I am trying to install Ruby for the purposes of using Jekyl for static site generation.
I'm following the instaructions at https://www.ruby-lang.org/en/documentation/installation/
and found an immediate issue:
$ sudo apt-get install ruby-full
Reading package lists... DoneBuilding dependency treeReading state information... DoneThe following additional packages will be installed: fonts-lato javascript-common libgmp-dev libgmpxx4ldbl libjs-jquery libruby2.7 rake ri ruby ruby-dev ruby-minitest ruby-net-telnet ruby-power-assert ruby-test-unit ruby-xmlrpc ruby2.7 ruby2.7-dev ruby2.7-doc rubygems-integration unzip zipSuggested packages: apache2 | lighttpd | httpd gmp-doc libgmp10-doc libmpfr-dev bundlerThe following NEW packages will be installed: fonts-lato javascript-common libgmp-dev libgmpxx4ldbl libjs-jquery libruby2.7 rake ri ruby ruby-dev ruby-full ruby-minitest ruby-net-telnet ruby-power-assert ruby-test-unit ruby-xmlrpc ruby2.7 ruby2.7-dev ruby2.7-doc rubygems-integration unzip zip0 upgraded, 22 newly installed, 0 to remove and 123 not upgraded.Need to get 9907 kB of archives.After this operation, 58.8 MB of additional disk space will be used.Do you want to continue? [Y/n] yGet:1 http://archive.ubuntu.com/ubuntu focal/main amd64 fonts-lato all 2.0-2 [2698 kB]Get:2 http://archive.ubuntu.com/ubuntu focal/main amd64 javascript-common all 11 [6066 B]Get:3 http://archive.ubuntu.com/ubuntu focal/main amd64 libgmpxx4ldbl amd64 2:6.2.0+dfsg-4 [9128 B]Get:4 http://archive.ubuntu.com/ubuntu focal/main amd64 libgmp-dev amd64 2:6.2.0+dfsg-4 [320 kB]Get:5 http://archive.ubuntu.com/ubuntu focal/main amd64 libjs-jquery all 3.3.1~dfsg-3 [329 kB]Get:6 http://archive.ubuntu.com/ubuntu focal/main amd64 rubygems-integration all 1.16 [5092 B]Err:7 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 ruby2.7 amd64 2.7.0-5ubuntu1.1 404 Not Found [IP: 2001:67c:1360:8001::23 80]Get:8 http://archive.ubuntu.com/ubuntu focal/main amd64 ruby amd64 1:2.7+1 [5412 B]Get:9 http://archive.ubuntu.com/ubuntu focal/main amd64 rake all 13.0.1-4 [61.6 kB]Get:10 http://archive.ubuntu.com/ubuntu focal/main amd64 ruby-minitest all 5.13.0-1 [40.9 kB]Get:11 http://archive.ubuntu.com/ubuntu focal/main amd64 ruby-net-telnet all 0.1.1-2 [12.6 kB]Get:12 http://archive.ubuntu.com/ubuntu focal/main amd64 ruby-power-assert all 1.1.7-1 [11.4 kB]Get:13 http://archive.ubuntu.com/ubuntu focal/main amd64 ruby-test-unit all 3.3.5-1 [73.2 kB]Get:14 http://archive.ubuntu.com/ubuntu focal/main amd64 ruby-xmlrpc all 0.3.0-2 [23.8 kB]Err:15 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 libruby2.7 amd64 2.7.0-5ubuntu1.1 404 Not Found [IP: 2001:67c:1360:8001::23 80]Err:16 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 ruby2.7-doc all 2.7.0-5ubuntu1.1 404 Not Found [IP: 2001:67c:1360:8001::23 80]Get:17 http://archive.ubuntu.com/ubuntu focal/universe amd64 ri all 1:2.7+1 [4520 B]Err:18 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 ruby2.7-dev amd64 2.7.0-5ubuntu1.1 404 Not Found [IP: 2001:67c:1360:8001::23 80]Get:19 http://archive.ubuntu.com/ubuntu focal/main amd64 ruby-dev amd64 1:2.7+1 [4632 B]Get:20 http://archive.ubuntu.com/ubuntu focal/universe amd64 ruby-full all 1:2.7+1 [2728 B]Get:21 http://archive.ubuntu.com/ubuntu focal/main amd64 unzip amd64 6.0-25ubuntu1 [169 kB]Get:22 http://archive.ubuntu.com/ubuntu focal/main amd64 zip amd64 3.0-11build1 [167 kB]Fetched 3944 kB in 2s (1968 kB/s)E: Failed to fetch http://archive.ubuntu.com/ubuntu/pool/main/r/ruby2.7/ruby2.7_2.7.0-5ubuntu1.1_amd64.deb 404 Not Found [IP: 2001:67c:1360:8001::23 80]E: Failed to fetch http://archive.ubuntu.com/ubuntu/pool/main/r/ruby2.7/libruby2.7_2.7.0-5ubuntu1.1_amd64.deb 404 Not Found [IP: 2001:67c:1360:8001::23 80]E: Failed to fetch http://archive.ubuntu.com/ubuntu/pool/main/r/ruby2.7/ruby2.7-doc_2.7.0-5ubuntu1.1_all.deb 404 Not Found [IP: 2001:67c:1360:8001::23 80]E: Failed to fetch http://archive.ubuntu.com/ubuntu/pool/main/r/ruby2.7/ruby2.7-dev_2.7.0-5ubuntu1.1_amd64.deb 404 Not Found [IP: 2001:67c:1360:8001::23 80]E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?I re-ran the command with the --fix-missing option, but this made no difference. What can I do to fix this?