Bonsoir comme son nom l'indique j'ai effacé le dossier etc/yum/repos.d/ !!!
Je voudrais savoir si il est possible d'arrangé tous sa!
J'ai commencé par faire:

# mkdir  etc/yum.repos.d/ 

ensuite j'ai voulu rajouté les depot rpm fusion

su -lc 'yum install --nogpgcheck http://download1.rpmfusion.org/free/fedora/rpmfusion-free-release-stable.noarch.rpm'

voici le message en retour:

Loaded plugins: langpacks, presto, refresh-packagekit
There are no enabled repos.
 Run "yum repolist all" to see the repos you have.
 You can enable repos with yum-config-manager --enable <repo>

donc je fais

 # yum-config-manager --enable

qui retour sa:

Modules complémentaires chargés : langpacks, presto, refresh-packagekit
Error: Trying to enable already enabled repos.
===================================== main =====================================
[main]
alwaysprompt = True
assumeno = False
assumeyes = False
bandwidth = 0
bugtracker_url = http://yum.baseurl.org/report
cache = 0
cachedir = /var/cache/yum/x86_64/16
clean_requirements_on_remove = False
color = auto
color_list_available_downgrade = dim,cyan
color_list_available_install = normal
color_list_available_reinstall = bold,underline,green
color_list_available_upgrade = bold,blue
color_list_installed_extra = bold,red
color_list_installed_newer = bold,yellow
color_list_installed_older = bold
color_list_installed_reinstall = normal
color_search_match = bold
color_update_installed = normal
color_update_local = bold
color_update_remote = normal
commands = 
debuglevel = 2
diskspacecheck = True
distroverpkg = redhat-release
enable_group_conditionals = True
enabled = True
enablegroups = True
errorlevel = 2
exactarch = True
exactarchlist = 
exclude = 
exit_on_lock = False
failovermethod = priority
gaftonmode = False
gpgcheck = True
group_package_types = mandatory,
   default
groupremove_leaf_only = False
history_list_view = single-user-commands
history_record = True
history_record_packages = yum,
   rpm
http_caching = all
installonly_limit = 3
installonlypkgs = kernel,
   kernel-bigmem,
   kernel-enterprise,
   kernel-smp,
   kernel-modules,
   kernel-debug,
   kernel-unsupported,
   kernel-source,
   kernel-devel,
   kernel-PAE,
   kernel-PAE-debug
installroot = /
keepalive = True
keepcache = False
kernelpkgnames = kernel,
   kernel-smp,
   kernel-enterprise,
   kernel-bigmem,
   kernel-BOOT,
   kernel-PAE,
   kernel-PAE-debug
loadts_ignoremissing = False
loadts_ignorerpm = False
localpkg_gpgcheck = False
logfile = /var/log/yum.log
mdpolicy = group:primary
metadata_expire = 21600
mirrorlist_expire = 86400
multilib_policy = best
obsoletes = True
overwrite_groups = False
password = 
persistdir = /var/lib/yum
pluginconfpath = /etc/yum/pluginconf.d
pluginpath = /usr/share/yum-plugins,
   /usr/lib/yum-plugins
plugins = True
progess_obj = 
protected_multilib = True
protected_packages = yum
proxy = 
proxy_password = 
proxy_username = 
recent = 7
repo_gpgcheck = False
reposdir = /etc/yum/repos.d,
   /etc/yum.repos.d
retries = 10
rpm_check_debug = True
rpmverbosity = info
showdupesfromrepos = False
skip_broken = False
sslcacert = 
sslclientcert = 
sslclientkey = 
sslverify = True
syslog_device = /dev/log
syslog_facility = LOG_USER
syslog_ident = 
throttle = 0
timeout = 30.0
tolerant = True
tsflags = 
username = 

mais je viens de voir que je dois passé un argument a la commande

 yum-manager --enable <repo>

je passe un argument à la commande

yum-manager --enable --nogpgcheck http://download1.rpmfusion.org/nonfree/fedora/rpmfusion-nonfree-release-stable.noarch.rpm

retour:

Modules complémentaires chargés : langpacks, presto, refresh-packagekit

ensuite

# yum repolist all
Modules complémentaires chargés : langpacks, presto, refresh-packagekit
Aucune commande telle que : replist. Veuillez utiliser /usr/bin/yum --help

Que faire ???

config:
fedora 16 x86_64

depot avant effacement:
ceux de base + fusion + adobe + virtualbox

Merci d'avance à ceux qui m'aideront ou me conseillerons !!