Re: [Trisquel-users] update error

[magicbanana]

Well, when it is written "A error occurred" (sic), you guess it is not  
normal. The error is rather well explained. The cryptographic key used to  
authenticate the Linux-libre repository is invalid. Try deleting this key and  
adding it again. The utility to do so is named apt-key. 'sudo apt-key list'  
will list those keys (including the problematic one). The keyid is the  
hexadecimal number after the slash. To remove the key of the Linux-libre  
repository, execute 'sudo apt-key del ' (replacing  with the keyid). Finally,  
to add the key: 'wget  
http://linux-libre.fsfla.org/pub/linux-libre/planet/archive-key.asc -O - |  
sudo apt-key add -'.

Of course, if you do not want the newer kernels, you can remove this  
repository instead! To do so, edit (with administrator's privileges)  
/etc/apt/sources.list and delete the line "deb  
http://linux-libre.fsfla.org/pub/linux-libre/planet planet main".