Hi, I tried the following command: wyey0755@wyey0755-ThinkPad-Edge:~$ sudo apt-key adv --recv-keys --keyserver hkp://pgp.mit.edu:80 2649A5A9 wyey0755@wyey0755-ThinkPad-Edge:~$ sudo apt-get update Hit http://cn.archive.ubuntu.com raring-updates Release.gpg Hit http://cn.archive.ubuntu.com raring-backports Release.gpg Hit http://cn.archive.ubuntu.com raring-updates Release Hit http://cn.archive.ubuntu.com raring-backports Release Hit http://cn.archive.ubuntu.com raring-updates/main i386 Packages Hit http://extras.ubuntu.com raring Release.gpg Hit http://cn.archive.ubuntu.com raring-updates/restricted i386 Packages Hit http://cn.archive.ubuntu.com raring-updates/main Translation-en Hit http://cn.archive.ubuntu.com raring-updates/restricted Translation-en Hit http://extras.ubuntu.com raring Release Hit http://cn.archive.ubuntu.com raring-backports/main i386 Packages Hit http://cn.archive.ubuntu.com raring-backports/restricted i386 Packages Hit http://cn.archive.ubuntu.com raring-backports/main Translation-en Hit http://security.ubuntu.com raring-security Release.gpg Hit http://extras.ubuntu.com raring/main Sources Hit http://cn.archive.ubuntu.com raring-backports/restricted Translation-en Hit http://security.ubuntu.com raring-security Release Hit http://extras.ubuntu.com raring/main i386 Packages Hit http://security.ubuntu.com raring-security/main i386 Packages Hit http://neurobot.bio.auth.gr data Release.gpg Hit http://security.ubuntu.com raring-security/restricted i386 Packages Hit http://neurobot.bio.auth.gr raring Release.gpg Ign http://cn.archive.ubuntu.com raring-updates/main Translation-en_US Ign http://cn.archive.ubuntu.com raring-updates/restricted Translation-en_US Ign http://cn.archive.ubuntu.com raring-backports/main Translation-en_US Ign http://cn.archive.ubuntu.com raring-backports/restricted Translation-en_US Hit http://security.ubuntu.com raring-security/main Translation-en Hit http://neurobot.bio.auth.gr data Release Hit http://neurobot.bio.auth.gr raring Release Hit http://security.ubuntu.com raring-security/restricted Translation-en Hit http://neurobot.bio.auth.gr data/main i386 Packages Ign http://extras.ubuntu.com raring/main Translation-en_US Ign http://extras.ubuntu.com raring/main Translation-en Hit http://neurobot.bio.auth.gr raring/main i386 Packages Ign http://security.ubuntu.com raring-security/main Translation-en_US Ign http://security.ubuntu.com raring-security/restricted Translation-en_US Ign http://neurobot.bio.auth.gr data/main Translation-en_US Ign http://neurobot.bio.auth.gr data/main Translation-en Ign http://neurobot.bio.auth.gr raring/main Translation-en_US Ign http://neurobot.bio.auth.gr raring/main Translation-en Reading package lists... Done wyey0755@wyey0755-ThinkPad-Edge:~$ sudo apt-get install fsl-complete Reading package lists... Done Building dependency tree Reading state information... Done E: Unable to locate package fsl-complete wyey0755@wyey0755-ThinkPad-Edge:~$ wyey0755@wyey0755-ThinkPad-Edge:~$ sudo apt-get clean wyey0755@wyey0755-ThinkPad-Edge:~$ sudo dpkg --configure -a wyey0755@wyey0755-ThinkPad-Edge:~$ sudo apt-get -f install Reading package lists... Done Building dependency tree Reading state information... Done 0 upgraded, 0 newly installed, 0 to remove and 329 not upgraded. wyey0755@wyey0755-ThinkPad-Edge:~$ sudo apt-get update Hit http://cn.archive.ubuntu.com raring-updates Release.gpg Hit http://cn.archive.ubuntu.com raring-backports Release.gpg Hit http://cn.archive.ubuntu.com raring-updates Release Hit http://cn.archive.ubuntu.com raring-backports Release Hit http://cn.archive.ubuntu.com raring-updates/main i386 Packages Hit http://cn.archive.ubuntu.com raring-updates/restricted i386 Packages Hit http://cn.archive.ubuntu.com raring-updates/main Translation-en Hit http://extras.ubuntu.com raring Release.gpg Hit http://cn.archive.ubuntu.com raring-updates/restricted Translation-en Hit http://cn.archive.ubuntu.com raring-backports/main i386 Packages Hit http://cn.archive.ubuntu.com raring-backports/restricted i386 Packages Hit http://neurobot.bio.auth.gr data Release.gpg Hit http://cn.archive.ubuntu.com raring-backports/main Translation-en Hit http://extras.ubuntu.com raring Release Hit http://cn.archive.ubuntu.com raring-backports/restricted Translation-en Hit http://security.ubuntu.com raring-security Release.gpg Hit http://neurobot.bio.auth.gr raring Release.gpg Hit http://extras.ubuntu.com raring/main Sources Hit http://security.ubuntu.com raring-security Release Hit http://extras.ubuntu.com raring/main i386 Packages Hit http://neurobot.bio.auth.gr data Release Hit http://security.ubuntu.com raring-security/main i386 Packages Ign http://cn.archive.ubuntu.com raring-updates/main Translation-en_US Ign http://cn.archive.ubuntu.com raring-updates/restricted Translation-en_US Ign http://cn.archive.ubuntu.com raring-backports/main Translation-en_US Hit http://neurobot.bio.auth.gr raring Release Ign http://cn.archive.ubuntu.com raring-backports/restricted Translation-en_US Hit http://security.ubuntu.com raring-security/restricted i386 Packages Hit http://neurobot.bio.auth.gr data/main i386 Packages Hit http://security.ubuntu.com raring-security/main Translation-en Hit http://neurobot.bio.auth.gr raring/main i386 Packages Hit http://security.ubuntu.com raring-security/restricted Translation-en Ign http://extras.ubuntu.com raring/main Translation-en_US Ign http://extras.ubuntu.com raring/main Translation-en Ign http://security.ubuntu.com raring-security/main Translation-en_US Ign http://security.ubuntu.com raring-security/restricted Translation-en_US Ign http://neurobot.bio.auth.gr data/main Translation-en_US Ign http://neurobot.bio.auth.gr data/main Translation-en Ign http://neurobot.bio.auth.gr raring/main Translation-en_US Ign http://neurobot.bio.auth.gr raring/main Translation-en Reading package lists... Done wyey0755@wyey0755-ThinkPad-Edge:~$ sudo apt-get install fsl-complete Reading package lists... Done Building dependency tree Reading state information... Done E: Unable to locate package fsl-complete wyey0755@wyey0755-ThinkPad-Edge:~$ Can i have your help again? Regards zhiyong At 2014-02-08 01:07:14,"Niels Bergsland" <[log in to unmask]> wrote: >Hi, >Do you get any errors from the following commands? > >sudo apt-get clean >sudo dpkg --configure -a >sudo apt-get -f install >sudo apt-get update