我有一台 Ubuntu 手机（Aquaris E4.5）。我通过 ssh 连接到它。当我更新存储库时，控制台显示此错误。
phablet@ubuntu-phablet:/$ sudo apt-get update
[sudo] password for phablet:
Ign http://ppa.launchpad.net vivid InRelease
Ign http://ports.ubuntu.com vivid InRelease
Ign http://ppa.launchpad.net vivid Release.gpg
Ign http://ports.ubuntu.com vivid-updates InRelease
Ign http://ppa.launchpad.net vivid Release
Ign http://ports.ubuntu.com vivid-security InRelease
Ign http://ports.ubuntu.com vivid Release.gpg
Ign http://ports.ubuntu.com vivid-updates Release.gpg
Ign http://ports.ubuntu.com vivid-security Release.gpg
Ign http://ports.ubuntu.com vivid Release
Ign http://ports.ubuntu.com vivid-updates Release
Ign http://ports.ubuntu.com vivid-security Release
Err http://ppa.launchpad.net vivid/main Sources
404 Not Found
Err http://ppa.launchpad.net vivid/main armhf Packages
404 Not Found
Ign http://ppa.launchpad.net vivid/main Translation-es_ES
Ign http://ppa.launchpad.net vivid/main Translation-es
Ign http://ppa.launchpad.net vivid/main Translation-en
Err http://ports.ubuntu.com vivid/main Sources
404 Not Found [IP: 91.189.88.150 80]
Err http://ports.ubuntu.com vivid/restricted Sources
404 Not Found [IP: 91.189.88.150 80]
Err http://ports.ubuntu.com vivid/universe Sources
404 Not Found [IP: 91.189.88.150 80]
Err http://ports.ubuntu.com vivid/main armhf Packages
404 Not Found [IP: 91.189.88.150 80]
Err http://ports.ubuntu.com vivid/restricted armhf Packages
404 Not Found [IP: 91.189.88.150 80]
Err http://ports.ubuntu.com vivid/universe armhf Packages
404 Not Found [IP: 91.189.88.150 80]
Ign http://ports.ubuntu.com vivid/main Translation-es_ES
Ign http://ports.ubuntu.com vivid/main Translation-es
Ign http://ports.ubuntu.com vivid/main Translation-en
Ign http://ports.ubuntu.com vivid/restricted Translation-es_ES
Ign http://ports.ubuntu.com vivid/restricted Translation-es
Ign http://ports.ubuntu.com vivid/restricted Translation-en
Ign http://ports.ubuntu.com vivid/universe Translation-es_ES
Ign http://ports.ubuntu.com vivid/universe Translation-es
Ign http://ports.ubuntu.com vivid/universe Translation-en
Err http://ports.ubuntu.com vivid-updates/main Sources
404 Not Found [IP: 91.189.88.150 80]
Err http://ports.ubuntu.com vivid-updates/restricted Sources
404 Not Found [IP: 91.189.88.150 80]
Err http://ports.ubuntu.com vivid-updates/universe Sources
404 Not Found [IP: 91.189.88.150 80]
Err http://ports.ubuntu.com vivid-updates/main armhf Packages
404 Not Found [IP: 91.189.88.150 80]
Err http://ports.ubuntu.com vivid-updates/restricted armhf Packages
404 Not Found [IP: 91.189.88.150 80]
Err http://ports.ubuntu.com vivid-updates/universe armhf Packages
404 Not Found [IP: 91.189.88.150 80]
Ign http://ports.ubuntu.com vivid-updates/main Translation-es_ES
Ign http://ports.ubuntu.com vivid-updates/main Translation-es
Ign http://ports.ubuntu.com vivid-updates/main Translation-en
Ign http://ports.ubuntu.com vivid-updates/restricted Translation-es_ES
Ign http://ports.ubuntu.com vivid-updates/restricted Translation-es
Ign http://ports.ubuntu.com vivid-updates/restricted Translation-en
Ign http://ports.ubuntu.com vivid-updates/universe Translation-es_ES
Ign http://ports.ubuntu.com vivid-updates/universe Translation-es
Ign http://ports.ubuntu.com vivid-updates/universe Translation-en
Err http://ports.ubuntu.com vivid-security/main Sources
404 Not Found [IP: 91.189.88.150 80]
Err http://ports.ubuntu.com vivid-security/restricted Sources
404 Not Found [IP: 91.189.88.150 80]
Err http://ports.ubuntu.com vivid-security/universe Sources
404 Not Found [IP: 91.189.88.150 80]
Err http://ports.ubuntu.com vivid-security/main armhf Packages
404 Not Found [IP: 91.189.88.150 80]
Err http://ports.ubuntu.com vivid-security/restricted armhf Packages
404 Not Found [IP: 91.189.88.150 80]
Err http://ports.ubuntu.com vivid-security/universe armhf Packages
404 Not Found [IP: 91.189.88.150 80]
