diff --git a/input/grid5000/sites/grenoble/clusters/edel/edel.yaml b/input/grid5000/sites/grenoble/clusters/edel/edel.yaml
index 47bd25ea29993292fcf72086e8999fc90bf9e707..64b0767c7768667739ec12fb64ef5daf2f0117cb 100644
--- a/input/grid5000/sites/grenoble/clusters/edel/edel.yaml
+++ b/input/grid5000/sites/grenoble/clusters/edel/edel.yaml
@@ -44,11 +44,6 @@ nodes:
       queues:
         - default
         - admin
-    operating_system:
-      name: debian
-      release: Jessie
-      version: "8.2"
-      kernel: 3.16.0-4-amd64
     storage_devices:
       sda:
         interface: SATA
diff --git a/input/grid5000/sites/grenoble/clusters/genepi/genepi.yaml b/input/grid5000/sites/grenoble/clusters/genepi/genepi.yaml
index 98f84de98d107baf8642745df40ab561e1030298..5805d6d62f781447beb5a19abef509625123d8ae 100644
--- a/input/grid5000/sites/grenoble/clusters/genepi/genepi.yaml
+++ b/input/grid5000/sites/grenoble/clusters/genepi/genepi.yaml
@@ -23,11 +23,6 @@ nodes:
       queues:
         - default
         - admin
-    operating_system:
-      name: debian
-      release: Jessie
-      version: "8.2"
-      kernel: 3.16.0-4-amd64
     storage_devices:
       sda:
         interface: SATA
diff --git a/input/grid5000/sites/lille/clusters/chetemi/chetemi.yaml b/input/grid5000/sites/lille/clusters/chetemi/chetemi.yaml
index aff9607f04be9fd376116373261ee441b8a59e58..b3f0fba35bdaea992b21befe18149f80d50bd285 100644
--- a/input/grid5000/sites/lille/clusters/chetemi/chetemi.yaml
+++ b/input/grid5000/sites/lille/clusters/chetemi/chetemi.yaml
@@ -11,11 +11,6 @@ nodes:
 
 # Global node properties
   chetemi-[1-15]:
-    operating_system:
-      name: debian
-      release: Jessie
-      version: "8.2"
-      kernel: 3.16.0-4-amd64
     supported_job_types:
       deploy: true
       besteffort: true
diff --git a/input/grid5000/sites/lille/clusters/chifflet/chifflet.yaml b/input/grid5000/sites/lille/clusters/chifflet/chifflet.yaml
index cf33bb489250c408ddbdcdb5066ecdf4004d66ac..771a61b23def9b94f3c1238cd543d7a092314ef7 100644
--- a/input/grid5000/sites/lille/clusters/chifflet/chifflet.yaml
+++ b/input/grid5000/sites/lille/clusters/chifflet/chifflet.yaml
@@ -11,11 +11,6 @@ nodes:
 
 # Global node properties
   chifflet-[1-8]:
-    operating_system:
-      name: debian
-      release: Jessie
-      version: "8.2"
-      kernel: 3.16.0-4-amd64
     supported_job_types:
       deploy: true
       besteffort: true
diff --git a/input/grid5000/sites/luxembourg/clusters/granduc/granduc.yaml b/input/grid5000/sites/luxembourg/clusters/granduc/granduc.yaml
index 9bc9631ecf3625d4582917ab76e5bb7bb196caa5..26034bdaba3742330874673e36c2b5d23b2e6dd4 100644
--- a/input/grid5000/sites/luxembourg/clusters/granduc/granduc.yaml
+++ b/input/grid5000/sites/luxembourg/clusters/granduc/granduc.yaml
@@ -7,10 +7,6 @@ queues:
 
 nodes:
   granduc-[1-22]:
-    operating_system:
-      kernel: 3.16.0-4-amd64
-      name: debian
-      version: '8.2'
     processor:
       cache_l1d: 32768
       cache_l1i: 32768
diff --git a/input/grid5000/sites/luxembourg/clusters/petitprince/petitprince.yaml b/input/grid5000/sites/luxembourg/clusters/petitprince/petitprince.yaml
index 0ad4ffa315b4c1ae176fdbfa86afd6b868da577a..71a25ad4f15b95dc3ab2762206e913671f9ac646 100644
--- a/input/grid5000/sites/luxembourg/clusters/petitprince/petitprince.yaml
+++ b/input/grid5000/sites/luxembourg/clusters/petitprince/petitprince.yaml
@@ -7,10 +7,6 @@ queues:
 
 nodes:
   petitprince-[1-16]:
-    operating_system:
-      kernel: 3.16.0-4-amd64
-      name: debian
-      version: '8.2'
     chassis:
       manufacturer: Dell Inc.
