Err:27 http://ubuntu.mirror.snu.edu.in/ubuntu cosmic/main amd64 fonts-font-awesome all 5.0.10+really4.7.0~dfsg-1
403 Forbidden [IP: 103.27.165.32 80]
Err:28 http://ubuntu.mirror.snu.edu.in/ubuntu cosmic/main amd64 libjs-underscore all 1.8.3~dfsg-1
403 Forbidden [IP: 103.27.165.32 80]
Err:29 http://ubuntu.mirror.snu.edu.in/ubuntu cosmic/universe amd64 libpgm-5.2-0 amd64 5.2.122~dfsg-2
403 Forbidden [IP: 103.27.165.32 80]
Err:30 http://ubuntu.mirror.snu.edu.in/ubuntu cosmic/universe amd64 python-scandir amd64 1.9.0-1
403 Forbidden [IP: 103.27.165.32 80]
E: Failed to fetch http://ubuntu.mirror.snu.edu.in/ubuntu/pool/universe/q/qtwebkit-opensource-src/libqt5webkit5_5.212.0~alpha2-12ubuntu1_amd64.deb 403 Forbidden [IP: 103.27.165.32 80]
E: Failed to fetch http://ubuntu.mirror.snu.edu.in/ubuntu/pool/universe/libp/libpgm/libpgm-5.2-0_5.2.122~dfsg-2_amd64.deb 403 Forbidden [IP: 103.27.165.32 80]
E: Failed to fetch http://ubuntu.mirror.snu.edu.in/ubuntu/pool/universe/p/python-scandir/python-scandir_1.9.0-1_amd64.deb 403 Forbidden [IP: 103.27.165.32 80]
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?
ubuntu@ubuntu:~$