiverse

ls /etc/apt/sources.list.d -1
plexmediaserver.list
plexmediaserver.list.save
Merci pour ton aide 🙂
On dirait que tes sources ne sont pas claires, ceci explique peut-être les paquets qui ne veulent pas.

On va les mettre au propre (j'ai supposé que tu es en France on pourra corriger ultérieurement si ce n'est pas le cas) : 
sudo wget https://repogen.simplylinux.ch/txt/trusty/sources_4be96ed39931e8792afabf7ae6fde3bb7a901c6e.txt -O /etc/apt/sources.list
Puis nettoyage et mise à jour : 
sudo apt clean -v
[[ $(dpkg -l | grep ^rc) ]] && sudo dpkg -P $(dpkg -l | grep ^rc | tr -s " " | cut -d " " -f 2)
sudo apt update
sudo apt full-upgrade
sudo apt autoremove --purge
Puis redémarre, puis retente : 
sudo dpkg -i anydesk_2.9.5-1_amd64.deb
Donne tous les retours.
sudo wget https://repogen.simplylinux.ch/txt/trusty/sources_4be96ed39931e8792afabf7ae6fde3bb7a901c6e.txt -O /etc/apt/sources.list
--2018-06-04 20:23:05--  https://repogen.simplylinux.ch/txt/trusty/sources_4be96ed39931e8792afabf7ae6fde3bb7a901c6e.txt
Resolving repogen.simplylinux.ch (repogen.simplylinux.ch)... 176.9.139.175, 2a01:4f8:160:13a2::1005
Connecting to repogen.simplylinux.ch (repogen.simplylinux.ch)|176.9.139.175|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 824 [text/plain]
Saving to: ‘/etc/apt/sources.list’

100%[================================>] 824         --.-K/s   in 0s      

2018-06-04 20:23:05 (62,1 MB/s) - ‘/etc/apt/sources.list’ saved [824/824]