       name: PowerEdge M620
diff --git a/input/grid5000/sites/lyon/clusters/hercule/hercule.yaml b/input/grid5000/sites/lyon/clusters/hercule/hercule.yaml
index 84455de916f38aaf8213f61eefb3f59f0d0827b1..30b07d47f75b5cf3e2fa8291bd9341ce215266a9 100644
--- a/input/grid5000/sites/lyon/clusters/hercule/hercule.yaml
+++ b/input/grid5000/sites/lyon/clusters/hercule/hercule.yaml
@@ -31,11 +31,6 @@ nodes:
       queues:
         - default
         - admin
-    operating_system:
-      name: debian
-      release: Jessie
-      version: "8.2"
-      kernel: 3.16.0-4-amd64
     storage_devices:
       sda:
         interface: SATA
diff --git a/input/grid5000/sites/lyon/clusters/orion/orion.yaml b/input/grid5000/sites/lyon/clusters/orion/orion.yaml
index 8b058bbcf693dc3014a90f078bb583f9505f62f5..86de878e7932c4cd2905fcec56db74b7535f4ec4 100644
--- a/input/grid5000/sites/lyon/clusters/orion/orion.yaml
+++ b/input/grid5000/sites/lyon/clusters/orion/orion.yaml
@@ -30,11 +30,6 @@ nodes:
         - default
         - admin
       max_walltime: 0
-    operating_system:
-      name: debian
-      release: Jessie
-      version: "8.2"
-      kernel: 3.16.0-4-amd64
     storage_devices:
       sda:
         interface: SCSI
diff --git a/input/grid5000/sites/lyon/clusters/sagittaire/sagittaire.yaml b/input/grid5000/sites/lyon/clusters/sagittaire/sagittaire.yaml
index 7200f1565bb0ffb5c0ae14ffc5f527ffffc2a9f3..09a7f6e248f99c57d0027b05ac37412424f546ba 100644
--- a/input/grid5000/sites/lyon/clusters/sagittaire/sagittaire.yaml
+++ b/input/grid5000/sites/lyon/clusters/sagittaire/sagittaire.yaml
@@ -43,11 +43,6 @@ nodes:
         - default
         - admin
       max_walltime: 0
-    operating_system:
-      name: debian
-      release: Jessie
-      version: "8.2"
-      kernel: 3.16.0-4-amd64
     storage_devices:
       sda:
         interface: SCSI
diff --git a/input/grid5000/sites/lyon/clusters/taurus/taurus.yaml b/input/grid5000/sites/lyon/clusters/taurus/taurus.yaml
index 314b0301f0902f6a1db7fcd8bfa9746318ebfc70..6fc143d50a5067593687002648c606006f3aecc5 100644
--- a/input/grid5000/sites/lyon/clusters/taurus/taurus.yaml
+++ b/input/grid5000/sites/lyon/clusters/taurus/taurus.yaml
@@ -10,10 +10,6 @@ nodes:
   taurus-[1-16]:
     chassis:
       name: PowerEdge R720
-    operating_system:
-      kernel: 3.16.0-4-amd64
-      name: debian
-      version: '8.2'
     processor:
       cache_l1d: 32768
       cache_l1i: 32768
diff --git a/input/grid5000/sites/nancy/clusters/graoully/graoully.yaml b/input/grid5000/sites/nancy/clusters/graoully/graoully.yaml
index 8e9c76d472d0e4daff19d2c082c120e275297f71..077f423be7c5f00ecb7a5bc166eab42de90c2173 100644
--- a/input/grid5000/sites/nancy/clusters/graoully/graoully.yaml
+++ b/input/grid5000/sites/nancy/clusters/graoully/graoully.yaml
@@ -10,11 +10,6 @@ queues:
 nodes:
 # Global node properties
   graoully-[1-16]:
-    operating_system:
-      kernel: 3.16.0-4-amd64
-      name: debian
-      release: Jessie
-      version: "8.2"
     processor:
       cache_l1d: 32768
       cache_l1i: 32768
diff --git a/input/grid5000/sites/nancy/clusters/graphene/graphene.yaml b/input/grid5000/sites/nancy/clusters/graphene/graphene.yaml
index b81c08e993f1d3a66b0b467c255c5c41bc55b827..221c7fff0702de379008b3cc36aabf00f66b95c3 100644
--- a/input/grid5000/sites/nancy/clusters/graphene/graphene.yaml
+++ b/input/grid5000/sites/nancy/clusters/graphene/graphene.yaml
@@ -13,11 +13,6 @@ nodes:
 
 # Global node properties
   graphene-[1-144]:
-    operating_system:
-      kernel: 3.16.0-4-amd64
-      name: debian
-      version: '8.2'
-      release: "Jessie"
     processor:
       cache_l1d: 32768
       cache_l1i: 32768
diff --git a/input/grid5000/sites/nancy/clusters/graphique/graphique.yaml b/input/grid5000/sites/nancy/clusters/graphique/graphique.yaml
index ff331aca7015a83cfd8bfe42cfb535b49dbb97ab..2c123a09f946eb6e1814022f82061762073970d7 100644
--- a/input/grid5000/sites/nancy/clusters/graphique/graphique.yaml
+++ b/input/grid5000/sites/nancy/clusters/graphique/graphique.yaml
@@ -32,11 +32,6 @@ nodes:
       vendor: Intel
       version: E5-2620 v3
       microarchitecture: Haswell
-    operating_system:
-      name: debian
-      release: Jessie
-      version: "8.2"
-      kernel: 3.16.0-4-amd64
     storage_devices:
       sda:
         interface: SCSI
diff --git a/input/grid5000/sites/nancy/clusters/graphite/graphite.yaml b/input/grid5000/sites/nancy/clusters/graphite/graphite.yaml
index 7d93a9c18c8fa296f38c1ca4bad8906905043cfc..b5f2b92ede08e93ae49cf48418b3f11bf4c48a20 100644
--- a/input/grid5000/sites/nancy/clusters/graphite/graphite.yaml
+++ b/input/grid5000/sites/nancy/clusters/graphite/graphite.yaml
@@ -14,11 +14,6 @@ nodes:
     performance:
       core_flops: 13.17e+9
       node_flops: 187.90e+9
-    operating_system:
-      kernel: 3.16.0-4-amd64
-      name: debian
-      release: Jessie
-      version: '8.2'
     processor:
       cache_l1d: 32768
       cache_l1i: 32768
diff --git a/input/grid5000/sites/nancy/clusters/grele/grele.yaml b/input/grid5000/sites/nancy/clusters/grele/grele.yaml
index 27e39a92d2dd314acb3d2865589250036e8c92e2..ba7115d891e1e25f4e2a9c9293e684dd592b3852 100644
--- a/input/grid5000/sites/nancy/clusters/grele/grele.yaml
+++ b/input/grid5000/sites/nancy/clusters/grele/grele.yaml
@@ -20,8 +20,6 @@ nodes:
     performance:
       core_flops: 15690000000
       node_flops: 398100000000
-    operating_system:
-      release: Jessie
     gpu:
       gpu: true
       gpu_count: 2
diff --git a/input/grid5000/sites/nancy/clusters/griffon/griffon.yaml b/input/grid5000/sites/nancy/clusters/griffon/griffon.yaml
index 11f275105c0609797e0775b88b60f370c6013d3e..4785b4e10f8d7891ab56666cf6606efe7237386f 100644
--- a/input/grid5000/sites/nancy/clusters/griffon/griffon.yaml
