diff --git a/roles/oracle-db-preinstall/files/z_oracle.sh b/roles/oracle-db-preinstall/files/z_oracle.sh
index 61e07a2..8698477 100644
--- a/roles/oracle-db-preinstall/files/z_oracle.sh
+++ b/roles/oracle-db-preinstall/files/z_oracle.sh
@@ -62,3 +62,11 @@ if [ $USER = "grid" ] || [ $USER = "oracle" ] || [ $USER = "root" ] ; then
     fi
 fi
 
+# Preventing Installation Errors Caused by Terminal Output Commands
+if [ -t 0 ]; then
+   stty intr ^C
+fi
+
+# append history immediatly
+shopt -s histappend
+PROMPT_COMMAND="history -a;$PROMPT_COMMAND"
diff --git a/roles/oracle-db-preinstall/tasks/os_configuration.yml b/roles/oracle-db-preinstall/tasks/os_configuration.yml
index 3461e1f..f0e93e7 100644
--- a/roles/oracle-db-preinstall/tasks/os_configuration.yml
+++ b/roles/oracle-db-preinstall/tasks/os_configuration.yml
@@ -13,6 +13,14 @@
     service: name=chronyd  state=started  enabled=yes
     ignore_errors: true
 
+  # ---------------------------------------------------
+  # Activation du nscd : Name Service Cache Daemon pour palier aux
+  # problèmes de perte de DNS
+  # ---------------------------------------------------
+  - name: activate nscd
+    service: name=nscd  state=started  enabled=yes
+    ignore_errors: true
+
   # --------------------------------------------------- 
   # configuration Linux : Selinux
   # ---------------------------------------------------
diff --git a/roles/oracle-db-preinstall/tasks/users_configuration.yml b/roles/oracle-db-preinstall/tasks/users_configuration.yml
index 5173a76..94eee52 100644
--- a/roles/oracle-db-preinstall/tasks/users_configuration.yml
+++ b/roles/oracle-db-preinstall/tasks/users_configuration.yml
@@ -28,8 +28,8 @@
       groups={{ item.othergroups }} uid={{ item.uid }} 
       generate_ssh_key=yes append=yes state=present update_password=on_create password={{ item.passwd }}
     with_items:
-    - { username: oracle, uid: 1001, primgroup: oinstall, othergroups: "dba,oper,backupdba,dgdba,kmdba,racdba", passwd: "$6$0xHoAXXF$K75HKb64Hcb/CEcr3YEj2LGERi/U2moJgsCK.ztGxLsKoaXc4UBiNZPL0hlxB5ng6GL.gyipfQOOXplzcdgvD0"}
-    - { username: grid, uid: 1002, primgroup: oinstall, othergroups: "dba,asmdba,asmoper,asmadmin,racdba", passwd: "$6$0xHoAXXF$K75HKb64Hcb/CEcr3YEj2LGERi/U2moJgsCK.ztGxLsKoaXc4UBiNZPL0hlxB5ng6GL.gyipfQOOXplzcdgvD0"}
+    - { username: oracle, uid: 1001, primgroup: oinstall, othergroups: "dba,asmdba,backupdba,dgdba,kmdba,racdba,oper", passwd: "$6$0xHoAXXF$K75HKb64Hcb/CEcr3YEj2LGERi/U2moJgsCK.ztGxLsKoaXc4UBiNZPL0hlxB5ng6GL.gyipfQOOXplzcdgvD0"}
+    - { username: grid, uid: 1002, primgroup: oinstall, othergroups: "dba,asmdba,backupdba,dgdba,kmdba,racdba,asmoper,asmadmin", passwd: "$6$0xHoAXXF$K75HKb64Hcb/CEcr3YEj2LGERi/U2moJgsCK.ztGxLsKoaXc4UBiNZPL0hlxB5ng6GL.gyipfQOOXplzcdgvD0"}
     ignore_errors: true
     when: full_configuration |bool
     tags: user
diff --git a/roles/oracle-db-preinstall/vars/RedHat_8.yml b/roles/oracle-db-preinstall/vars/RedHat_8.yml
index cf91beb..1646a4f 100644
--- a/roles/oracle-db-preinstall/vars/RedHat_8.yml
+++ b/roles/oracle-db-preinstall/vars/RedHat_8.yml
@@ -12,6 +12,7 @@
    - bind-utils
    - binutils
    - chrony
+   - compat-libcap1
    - elfutils-libelf
    - elfutils-libelf-devel
    - fontconfig-devel
@@ -27,9 +28,12 @@
    - keyutils
    - ksh
    - libaio
+   - libaio.i686
    - libaio-devel
+   - libaio-devel.i686
    - libdmx
    - libgcc
+   - libgcc.i686
    - libibverbs
    - libICE
    - libmaxminddb
@@ -37,8 +41,10 @@
    - libpkgconf
    - librdmacm
    - libSM
+   - libstdc++.i686
    - libstdc++
    - libstdc++-devel
+   - libstdc++-devel.i686
    - libverto-libevent
    - libX11
    - libX11-common
@@ -49,12 +55,14 @@
    - libxcrypt-devel
    - libXext
    - libXi
+   - libXi.i686
    - libXinerama
    - libXmu
    - libXrandr
    - libXrender
    - libXt
    - libXtst
+   - libXtst.i686
    - libXv
    - libXxf86dga
    - libXxf86misc
@@ -62,6 +70,7 @@
    - lm_sensors-libs
    - make
    - mlocate
+   - nscd
    - net-snmp
    - net-tools
    - nfs-utils