sudo apt-get clean -v
apt 1.0.1ubuntu2 for amd64 compiled on Apr 12 2018 10:14:36
Supported modules:
*Ver: Standard .deb
*Pkg:  Debian dpkg interface (Priority 30)
 Pkg:  Debian APT solver interface (Priority -1000)
 S.L: 'deb' Standard Debian binary tree
 S.L: 'deb-src' Standard Debian source tree
 Idx: Debian Source Index
 Idx: Debian Package Index
 Idx: Debian Translation Index
 Idx: Debian dpkg status file
 Idx: EDSP scenario file
Je me suis permis de mettre apt-get au lieu de apt car ca ne marchait pas
[[ $(dpkg -l | grep ^rc) ]] && sudo dpkg -P $(dpkg -l | grep ^rc | tr -s " " | cut -d " " -f 2)
pas de retour
sudo apt update
Ign http://extras.ubuntu.com trusty InRelease
Ign http://fr.archive.ubuntu.com trusty InRelease             
Hit http://extras.ubuntu.com trusty Release.gpg                
Hit http://fr.archive.ubuntu.com trusty-security InRelease     
Hit http://extras.ubuntu.com trusty Release                    
30% [InRelease gpgv 65,9 kB] [Waiting for headers] [Connecting to archive.                                                                          Hit http://fr.archive.ubuntu.com trusty-updates InRelease
                                                                          Hit http://fr.archive.ubuntu.com trusty-backports InRelease       
18% [Release gpgv 11,9 kB] [Waiting for headers] [Connecting to archive.ca                                                                          Hit http://fr.archive.ubuntu.com trusty Release.gpg
                                                                          22% [InRelease gpgv 65,9 kB] [Waiting for headers] [Connecting to archive.                                                                          Hit http://fr.archive.ubuntu.com trusty-security/main amd64 Packages
22% [InRelease gpgv 65,9 kB] [Waiting for headers] [Connecting to archive.                                                                          Hit http://extras.ubuntu.com trusty/main amd64 Packages
22% [InRelease gpgv 65,9 kB] [Waiting for headers] [Connecting to archive.22% [Packages 5 199 kB] [InRelease gpgv 65,9 kB] [Waiting for headers] [Co18% [Packages 5 199 kB] [Waiting for headers] [Connecting to archive.canon                                                                          Hit http://fr.archive.ubuntu.com trusty-security/restricted amd64 Packages
18% [Packages 5 199 kB] [Waiting for headers] [Connecting to archive.canon18% [Packages 5 199 kB] [InRelease gpgv 65,9 kB] [Waiting for headers] [Co                                                                          Hit http://extras.ubuntu.com trusty/main i386 Packages
18% [Packages 5 199 kB] [InRelease gpgv 65,9 kB] [Waiting for headers] [Co                                                                          Hit http://fr.archive.ubuntu.com trusty-security/universe amd64 Packages
18% [Packages 5 199 kB] [InRelease gpgv 65,9 kB] [Connecting to archive.ca16% [Packages 5 199 kB] [Waiting for headers] [Connecting to archive.canon                                                                          Hit http://fr.archive.ubuntu.com trusty-security/multiverse amd64 Packages
16% [Packages 5 199 kB] [Waiting for headers] [Connecting to archive.canon                                                                          Hit http://fr.archive.ubuntu.com trusty-security/main i386 Packages
16% [Packages 5 199 kB] [Connecting to archive.canonical.com] [Waiting for                                                                          Hit http://fr.archive.ubuntu.com trusty-security/restricted i386 Packages
16% [Packages 5 199 kB] [Connecting to archive.canonical.com] [Waiting for                                                                          Hit http://fr.archive.ubuntu.com trusty-security/universe i386 Packages
16% [Packages 5 199 kB] [Connecting to archive.canonical.com] [Waiting for                                                                          Hit http://fr.archive.ubuntu.com trusty-security/multiverse i386 Packages
16% [Packages 5 199 kB] [Connecting to archive.canonical.com] [Waiting for                                                                          Hit http://fr.archive.ubuntu.com trusty-security/main Translation-en
16% [Packages 5 199 kB] [Connecting to archive.canonical.com] [Waiting for                                                                          Hit http://fr.archive.ubuntu.com trusty-security/multiverse Translation-en
16% [Packages 5 199 kB] [Connecting to archive.canonical.com] [Waiting for                                                                          Ign http://extras.ubuntu.com trusty/main Translation-en_US
18% [Packages 5 199 kB] [Waiting for headers] [Connecting to archive.canon                                                                          Ign http://extras.ubuntu.com trusty/main Translation-en
20% [Packages 5 199 kB] [Waiting for headers] [Connecting to archive.canon                                                                          Hit http://fr.archive.ubuntu.com trusty-security/restricted Translation-en
                                                                          Hit http://fr.archive.ubuntu.com trusty-security/universe Translation-en
Hit http://fr.archive.ubuntu.com trusty Release              
20% [Packages 5 199 kB] [Release gpgv 58,5 kB] [Waiting for headers] [Conn16% [Packages 5 199 kB] [Waiting for headers] [Connecting to archive.canon                                                                          Hit http://fr.archive.ubuntu.com trusty-updates/main amd64 Packages
                                                                          100% [Packages 0 B] [Waiting for headers] [Connecting to archive.canonical                                                                          100% [Packages 132 kB] [Waiting for headers] [Connecting to archive.canoni                                                                          Hit http://fr.archive.ubuntu.com trusty-updates/restricted amd64 Packages
                                                                          100% [Packages 0 B] [Waiting for headers] [Connecting to archive.canonical                                                                          100% [Packages 1 358 kB] [Waiting for headers] [Connecting to archive.cano                                                                          Hit http://fr.archive.ubuntu.com trusty-updates/universe amd64 Packages
                                                                          Hit http://fr.archive.ubuntu.com trusty-updates/multiverse amd64 Packages
Hit http://fr.archive.ubuntu.com trusty-updates/main i386 Packages
Hit http://fr.archive.ubuntu.com trusty-updates/restricted i386 Packages
Hit http://fr.archive.ubuntu.com trusty-updates/universe i386 Packages
100% [Packages 18,0 kB] [Waiting for headers] [Connecting to archive.canon                                                                          100% [Packages 4 745 kB] [Waiting for headers] [Connecting to archive.cano                                                                          Hit http://fr.archive.ubuntu.com trusty-updates/multiverse i386 Packages
                                                                          Hit http://fr.archive.ubuntu.com trusty-updates/main Translation-en
Hit http://fr.archive.ubuntu.com trusty-updates/multiverse Translation-en
Hit http://fr.archive.ubuntu.com trusty-updates/restricted Translation-en
Hit http://fr.archive.ubuntu.com trusty-updates/universe Translation-en
Hit http://fr.archive.ubuntu.com trusty-backports/main amd64 Packages
Hit http://fr.archive.ubuntu.com trusty-backports/restricted amd64 Packages
Hit http://fr.archive.ubuntu.com trusty-backports/universe amd64 Packages
Hit http://fr.archive.ubuntu.com trusty-backports/multiverse amd64 Packages
Hit http://fr.archive.ubuntu.com trusty-backports/main i386 Packages
Hit http://fr.archive.ubuntu.com trusty-backports/restricted i386 Packages
100% [Packages 131 kB] [Waiting for headers] [Connecting to archive.canoni                                                                          Hit http://fr.archive.ubuntu.com trusty-backports/universe i386 Packages
                                                                          100% [Packages 1 298 kB] [Waiting for headers] [Connecting to archive.cano                                                                          Hit http://fr.archive.ubuntu.com trusty-backports/multiverse i386 Packages
                                                                          Hit http://fr.archive.ubuntu.com trusty-backports/main Translation-en
Hit http://fr.archive.ubuntu.com trusty-backports/multiverse Translation-en
Hit http://fr.archive.ubuntu.com trusty-backports/restricted Translation-en
100% [Packages 18,9 kB] [Waiting for headers] [Connecting to archive.canon                                                                          100% [Translation-en 6 740 kB] [Waiting for headers] [Connecting to archiv                                                                          Hit http://fr.archive.ubuntu.com trusty-backports/universe Translation-en
                                                                          Hit http://fr.archive.ubuntu.com trusty/main amd64 Packages         
Hit http://fr.archive.ubuntu.com trusty/restricted amd64 Packages   
Hit http://fr.archive.ubuntu.com trusty/universe amd64 Packages     
Hit http://fr.archive.ubuntu.com trusty/multiverse amd64 Packages   
Hit http://fr.archive.ubuntu.com trusty/main i386 Packages          
Hit http://fr.archive.ubuntu.com trusty/restricted i386 Packages    
Hit http://fr.archive.ubuntu.com trusty/universe i386 Packages      
Hit http://fr.archive.ubuntu.com trusty/multiverse i386 Packages    
Hit http://fr.archive.ubuntu.com trusty/main Translation-en         
100% [Translation-en 6 740 kB] [Connecting to archive.canonical.com (91.18                                                                          Ign http://archive.canonical.com trusty InRelease
                                                                          Hit http://archive.canonical.com trusty Release.gpg 
Hit http://fr.archive.ubuntu.com trusty/multiverse Translation-en
Hit http://archive.canonical.com trusty Release     
100% [Translation-en 6 740 kB] [Release gpgv 9 359 B] [Waiting for headers                                                                          Hit http://archive.canonical.com trusty/partner amd64 Packages
Hit http://archive.canonical.com trusty/partner i386 Packages
Hit http://archive.canonical.com trusty/partner Translation-en
Hit http://fr.archive.ubuntu.com trusty/restricted Translation-en
Hit http://fr.archive.ubuntu.com trusty/universe Translation-en
Ign http://fr.archive.ubuntu.com trusty/main Translation-en_US
Ign http://fr.archive.ubuntu.com trusty/multiverse Translation-en_US
Ign http://fr.archive.ubuntu.com trusty/restricted Translation-en_US
Ign http://fr.archive.ubuntu.com trusty/universe Translation-en_US
100% [Translation-en 18,6 MB]                                      21,9 MB
100% [Working]                                                     21,9 MB                                                                          
Reading package lists... Done