+++ b/input/grid5000/sites/nancy/clusters/griffon/griffon.yaml
@@ -15,11 +15,6 @@ nodes:
     performance:
       core_flops: 7963000000.0
       node_flops:  52500000000.0
-    operating_system:
-      kernel: 3.16.0-4-amd64
-      name: debian
-      version: '8.2'
-      release: Jessie
     processor:
       cache_l1d: 32768
       cache_l1i: 32768
diff --git a/input/grid5000/sites/nancy/clusters/grimani/grimani.yaml b/input/grid5000/sites/nancy/clusters/grimani/grimani.yaml
index 96f4a78cc7a343fb974139f97935749da6b8144f..ff76f2fd662ed3facf3e5506b5ad409cc94dcc6a 100644
--- a/input/grid5000/sites/nancy/clusters/grimani/grimani.yaml
+++ b/input/grid5000/sites/nancy/clusters/grimani/grimani.yaml
@@ -14,7 +14,6 @@ nodes:
      core_flops: 9760000000
      node_flops: 124300000000
     operating_system:
-      release: Jessie
       cstate_driver: intel_idle
       cstate_governor: menu
       cstate_max_id: 2
diff --git a/input/grid5000/sites/nancy/clusters/grimoire/grimoire.yaml b/input/grid5000/sites/nancy/clusters/grimoire/grimoire.yaml
index 0e7e4464c952c19ccb23dc0142b016488f48f633..8f347a1ccb6a1a3278a8a6b57aafc66e2e501c92 100644
--- a/input/grid5000/sites/nancy/clusters/grimoire/grimoire.yaml
+++ b/input/grid5000/sites/nancy/clusters/grimoire/grimoire.yaml
@@ -10,11 +10,6 @@ queues:
 nodes:
 # Global node properties
   grimoire-[1-8]:
-    operating_system:
-      release: Jessie
-      kernel: 3.16.0-4-amd64
-      name: debian
-      version: '8.2'
     processor:
       cache_l1d: 32768
       cache_l1i: 32768
diff --git a/input/grid5000/sites/nancy/clusters/grisou/grisou.yaml b/input/grid5000/sites/nancy/clusters/grisou/grisou.yaml
index 21b25ed5623b858aa36b4908d8cb5d46e0be599f..fd867e0ba13ebe301822a7b7fed7327eaa752e60 100644
--- a/input/grid5000/sites/nancy/clusters/grisou/grisou.yaml
+++ b/input/grid5000/sites/nancy/clusters/grisou/grisou.yaml
@@ -10,11 +10,6 @@ queues:
 nodes:
 # Global node properties
   grisou-[1-51]:
-    operating_system:
-      kernel: 3.16.0-4-amd64
-      name: debian
-      version: '8.2'
-      release: Jessie
     processor:
       cache_l1d: 32768
       cache_l1i: 32768
diff --git a/input/grid5000/sites/nancy/clusters/talc/talc.yaml b/input/grid5000/sites/nancy/clusters/talc/talc.yaml
index 3df758b963cc74296fa339d9e4999b85cf740779..302fe32ced059c1afd1b2c615bec93709f7f495f 100644
--- a/input/grid5000/sites/nancy/clusters/talc/talc.yaml
+++ b/input/grid5000/sites/nancy/clusters/talc/talc.yaml
@@ -14,11 +14,6 @@ nodes:
   talc-[1-134]:
     chassis:
       serial:
-    operating_system:
-      kernel: 3.16.0-4-amd64
-      name: debian
-      version: '8.2'
-      release: Jessie
     processor:
       cache_l1d: 32768
       cache_l1i: 32768
diff --git a/input/grid5000/sites/nantes/clusters/econome/econome.yaml b/input/grid5000/sites/nantes/clusters/econome/econome.yaml
index 16ea897854e5468429f642f799635c08644cd296..88c067c284300c6b63dccfaea04cb2269f980e83 100644
