よくわからずにrootでbundle installしていた付けが回ってきた（今更

あと、更新スクリプトでbundle installしていないっぽいのもまずかったかも

ともかく、正月から録音が完全に止まっていたという大惨事になっていた。

$ bundle
 Fetching gem metadata from https://rubygems.org/……….
 Using rake 12.3.0
 Using concurrent-ruby 1.0.5
 Using i18n 0.9.1
 Using minitest 5.10.3
 Using thread_safe 0.3.6
 Using tzinfo 1.2.4
 Using activesupport 4.2.10
 Using builder 3.2.3
 Using erubis 2.7.0
 Using mini_portile2 2.3.0
 Using nokogiri 1.8.1
 Using rails-deprecated_sanitizer 1.0.3
 Using rails-dom-testing 1.0.8
 Using crass 1.0.3
 Using loofah 2.1.1
 Using rails-html-sanitizer 1.0.3
 Using actionview 4.2.10
 Using rack 1.6.8
 Using rack-test 0.6.3
 Using actionpack 4.2.10
 Using globalid 0.4.1
 Using activejob 4.2.10
 Using mini_mime 1.0.0
 Using mail 2.7.0
 Using actionmailer 4.2.10
 Using activemodel 4.2.10
 Using arel 6.0.4
 Using activerecord 4.2.10
 Using activerecord-import 0.21.0
 Using bundler 1.16.1
 Using chronic 0.10.2
 Using coderay 1.1.2
 Using coffee-script-source 1.12.2
 Using execjs 2.7.0
 Using coffee-script 2.4.1
 Using thor 0.20.0
 Using railties 4.2.10
 Using coffee-rails 4.0.1
 Using unf_ext 0.0.7.4
 Using unf 0.1.4
 Using domain_name 0.5.20170404
 Using hike 1.2.3
 Using http-cookie 1.0.3
 Using multi_xml 0.6.0
 Using httparty 0.15.6
 Using multi_json 1.12.2
 Using jbuilder 2.7.0
 Using jquery-rails 4.3.1
 Using json 1.8.6
 Fetching m3u8 0.8.2
 Bundler::GemspecError: Could not read gem at
 /var/lib/gems/2.1.0/cache/m3u8-0.8.2.gem. It may be corrupted.
 An error occurred while installing m3u8 (0.8.2), and Bundler cannot
 continue.
 Make sure that gem install m3u8 -v '0.8.2' succeeds before bundling.
 In Gemfile:
   m3u8

$ bundle --path vendor/bundle で解決した（参考）