我有一个基于 Azure 的 Ubuntu 14.04 LTS 服务器，我运行了 purge-old-kernels (bikeshed)，它说只有 1 个内核可以删除。所以我让它删除了那个。
然后我检查了系统上的所有内核，我的 Ubuntu 14.04 LTS 列出了大约 28 个linux-image-x.x.x-generic文件、类似数量的文件linux-image-extra-x.x.x-generic和几个虚拟文件。
知道为什么这些其他的内核没有被删除吗？
删除这些其他内核是否安全？
dpkg --list | grep linux-image
rc linux-image-3.13.0-48-generic 3.13.0-48.80 amd64 Linux kernel image for version 3.13.0 on 64 bit x86 SMP
rc linux-image-3.13.0-49-generic 3.13.0-49.83 amd64 Linux kernel image for version 3.13.0 on 64 bit x86 SMP
rc linux-image-3.13.0-51-generic 3.13.0-51.84 amd64 Linux kernel image for version 3.13.0 on 64 bit x86 SMP
rc linux-image-3.13.0-52-generic 3.13.0-52.86 amd64 Linux kernel image for version 3.13.0 on 64 bit x86 SMP
rc linux-image-3.13.0-53-generic 3.13.0-53.89 amd64 Linux kernel image for version 3.13.0 on 64 bit x86 SMP
rc linux-image-3.13.0-54-generic 3.13.0-54.91 amd64 Linux kernel image for version 3.13.0 on 64 bit x86 SMP
rc linux-image-3.13.0-55-generic 3.13.0-55.94 amd64 Linux kernel image for version 3.13.0 on 64 bit x86 SMP
rc linux-image-3.13.0-57-generic 3.13.0-57.95 amd64 Linux kernel image for version 3.13.0 on 64 bit x86 SMP
rc linux-image-3.13.0-58-generic 3.13.0-58.97 amd64 Linux kernel image for version 3.13.0 on 64 bit x86 SMP
rc linux-image-3.13.0-59-generic 3.13.0-59.98 amd64 Linux kernel image for version 3.13.0 on 64 bit x86 SMP
rc linux-image-3.13.0-61-generic 3.13.0-61.100 amd64 Linux kernel image for version 3.13.0 on 64 bit x86 SMP
rc linux-image-3.13.0-62-generic 3.13.0-62.102 amd64 Linux kernel image for version 3.13.0 on 64 bit x86 SMP
rc linux-image-3.13.0-63-generic 3.13.0-63.103 amd64 Linux kernel image for version 3.13.0 on 64 bit x86 SMP
rc linux-image-3.13.0-65-generic 3.13.0-65.106 amd64 Linux kernel image for version 3.13.0 on 64 bit x86 SMP
rc linux-image-3.13.0-66-generic 3.13.0-66.108 amd64 Linux kernel image for version 3.13.0 on 64 bit x86 SMP
rc linux-image-3.13.0-67-generic 3.13.0-67.110 amd64 Linux kernel image for version 3.13.0 on 64 bit x86 SMP
rc linux-image-3.13.0-68-generic 3.13.0-68.111 amd64 Linux kernel image for version 3.13.0 on 64 bit x86 SMP
rc linux-image-3.13.0-71-generic 3.13.0-71.114 amd64 Linux kernel image for version 3.13.0 on 64 bit x86 SMP
rc linux-image-3.13.0-73-generic 3.13.0-73.116 amd64 Linux kernel image for version 3.13.0 on 64 bit x86 SMP
rc linux-image-3.13.0-74-generic 3.13.0-74.118 amd64 Linux kernel image for version 3.13.0 on 64 bit x86 SMP
rc linux-image-3.13.0-76-generic 3.13.0-76.120 amd64 Linux kernel image for version 3.13.0 on 64 bit x86 SMP
rc linux-image-3.13.0-77-generic 3.13.0-77.121 amd64 Linux kernel image for version 3.13.0 on 64 bit x86 SMP
rc linux-image-3.13.0-79-generic 3.13.0-79.123 amd64 Linux kernel image for version 3.13.0 on 64 bit x86 SMP
rc linux-image-3.13.0-83-generic 3.13.0-83.127 amd64 Linux kernel image for version 3.13.0 on 64 bit x86 SMP
rc linux-image-3.13.0-85-generic 3.13.0-85.129 amd64 Linux kernel image for version 3.13.0 on 64 bit x86 SMP
rc linux-image-3.13.0-86-generic 3.13.0-86.131 amd64 Linux kernel image for version 3.13.0 on 64 bit x86 SMP
rc linux-image-3.13.0-87-generic 3.13.0-87.133 amd64 Linux kernel image for version 3.13.0 on 64 bit x86 SMP
ii linux-image-3.13.0-88-generic 3.13.0-88.135 amd64 Linux kernel image for version 3.13.0 on 64 bit x86 SMP
ii linux-image-3.13.0-91-generic 3.13.0-91.138 amd64 Linux kernel image for version 3.13.0 on 64 bit x86 SMP
rc linux-image-3.2.0-77-virtual 3.2.0-77.112 amd64 Linux kernel image for version 3.2.0 on 64 bit x86 Virtual Guests
rc linux-image-extra-3.13.0-48-generic 3.13.0-48.80 amd64 Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