sudo apt full-upgrade 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Calculating upgrade... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

sudo apt-get autoremove --purge
Reading package lists... Done
Building dependency tree        
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Du coup j'ai redémarré et relancé l'installe de anydesk
meme constat 🙁
Groumpf, j'ai regardé un peu sur le net et, de fait, je ne vois parles de anydesk que pour 16.04 et supérieure (même si ça semble étrange pour du .deb)
ok bon j'ai fait un upgrade vers la 16.04 du coup.
Merci pour ton aide en tout cas ca été instructif 🙂
Rha mais c'est dingue, ca marche tjrs pas: 
Welcome to Ubuntu 16.04.4 LTS (GNU/Linux 4.4.0-127-generic x86_64)

 * Documentation:  https://help.ubuntu.com
 * Management:     https://landscape.canonical.com
 * Support:        https://ubuntu.com/advantage
Last login: Tue Jun  5 12:02:29 2018 from 176.187.212.207
To run a command as administrator (user "root"), use "sudo <command>".
See "man sudo_root" for details.

sudo dpkg -i anydesk_2.9.5-1_amd64.deb  
Selecting previously unselected package anydesk.
(Reading database ... 135217 files and directories currently installed.)
Preparing to unpack anydesk_2.9.5-1_amd64.deb ...
Unpacking anydesk (2.9.5-1) ...
dpkg: dependency problems prevent configuration of anydesk:
 anydesk depends on libgtkglext1; however:
  Package libgtkglext1 is not installed.
 anydesk depends on libpango1.0-0; however:
  Package libpango1.0-0 is not installed.

