“apt-get clean” 和 “apt-get clean all” 有何不同？

Question

如果有的话，此命令与以下命令有何区别：

sudo apt-get clean

还有这个命令：

sudo apt-get clean all

在我的 Lubuntu 12.04 系统上，模拟这些命令表明它们的行为完全相同：

ek@Apok:~$ apt-get -s clean
NOTE: This is only a simulation!
      apt-get needs root privileges for real execution.
      Keep also in mind that locking is deactivated,
      so don't depend on the relevance to the real current situation!
Del /var/cache/apt/archives/* /var/cache/apt/archives/partial/*
Del /var/cache/apt/pkgcache.bin /var/cache/apt/srcpkgcache.bin
ek@Apok:~$ apt-get -s clean all
NOTE: This is only a simulation!
      apt-get needs root privileges for real execution.
      Keep also in mind that locking is deactivated,
      so don't depend on the relevance to the real current situation!
Del /var/cache/apt/archives/* /var/cache/apt/archives/partial/*
Del /var/cache/apt/pkgcache.bin /var/cache/apt/srcpkgcache.bin
ek@Apok:~$

apt-get的行为与clean和的行为是否存在差异clean all？如果存在差异，那么差异是什么？在什么情况下是相关的？我应该如何在两者之间进行选择？如果没有差异，那么为什么存在clean all？

如果它们相同，那么clean all如果通常可以将包名称作为参数，则仍然有意义clean。但事实并非如此——尝试将包名称传递给clean不会改变clean的行为，整个缓存仍会被删除：

ek@Apok:~$ apt-get -s clean nano
NOTE: This is only a simulation!
      apt-get needs root privileges for real execution.
      Keep also in mind that locking is deactivated,
      so don't depend on the relevance to the real current situation!
Del /var/cache/apt/archives/* /var/cache/apt/archives/partial/*
Del /var/cache/apt/pkgcache.bin /var/cache/apt/srcpkgcache.bin

这让我想知道，也许clean all 没有确实存在（并且所发生的事情被all忽略了，就像nano上面的例子一样）。

clean all只是都市传说吗？

Answer 1

在

sudo apt-get clean all

all会被忽略，就像您在之后附加的其他内容一样clean。

例如

sudo apt-get clean my room