Ign http://ports.ubuntu.com vivid-security/main Translation-es_ES
Ign http://ports.ubuntu.com vivid-security/main Translation-es
Ign http://ports.ubuntu.com vivid-security/main Translation-en
Ign http://ports.ubuntu.com vivid-security/restricted Translation-es_ES
Ign http://ports.ubuntu.com vivid-security/restricted Translation-es
Ign http://ports.ubuntu.com vivid-security/restricted Translation-en
Ign http://ports.ubuntu.com vivid-security/universe Translation-es_ES
Ign http://ports.ubuntu.com vivid-security/universe Translation-es
Ign http://ports.ubuntu.com vivid-security/universe Translation-en
W: No se utilizan bloqueos para el fichero de bloqueo de sólo lectura /var/lib/apt/lists/lock
W: Fallo al obtener http://ppa.launchpad.net/ci-train-ppa-service/stable-snapshot/ubuntu/dists/vivid/main/source/Sources 404 Not Found
W: Fallo al obtener http://ppa.launchpad.net/ci-train-ppa-service/stable-snapshot/ubuntu/dists/vivid/main/binary-armhf/Packages 404 Not Found
W: Fallo al obtener http://ports.ubuntu.com/ubuntu-ports/dists/vivid/main/source/Sources 404 Not Found [IP: 91.189.88.150 80]
W: Fallo al obtener http://ports.ubuntu.com/ubuntu-ports/dists/vivid/restricted/source/Sources 404 Not Found [IP: 91.189.88.150 80]
W: Fallo al obtener http://ports.ubuntu.com/ubuntu-ports/dists/vivid/universe/source/Sources 404 Not Found [IP: 91.189.88.150 80]
W: Fallo al obtener http://ports.ubuntu.com/ubuntu-ports/dists/vivid/main/binary-armhf/Packages 404 Not Found [IP: 91.189.88.150 80]
W: Fallo al obtener http://ports.ubuntu.com/ubuntu-ports/dists/vivid/restricted/binary-armhf/Packages 404 Not Found [IP: 91.189.88.150 80]
W: Fallo al obtener http://ports.ubuntu.com/ubuntu-ports/dists/vivid/universe/binary-armhf/Packages 404 Not Found [IP: 91.189.88.150 80]
W: Fallo al obtener http://ports.ubuntu.com/ubuntu-ports/dists/vivid-updates/main/source/Sources 404 Not Found [IP: 91.189.88.150 80]
W: Fallo al obtener http://ports.ubuntu.com/ubuntu-ports/dists/vivid-updates/restricted/source/Sources 404 Not Found [IP: 91.189.88.150 80]
W: Fallo al obtener http://ports.ubuntu.com/ubuntu-ports/dists/vivid-updates/universe/source/Sources 404 Not Found [IP: 91.189.88.150 80]
W: Fallo al obtener http://ports.ubuntu.com/ubuntu-ports/dists/vivid-updates/main/binary-armhf/Packages 404 Not Found [IP: 91.189.88.150 80]
W: Fallo al obtener http://ports.ubuntu.com/ubuntu-ports/dists/vivid-updates/restricted/binary-armhf/Packages 404 Not Found [IP: 91.189.88.150 80]
W: Fallo al obtener http://ports.ubuntu.com/ubuntu-ports/dists/vivid-updates/universe/binary-armhf/Packages 404 Not Found [IP: 91.189.88.150 80]
W: Fallo al obtener http://ports.ubuntu.com/ubuntu-ports/dists/vivid-security/main/source/Sources 404 Not Found [IP: 91.189.88.150 80]
W: Fallo al obtener http://ports.ubuntu.com/ubuntu-ports/dists/vivid-security/restricted/source/Sources 404 Not Found [IP: 91.189.88.150 80]
W: Fallo al obtener http://ports.ubuntu.com/ubuntu-ports/dists/vivid-security/universe/source/Sources 404 Not Found [IP: 91.189.88.150 80]
W: Fallo al obtener http://ports.ubuntu.com/ubuntu-ports/dists/vivid-security/main/binary-armhf/Packages 404 Not Found [IP: 91.189.88.150 80]
W: Fallo al obtener http://ports.ubuntu.com/ubuntu-ports/dists/vivid-security/restricted/binary-armhf/Packages 404 Not Found [IP: 91.189.88.150 80]
W: Fallo al obtener http://ports.ubuntu.com/ubuntu-ports/dists/vivid-security/universe/binary-armhf/Packages 404 Not Found [IP: 91.189.88.150 80]
E: No se han podido descargar algunos archivos de índice, se han omitido, o se han utilizado unos antiguos en su lugar.
W: No se utilizan bloqueos para el fichero de bloqueo de sólo lectura /var/lib/dpkg/lock
pd：抱歉。我的英语很差 :-(
答案1
这很容易修复，您应该将根文件系统挂载为“读写”。
在终端应用程序中执行（当它要求输入密码时，尝试您的手机解锁代码）：
$ sudo su -
# mount -o remount,rw /
# apt-get update
... 更新后，将文件系统重新挂载为只读：
# mount -o remount,ro /