You may want to run apt-get update to correct these problemsとなるとき

我流解消方法

`Unknown Multi-Arch type 'no' for package ほげほげ`などと出てしまい、Warningが出てしまうときの対処。

### sources.list

```
root@ubuntu:/etc/apt# cat sources.list
deb http://ftp.iij.ad.jp/pub/linux/ubuntu/archive/ xenial main restricted
deb-src http://ftp.iij.ad.jp/pub/linux/ubuntu/archive/ xenial main restricted
deb http://ftp.iij.ad.jp/pub/linux/ubuntu/archive/ xenial-updates main restricted
deb-src http://ftp.iij.ad.jp/pub/linux/ubuntu/archive/ xenial-updates main restricted
deb http://ftp.iij.ad.jp/pub/linux/ubuntu/archive/ xenial universe
deb-src http://ftp.iij.ad.jp/pub/linux/ubuntu/archive/ xenial universe
deb http://ftp.iij.ad.jp/pub/linux/ubuntu/archive/ xenial-updates universe
deb-src http://ftp.iij.ad.jp/pub/linux/ubuntu/archive/ xenial-updates universe
deb http://ftp.iij.ad.jp/pub/linux/ubuntu/archive/ xenial-security main restricted
deb-src http://ftp.iij.ad.jp/pub/linux/ubuntu/archive/ xenial-security main restricted
deb http://ftp.iij.ad.jp/pub/linux/ubuntu/archive/ xenial-security universe
deb-src http://ftp.iij.ad.jp/pub/linux/ubuntu/archive/ xenial-security universe
```

