To be clear the message is just a warning:
Reading package lists... Done W: Duplicate sources.list entry http://ubuntu.osuosl.org/ubuntu/ precise-updates/main amd64 Packages (/var/lib/apt/lists/ubuntu.osuosl.org_ubuntu_dists_precise-updates_main_binary-amd64_Packages) W: Duplicate sources.list entry http://ubuntu.osuosl.org/ubuntu/ precise-updates/main i386 Packages (/var/lib/apt/lists/ubuntu.osuosl.org_ubuntu_dists_precise-updates_main_binary-i386_Packages) W: You may want to run apt-get update to correct these problems
To be clear the message is just a warning:
Reading package lists... Done ubuntu. osuosl. org/ubuntu/ precise- updates/ main amd64 Packages (/var/lib/ apt/lists/ ubuntu. osuosl. org_ubuntu_ dists_precise- updates_ main_binary- amd64_Packages) ubuntu. osuosl. org/ubuntu/ precise- updates/ main i386 Packages (/var/lib/ apt/lists/ ubuntu. osuosl. org_ubuntu_ dists_precise- updates_ main_binary- i386_Packages)
W: Duplicate sources.list entry http://
W: Duplicate sources.list entry http://
W: You may want to run apt-get update to correct these problems