sudo apt install emacs Reading package lists... Done Building dependency tree Reading state information... Done The following additional packages will be installed: emacs24 emacs24-bin-common emacs24-common emacs24-common-non-dfsg emacs24-el liblockfile-bin liblockfile1 libm17n-0 libotf0 m17n-db Suggested packages: ncurses-term m17n-docs gawk The following NEW packages will be installed emacs emacs24 emacs24-bin-common emacs24-common emacs24-common-non-dfsg emacs24-el liblockfile-bin liblockfile1 libm17n-0 libotf0 m17n-db 0 to upgrade, 11 to newly install, 0 to remove and 1 not to upgrade. Need to get 37.5 MB of archives. After this operation, 113 MB of additional disk space will be used. Do you want to continue? [Y/n] Y Err:1 https://archive.trisquel.info/trisquel flidas/main amd64 liblockfile-bin amd64 1.09-6ubuntu1 server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none Err:2 https://archive.trisquel.info/trisquel flidas/main amd64 liblockfile1 amd64 1.09-6ubuntu1 server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none Ign:3 https://archive.trisquel.info/trisquel flidas-updates/main i386 emacs24-common-non-dfsg all 24.4+1-2+8.0trisquel2 Ign:4 https://archive.trisquel.info/trisquel flidas-security/main i386 emacs24-common all 24.5+1-6ubuntu1.1 Ign:5 https://archive.trisquel.info/trisquel flidas-updates/main amd64 emacs24-bin-common amd64 24.5+1-6ubuntu1.1 Err:6 https://archive.trisquel.info/trisquel flidas/main amd64 libotf0 amd64 0.9.13-3 server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none Ign:7 https://archive.trisquel.info/trisquel flidas/main i386 m17n-db all 1.7.0-2 Err:8 https://archive.trisquel.info/trisquel flidas/main amd64 libm17n-0 amd64 1.7.0-3 server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none Ign:9 https://archive.trisquel.info/trisquel flidas-updates/main amd64 emacs24 amd64 24.5+1-6ubuntu1.1 Ign:10 https://archive.trisquel.info/trisquel flidas/main i386 emacs all 46.1 Ign:11 https://archive.trisquel.info/trisquel flidas-security/main i386 emacs24-el all 24.5+1-6ubuntu1.1 Err:3 https://archive.trisquel.info/trisquel flidas-updates/main i386 emacs24-common-non-dfsg all 24.4+1-2+8.0trisquel2 server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none Ign:4 https://archive.trisquel.info/trisquel flidas-updates/main amd64 emacs24-common all 24.5+1-6ubuntu1.1 Err:5 https://archive.trisquel.info/trisquel flidas-updates/main amd64 emacs24-bin-common amd64 24.5+1-6ubuntu1.1 server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none Err:7 https://archive.trisquel.info/trisquel flidas/main i386 m17n-db all 1.7.0-2 server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none Err:9 https://archive.trisquel.info/trisquel flidas-updates/main amd64 emacs24 amd64 24.5+1-6ubuntu1.1 server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none Err:10 https://archive.trisquel.info/trisquel flidas/main i386 emacs all 46.1 server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none Ign:11 https://archive.trisquel.info/trisquel flidas-updates/main amd64 emacs24-el all 24.5+1-6ubuntu1.1 Ign:4 https://archive.trisquel.info/trisquel flidas-updates/main i386 emacs24-common all 24.5+1-6ubuntu1.1 Ign:11 https://archive.trisquel.info/trisquel flidas-updates/main i386 emacs24-el all 24.5+1-6ubuntu1.1 Err:4 https://archive.trisquel.info/trisquel flidas-updates/main i386 emacs24-common all 24.5+1-6ubuntu1.1 server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none Err:11 https://archive.trisquel.info/trisquel flidas-updates/main i386 emacs24-el all 24.5+1-6ubuntu1.1 server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none E: Failed to fetch https://archive.trisquel.info/trisquel/pool/main/libl/liblockfile/liblockfile-bin_1.09-6ubuntu1_amd64.deb server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none E: Failed to fetch https://archive.trisquel.info/trisquel/pool/main/libl/liblockfile/liblockfile1_1.09-6ubuntu1_amd64.deb server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none E: Failed to fetch https://archive.trisquel.info/trisquel/pool/main/e/emacs24-non-dfsg/emacs24-common-non-dfsg_24.4+1-2+8.0trisquel2_all.deb server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none E: Failed to fetch https://archive.trisquel.info/trisquel/pool/main/e/emacs24/emacs24-common_24.5+1-6ubuntu1.1_all.deb server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none E: Failed to fetch https://archive.trisquel.info/trisquel/pool/main/e/emacs24/emacs24-bin-common_24.5+1-6ubuntu1.1_amd64.deb server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none E: Failed to fetch https://archive.trisquel.info/trisquel/pool/main/libo/libotf/libotf0_0.9.13-3_amd64.deb server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none E: Failed to fetch https://archive.trisquel.info/trisquel/pool/main/m/m17n-db/m17n-db_1.7.0-2_all.deb server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none E: Failed to fetch https://archive.trisquel.info/trisquel/pool/main/m/m17n-lib/libm17n-0_1.7.0-3_amd64.deb server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none E: Failed to fetch https://archive.trisquel.info/trisquel/pool/main/e/emacs24/emacs24_24.5+1-6ubuntu1.1_amd64.deb server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none E: Failed to fetch https://archive.trisquel.info/trisquel/pool/main/e/emacs-defaults/emacs_46.1_all.deb server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none E: Failed to fetch https://archive.trisquel.info/trisquel/pool/main/e/emacs24/emacs24-el_24.5+1-6ubuntu1.1_all.deb server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?