### apt updateしたときのログ
```
root@ubuntu:/etc/apt# apt update
Hit http://ftp.iij.ad.jp xenial InRelease
Hit http://ftp.iij.ad.jp xenial-updates InRelease
Hit http://ftp.iij.ad.jp xenial-security InRelease
Hit http://ftp.iij.ad.jp xenial/main Sources
Hit http://ftp.iij.ad.jp xenial/restricted Sources
Hit http://ftp.iij.ad.jp xenial/universe Sources
Hit http://ftp.iij.ad.jp xenial/main amd64 Packages
Hit http://archive.ubuntu.com xenial InRelease
Hit http://ftp.iij.ad.jp xenial/restricted amd64 Packages
Hit http://ftp.iij.ad.jp xenial/main i386 Packages
Hit http://archive.ubuntu.com xenial-updates InRelease
Hit http://ftp.iij.ad.jp xenial/restricted i386 Packages
Hit http://ftp.iij.ad.jp xenial/main Translation-en
Hit http://ftp.iij.ad.jp xenial/restricted Translation-en
Hit http://ftp.iij.ad.jp xenial-updates/main Sources
Hit http://archive.ubuntu.com xenial-security InRelease
Hit http://ftp.iij.ad.jp xenial-updates/restricted Sources
Hit http://ftp.iij.ad.jp xenial-updates/universe Sources
Hit http://ftp.iij.ad.jp xenial-updates/main amd64 Packages
Hit http://ftp.iij.ad.jp xenial-updates/restricted amd64 Packages
Hit http://ftp.iij.ad.jp xenial-updates/main i386 Packages
Hit http://ftp.iij.ad.jp xenial-updates/restricted i386 Packages
Hit http://ftp.iij.ad.jp xenial-updates/main Translation-en
Hit http://ftp.iij.ad.jp xenial-updates/restricted Translation-en
Hit http://archive.ubuntu.com xenial/main amd64 Packages
Hit http://ftp.iij.ad.jp xenial-security/main Sources
Hit http://ftp.iij.ad.jp xenial-security/restricted Sources
Hit http://ftp.iij.ad.jp xenial-security/universe Sources
Hit http://archive.ubuntu.com xenial/universe amd64 Packages
Hit http://ftp.iij.ad.jp xenial-security/universe amd64 Packages
Hit http://ftp.iij.ad.jp xenial-security/universe i386 Packages
Hit http://ftp.iij.ad.jp xenial-security/universe Translation-en
Hit http://archive.ubuntu.com xenial/main i386 Packages
Hit http://archive.ubuntu.com xenial/universe i386 Packages
Hit http://archive.ubuntu.com xenial/main Translation-en
Hit http://archive.ubuntu.com xenial/universe Translation-en
Hit http://archive.ubuntu.com xenial-updates/main amd64 Packages
Hit http://archive.ubuntu.com xenial-updates/universe amd64 Packages
Hit http://archive.ubuntu.com xenial-updates/main i386 Packages
Hit http://archive.ubuntu.com xenial-updates/universe i386 Packages
Hit http://archive.ubuntu.com xenial-updates/main Translation-en
Hit http://archive.ubuntu.com xenial-updates/universe Translation-en
Hit http://archive.ubuntu.com xenial-security/main amd64 Packages
Hit http://archive.ubuntu.com xenial-security/universe amd64 Packages
Hit http://archive.ubuntu.com xenial-security/main i386 Packages
Hit http://archive.ubuntu.com xenial-security/universe i386 Packages
Hit http://archive.ubuntu.com xenial-security/main Translation-en
Hit http://archive.ubuntu.com xenial-security/universe Translation-en
Reading package lists... Done
W: Unknown Multi-Arch type 'no' for package 'compiz-core'
W: Unknown Multi-Arch type 'no' for package 'compiz-gnome'
W: Unknown Multi-Arch type 'no' for package 'libxapian-dev'
W: Ignoring Provides line with DepCompareOp for package python-cffi-backend-api-max
W: Ignoring Provides line with DepCompareOp for package python-cffi-backend-api-min
W: Ignoring Provides line with DepCompareOp for package python3-cffi-backend-api-max
W: Ignoring Provides line with DepCompareOp for package python3-cffi-backend-api-min
W: Unknown Multi-Arch type 'no' for package 'compiz-core'
W: Unknown Multi-Arch type 'no' for package 'compiz-gnome'
W: Unknown Multi-Arch type 'no' for package 'libxapian-dev'
W: Ignoring Provides line with DepCompareOp for package python-cffi-backend-api-max
W: Ignoring Provides line with DepCompareOp for package python-cffi-backend-api-min
W: Ignoring Provides line with DepCompareOp for package python3-cffi-backend-api-max
W: Ignoring Provides line with DepCompareOp for package python3-cffi-backend-api-min
W: Unknown Multi-Arch type 'no' for package 'compiz-core'
W: Unknown Multi-Arch type 'no' for package 'compiz-gnome'
W: Ignoring Provides line with DepCompareOp for package xserver-xorg
W: Unknown Multi-Arch type 'no' for package 'compiz-core'
W: Unknown Multi-Arch type 'no' for package 'compiz-gnome'
W: Ignoring Provides line with DepCompareOp for package xserver-xorg
W: Unknown Multi-Arch type 'no' for package 'kwin'
W: Unknown Multi-Arch type 'no' for package 'kwin-dev'
W: Unknown Multi-Arch type 'no' for package 'kwin-wayland'
W: Unknown Multi-Arch type 'no' for package 'kwin-x11'
W: Unknown Multi-Arch type 'no' for package 'libkf5sysguard-dev'
W: Ignoring Provides line with DepCompareOp for package php-psr-http-message-implementation
W: Ignoring Provides line with DepCompareOp for package php-psr-log-implementation
W: Ignoring Provides line with DepCompareOp for package php-seclib
W: Ignoring Provides line with DepCompareOp for package php-sabre-http
W: Ignoring Provides line with DepCompareOp for package php-math-biginteger
W: Ignoring Provides line with DepCompareOp for package pypy-cffi
W: Ignoring Provides line with DepCompareOp for package pypy-cffi-backend-api-max
W: Ignoring Provides line with DepCompareOp for package pypy-cffi-backend-api-min
W: Unknown Multi-Arch type 'no' for package 'kwin-dev'
W: Unknown Multi-Arch type 'no' for package 'kwin-wayland'
W: Unknown Multi-Arch type 'no' for package 'kwin-x11'

▽
W: Unknown Multi-Arch type 'no' for package 'libkf5sysguard-dev'
W: Ignoring Provides line with DepCompareOp for package pypy-cffi
W: Ignoring Provides line with DepCompareOp for package pypy-cffi-backend-api-max
W: Ignoring Provides line with DepCompareOp for package pypy-cffi-backend-api-min
W: Ignoring Provides line with DepCompareOp for package php-math-biginteger
W: Ignoring Provides line with DepCompareOp for package pypy-cffi
W: Ignoring Provides line with DepCompareOp for package pypy-cffi-backend-api-max
W: Ignoring Provides line with DepCompareOp for package pypy-cffi-backend-api-min
W: Ignoring Provides line with DepCompareOp for package pypy-cffi
W: Ignoring Provides line with DepCompareOp for package pypy-cffi-backend-api-max
W: Ignoring Provides line with DepCompareOp for package pypy-cffi-backend-api-min
W: You may want to run apt-get update to correct these problems
```

よくある対処法
・参照先のリポジトリを変える。
・Aptのキャッシュをクリアする。
どっちをやってもだめでした。

色々ぐぐったらaptにもバグはあるらしい。
「アップグレードしてみ」って書いてあったのでダメ元で下記コマンドを実行。

`apt upgrade apt`
実行前 `apt 1.0.1ubuntu2 for amd64 compiled on Dec  8 2016 16:23:37`
↓
実行後 `apt 1.2.24 (amd64)`


```
root@ubuntu:/etc/apt# apt update
Hit:1 http://ftp.iij.ad.jp/pub/linux/ubuntu/archive xenial InRelease
Hit:2 http://ftp.iij.ad.jp/pub/linux/ubuntu/archive xenial-updates InRelease
Hit:3 http://ftp.iij.ad.jp/pub/linux/ubuntu/archive xenial-security InRelease
Reading package lists... Done
Building dependency tree
Reading state information... Done
61 packages can be upgraded. Run 'apt list --upgradable' to see them.
root@ubuntu:/etc/apt#
```
無事解決された様子です。