Reading package lists... Done
W: There is no public key available for the following key IDs:
4D270D06F42584E6
W: You may want to run apt-get update to correct these problems

the way :

# gpg --recv-key --keyserver wwwkeys.eu.pgp.net 4D270D06F42584E6
# gpg --export 4D270D06F42584E6 | apt-key add -

# gpg --recv-key --keyserver wwwkeys.eu.pgp.net 394D199524C52AC3
# gpg --export 394D199524C52AC3 | apt-key add -

# gpg --recv-key --keyserver wwwkeys.eu.pgp.net 033431536A423791
# gpg --export 033431536A423791 | apt-key add -

#gpg --keyserver hkp://subkeys.pgp.net --recv-keys 5227BEBD68436DDF
#gpg --export --armor 5227BEBD68436DDF | apt-key add -

#gpg --keyserver pgpkeys.pca.dfn.de --recv-keys 9AA38DCD55BE302B
#gpg --export -a 9AA38DCD55BE302B | apt-key add -

#gpg --keyserver  wwwkeys.eu.pgp.net --recv-keys 40976EAF437D05B5
#gpg --export 437D05B5 | apt-key add -

aptitude update


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