--- a/input/grid5000/sites/nantes/clusters/econome/econome.yaml
+++ b/input/grid5000/sites/nantes/clusters/econome/econome.yaml
@@ -30,11 +30,6 @@ nodes:
       queues:
         - default
         - admin
-    operating_system:
-      name: debian
-      release: Jessie
-      version: "8.2"
-      kernel: 3.16.0-4-amd64
     storage_devices:
       sda:
         interface: SATA
diff --git a/input/grid5000/sites/rennes/clusters/paranoia/paranoia.yaml b/input/grid5000/sites/rennes/clusters/paranoia/paranoia.yaml
index aa4dc8f6b3b744a8f43086c4b099ebabf6e21c8c..0c6b4b4dbacbfa790215aa0f483dab75e2499b0f 100644
--- a/input/grid5000/sites/rennes/clusters/paranoia/paranoia.yaml
+++ b/input/grid5000/sites/rennes/clusters/paranoia/paranoia.yaml
@@ -30,11 +30,6 @@ nodes:
         - default
         - admin
       max_walltime: 0
-    operating_system:
-      name: debian
-      release: Jessie
-      version: "8.2"
-      kernel: 3.16.0-4-amd64
     storage_devices:
       sda:
         interface: SATA
diff --git a/input/grid5000/sites/rennes/clusters/parapide/parapide.yaml b/input/grid5000/sites/rennes/clusters/parapide/parapide.yaml
index a7b2d15cdee936afa9eb21add8441afe10f3603b..e46f46e65ee01afe6d5e1f5cd7e2b8346045bd96 100644
--- a/input/grid5000/sites/rennes/clusters/parapide/parapide.yaml
+++ b/input/grid5000/sites/rennes/clusters/parapide/parapide.yaml
@@ -46,11 +46,6 @@ nodes:
       queues:
         - default
         -  admin
-    operating_system:
-      name: debian
-      release: Jessie
-      version: "8.2"
-      kernel: 3.16.0-4-amd64
     storage_devices:
       sda:
         interface: SATA
diff --git a/input/grid5000/sites/rennes/clusters/parapluie/parapluie.yaml b/input/grid5000/sites/rennes/clusters/parapluie/parapluie.yaml
index 8f11dc9fa3c65dc30d8f4fffede4ee14e1958f6c..0522bf7f6ab68b8406f8d8379563a9953174a06b 100644
--- a/input/grid5000/sites/rennes/clusters/parapluie/parapluie.yaml
+++ b/input/grid5000/sites/rennes/clusters/parapluie/parapluie.yaml
@@ -30,11 +30,6 @@ nodes:
       queues:
         - default
         - admin
-    operating_system:
-      name: debian
-      release: Jessie
-      version: "8.2"
-      kernel: 3.16.0-4-amd64
     storage_devices:
       sda:
         interface: SATA
diff --git a/input/grid5000/sites/rennes/clusters/parasilo/parasilo.yaml b/input/grid5000/sites/rennes/clusters/parasilo/parasilo.yaml
index e131f230c481a3a4fa1895f71a0ca8b7af4956f2..da5dd7b5826597a0ee674377eba33078bee45d2b 100644
--- a/input/grid5000/sites/rennes/clusters/parasilo/parasilo.yaml
+++ b/input/grid5000/sites/rennes/clusters/parasilo/parasilo.yaml
@@ -33,11 +33,6 @@ nodes:
       queues:
         - default
         - admin
-    operating_system:
-      name: debian
-      release: Jessie
-      version: "8.2"
-      kernel: 3.16.0-4-amd64
     storage_devices:
       sda:
         vendor: SEAGATE
