我正在尝试安装区域提醒器在 ubuntu 16.04 服务器上，我收到此未满足依赖关系错误。我该如何纠正此问题？
root@tpadzm:/home/joey# apt-get install zoneminder
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
zoneminder : Depends: libavcodec57 (>= 7:3.4.2) but it is not installable or
libavcodec-extra57 (>= 7:3.4.2) but it is not installable
Depends: libavformat57 (>= 7:3.4.2) but it is not installable
Depends: libavresample3 (>= 7:3.4.2) but it is not installable
Depends: libavutil55 (>= 7:3.4.2) but it is not installable
Depends: libmp4v2-2 but it is not installable
Depends: libswscale4 (>= 7:3.4.2) but it is not installable
Depends: libvlc5 (>= 1.1.1) but it is not installable
Depends: libx264-152 but it is not installable
Depends: libjs-mootools (>= 1.4.5~debian1) but it is not
installable
Depends: ffmpeg but it is not installable or
libav-tools but it is not installable
Depends: libdbd-mysql-perl but it is not installable
Depends: libphp-serialization-perl but it is not installable
Depends: libnet-sftp-foreign-perl but it is not installable
Depends: libdevice-serialport-perl but it is not installable
Depends: libimage-info-perl but it is not installable
Depends: libjson-any-perl but it is not installable
Depends: libsys-mmap-perl but it is not installable
Depends: liburi-encode-perl but it is not installable
Depends: libclass-std-fast-perl but it is not installable
Depends: libsoap-wsdl-perl but it is not installable
Depends: libio-socket-multicast-perl but it is not installable
Depends: libsys-cpu-perl but it is not installable
Depends: libsys-meminfo-perl but it is not installable
Depends: libdata-uuid-perl but it is not installable
Depends: libnumber-bytes-human-perl but it is not installable
Depends: libfile-slurp-perl but it is not installable
Depends: php5-apcu but it is not installable or
php-apcu but it is not installable
Depends: php-apc but it is not installable or
php-apcu-bc but it is not installable
Recommends: zoneminder-doc (>= 1.31.45~20180731103016-bionic) but
it is not going to be installed
Recommends: ffmpeg but it is not installable
E: Unable to correct problems, you have held broken packages.
root@tpadzm:/home/joey# apt install libavcodec57
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package libavcodec57 is not available, but is referred to by another
package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
E: Package 'libavcodec57' has no installation candidate
root@tpadzm:/home/joey# cat /etc/apt/sources.list
deb http://archive.ubuntu.com/ubuntu bionic main
deb http://archive.ubuntu.com/ubuntu bionic-security main
deb http://archive.ubuntu.com/ubuntu bionic-updates main
root@tpadzm:/home/joey#
答案1
好的，首先你错了sources.list，只包括主频道。所以，照做sudo gedit /etc/apt/sources.list，让它看起来像这样：
deb http://archive.ubuntu.com/ubuntu bionic main multiverse restricted universe
deb http://archive.ubuntu.com/ubuntu bionic-security main multiverse restricted universe
deb http://archive.ubuntu.com/ubuntu bionic-updates main multiverse restricted universe
保存并退出。然后更新你的存储库：
sudo apt update