dpkg: error processing package anydesk (--install):
 dependency problems - leaving unconfigured
Processing triggers for menu (2.1.47ubuntu1) ...
Processing triggers for desktop-file-utils (0.22-1ubuntu5.1) ...
Processing triggers for mime-support (3.59ubuntu1) ...
Processing triggers for hicolor-icon-theme (0.15-0ubuntu1) ...
Processing triggers for man-db (2.7.5-1) ...
Errors were encountered while processing:
 anydesk

sudo apt-get install libgtkglext1
Reading package lists... Done
Building dependency tree       
Reading state information... Done
You might want to run 'apt-get -f install' to correct these:
The following packages have unmet dependencies:
 anydesk : Depends: libpango1.0-0 but it is not going to be installed
 libgtkglext1 : Depends: libglu1-mesa but it is not going to be installed or
                         libglu1
                Depends: libpangox-1.0-0 (>= 0.0.2) but it is not going to be installed
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).
Je comprends pas!!
C'est bon!!
sudo apt-get -f install 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Correcting dependencies... Done
The following additional packages will be installed:
  libglu1-mesa libgtkglext1 libpango1.0-0 libpangox-1.0-0
The following NEW packages will be installed:
  libglu1-mesa libgtkglext1 libpango1.0-0 libpangox-1.0-0
0 upgraded, 4 newly installed, 0 to remove and 2 not upgraded.
1 not fully installed or removed.
Need to get 245 kB/290 kB of archives.
After this operation, 1 305 kB of additional disk space will be used.
Do you want to continue? [Y/n] 
Get:1 http://fr.archive.ubuntu.com/ubuntu xenial/main amd64 libglu1-mesa amd64 9.0.0-2.1 [168 kB]
Get:2 http://fr.archive.ubuntu.com/ubuntu xenial/universe amd64 libgtkglext1 amd64 1.2.0-3.2fakesync1ubuntu1 [76,8 kB]
Fetched 245 kB in 0s (2 977 kB/s)       
Selecting previously unselected package libglu1-mesa:amd64.
(Reading database ... 135234 files and directories currently installed.)
Preparing to unpack .../libglu1-mesa_9.0.0-2.1_amd64.deb ...
Unpacking libglu1-mesa:amd64 (9.0.0-2.1) ...
Selecting previously unselected package libpangox-1.0-0:amd64.
Preparing to unpack .../libpangox-1.0-0_0.0.2-5_amd64.deb ...
Unpacking libpangox-1.0-0:amd64 (0.0.2-5) ...
Selecting previously unselected package libgtkglext1:amd64.
Preparing to unpack .../libgtkglext1_1.2.0-3.2fakesync1ubuntu1_amd64.deb ...
Unpacking libgtkglext1:amd64 (1.2.0-3.2fakesync1ubuntu1) ...
Selecting previously unselected package libpango1.0-0:amd64.
Preparing to unpack .../libpango1.0-0_1.38.1-1_amd64.deb ...
Unpacking libpango1.0-0:amd64 (1.38.1-1) ...
Processing triggers for libc-bin (2.23-0ubuntu10) ...
Setting up libglu1-mesa:amd64 (9.0.0-2.1) ...
Setting up libpangox-1.0-0:amd64 (0.0.2-5) ...
Setting up libgtkglext1:amd64 (1.2.0-3.2fakesync1ubuntu1) ...
Setting up libpango1.0-0:amd64 (1.38.1-1) ...
Setting up anydesk (2.9.5-1) ...
Processing triggers for libc-bin (2.23-0ubuntu10) ...
Processing triggers for menu (2.1.47ubuntu1) ...
Merci nam1962 🙂
Du coup j'ai réussi à installer anydesk. Je le lance via ssh avec l'option X
j'arrive à associer le serveur et le client mais au moment ou l'ecran du serveur doit apparaître ca bloque sur le message en attente d'image.
Es ce que lxde est bien compatible avec anydesk?
Quelqu'un à une idée de pourquoi ca bloque ?
Euhh, comment le lances-tu ? Je le lance graphiquement comme je lancerai LibreOffice ou Firefox.. et toi ?
bah je n'ai qu'un acces ssh donc je le lance en ligne de commande une fois mettre connecté en ssh avec l'option X. (export du display) 
ssh -X root@ip

et après je lance la commande 
anydesk
la fenêtre d'anydesk apparaît,
je fais la synchronisation entre le serveur et le client. j'accepte l'invitation ca me note connected et juste en dessous c'est noté "waiting for image"
Vu que je ne m'authentifie pas graphiquement es ce que ca peut poser problème?
Il nous faut une bonne âme : je ne pratique pas du tout le lancement via SSH (sur un autre ordi, donc ?)
un truc marrant quand je suis connecté en ssh avec l'option export du display et que je lance la commande
startlxde
ca change mon fond d'écran par celui du serveur où lxde est installé, avec les dossiers, mais je ne peux pas les sélectionner.