diff --git a/input/grid5000/sites/rennes/clusters/paravance/paravance.yaml b/input/grid5000/sites/rennes/clusters/paravance/paravance.yaml
index e35c5dadba8adb72388e1a2a250b197465b1168d..9ec5ceb952eb3ff94bc4ae228b9a9e16cc9494f4 100644
--- a/input/grid5000/sites/rennes/clusters/paravance/paravance.yaml
+++ b/input/grid5000/sites/rennes/clusters/paravance/paravance.yaml
@@ -33,11 +33,6 @@ nodes:
       queues:
         - default
         - admin
-    operating_system:
-      name: debian
-      release: Jessie
-      version: "8.2"
-      kernel: 3.16.0-4-amd64
     storage_devices:
       sda:
         interface: SATA
diff --git a/input/grid5000/sites/sophia/clusters/sol/sol.yaml b/input/grid5000/sites/sophia/clusters/sol/sol.yaml
index 231a1db725eb8e8a951bff731628de961f03a700..6217e8c8e62233bdc72a955ab4ed02e7a3db51d5 100644
--- a/input/grid5000/sites/sophia/clusters/sol/sol.yaml
+++ b/input/grid5000/sites/sophia/clusters/sol/sol.yaml
@@ -29,11 +29,6 @@ nodes:
         - default
         - admin
       max_walltime: 0
-    operating_system:
-      name: debian
-      release: Jessie
-      version: "8.2"
-      kernel: 3.16.0-4-amd64
     storage_devices:
       sda:
         interface: SATA
diff --git a/input/grid5000/sites/sophia/clusters/suno/suno.yaml b/input/grid5000/sites/sophia/clusters/suno/suno.yaml
index 16739ed0f97e478984335b0be7e68d510cee3261..a324a91b6f80da2432f71cc5c64a139d589421f0 100644
--- a/input/grid5000/sites/sophia/clusters/suno/suno.yaml
+++ b/input/grid5000/sites/sophia/clusters/suno/suno.yaml
@@ -8,10 +8,6 @@ queues:
 
 nodes:
   suno-[1-45]:
-    operating_system:
-      kernel: 3.16.0-4-amd64
-      name: debian
-      version: '8.2'
     processor:
       cache_l1d: 32768
       cache_l1i: 32768
diff --git a/input/grid5000/sites/sophia/clusters/uva/uva.yaml b/input/grid5000/sites/sophia/clusters/uva/uva.yaml
index f92142ee591f3971440597d8e87257ce36eeea46..31d9259af90e7b69818d222cca9a538f9a66a411 100644
--- a/input/grid5000/sites/sophia/clusters/uva/uva.yaml
+++ b/input/grid5000/sites/sophia/clusters/uva/uva.yaml
@@ -30,11 +30,6 @@ nodes:
         - default
         - admin
       max_walltime: 0
-    operating_system:
-      name: debian
-      release: Jessie
-      version: "8.5"
-      kernel: 3.16.0-4-amd64
     gpu:
       gpu: false
     monitoring:
diff --git a/input/grid5000/sites/sophia/clusters/uvb/uvb.yaml b/input/grid5000/sites/sophia/clusters/uvb/uvb.yaml
index 8a9962175a926aa8d800427e6f4c139635514aac..f33f5442997cf4f3db110bcb4f626ee633e10431 100644
--- a/input/grid5000/sites/sophia/clusters/uvb/uvb.yaml
+++ b/input/grid5000/sites/sophia/clusters/uvb/uvb.yaml
@@ -30,11 +30,6 @@ nodes:
         - default
         - admin
       max_walltime: 0
-    operating_system:
-      name: debian
-      release: Jessie
-      version: "8.5"
-      kernel: 3.16.0-4-amd64
     gpu:
       gpu: false
     monitoring: