mint@mint-Box:~$ sudo apt-get install chromium-browser
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following package was automatically installed and is no longer required:
libllvm10
Use 'sudo apt autoremove' to remove it.
The following additional packages will be installed:
chromium libgl1-mesa-glx
The following NEW packages will be installed:
chromium chromium-browser libgl1-mesa-glx
0 upgraded, 3 newly installed, 0 to remove and 2 not upgraded.
Need to get 76.5 MB of archives.
After this operation, 229 MB of additional disk space will be used.
Do you want to continue? [Y/n] Y
Get:1 Index of /ubuntu focal-updates/main amd64 libgl1-mesa-glx amd64 20.2.6-0ubuntu0.20.04.1 [5,540 B]
Err:2 Repository - Linux Mint ulyana/upstream amd64 chromium amd64 88.0.4324.96~linuxmint2+ulyssa
404 Not Found [IP: 68.235.39.11 80]
Get:3 Repository - Linux Mint ulyana/upstream amd64 chromium-browser all 2020.10.27 [1,264 B]
Fetched 6,804 B in 3s (2,023 B/s)
E: Failed to fetch *packages.linuxmint.com/pool/upstream/c/chromium/chromium_88.0.4324.96~linuxmint2+ulyssa_amd64.deb 404 Not Found [IP: 68.235.39.11 80]
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?