当我尝试libtiff在 64 位 Ubuntu 上安装时，出现以下错误：
sudo apt-get install libtiff
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package libtiff 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 'libtiff' has no installation candidate
ubuntu@ip-10-119-97-123:/mnt$ libtiff-memcached
libtiff-memcached: command not found