我正在尝试使用命令安装 git 和 gitolite sudo apt-get -y install git gitolite。它给了我以下输出：
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package gitolite 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 'gitolite' has no installation candidate
我尝试更新 apt-get，但这没有任何作用。有谁知道我该如何解决这个问题？