rc linux-image-extra-3.13.0-49-generic 3.13.0-49.83 amd64 Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
rc linux-image-extra-3.13.0-51-generic 3.13.0-51.84 amd64 Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
rc linux-image-extra-3.13.0-52-generic 3.13.0-52.86 amd64 Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
rc linux-image-extra-3.13.0-53-generic 3.13.0-53.89 amd64 Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
rc linux-image-extra-3.13.0-54-generic 3.13.0-54.91 amd64 Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
rc linux-image-extra-3.13.0-55-generic 3.13.0-55.94 amd64 Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
rc linux-image-extra-3.13.0-57-generic 3.13.0-57.95 amd64 Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
rc linux-image-extra-3.13.0-58-generic 3.13.0-58.97 amd64 Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
rc linux-image-extra-3.13.0-59-generic 3.13.0-59.98 amd64 Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
rc linux-image-extra-3.13.0-61-generic 3.13.0-61.100 amd64 Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
rc linux-image-extra-3.13.0-62-generic 3.13.0-62.102 amd64 Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
rc linux-image-extra-3.13.0-63-generic 3.13.0-63.103 amd64 Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
rc linux-image-extra-3.13.0-65-generic 3.13.0-65.106 amd64 Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
rc linux-image-extra-3.13.0-66-generic 3.13.0-66.108 amd64 Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
rc linux-image-extra-3.13.0-67-generic 3.13.0-67.110 amd64 Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
rc linux-image-extra-3.13.0-68-generic 3.13.0-68.111 amd64 Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
rc linux-image-extra-3.13.0-71-generic 3.13.0-71.114 amd64 Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
rc linux-image-extra-3.13.0-73-generic 3.13.0-73.116 amd64 Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
rc linux-image-extra-3.13.0-74-generic 3.13.0-74.118 amd64 Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
rc linux-image-extra-3.13.0-76-generic 3.13.0-76.120 amd64 Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
rc linux-image-extra-3.13.0-77-generic 3.13.0-77.121 amd64 Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
rc linux-image-extra-3.13.0-79-generic 3.13.0-79.123 amd64 Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
rc linux-image-extra-3.13.0-83-generic 3.13.0-83.127 amd64 Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
rc linux-image-extra-3.13.0-85-generic 3.13.0-85.129 amd64 Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
rc linux-image-extra-3.13.0-86-generic 3.13.0-86.131 amd64 Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
rc linux-image-extra-3.13.0-87-generic 3.13.0-87.133 amd64 Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
ii linux-image-extra-3.13.0-88-generic 3.13.0-88.135 amd64 Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
ii linux-image-extra-3.13.0-91-generic 3.13.0-91.138 amd64 Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
ii linux-image-extra-virtual 3.13.0.91.97 amd64 Transitional package.
ii linux-image-generic 3.13.0.91.97 amd64 Generic Linux kernel image
ii linux-image-virtual 3.13.0.91.97 amd64 This package will always depend on the latest minimal generic kernel image.
答案1
所有标记的内核rc均未安装。
我觉得没问题。两个内核3.13.0-91和3.13.0-88都已安装。
答案2
我现在也遇到了这个问题。所以我手动将 /boot 中的数字输入到我的命令中：
sudo apt-get --purge autoremove linux-image-3.13.0-{24,85,{88..96}}-generic linux-headers-3.13.0-{24,85,{88..96}}-generic
但是您的 dpkg 列表显示大部分“rc”，即已删除的内核。但它们的配置被保留。这通常是好的，但在（很多）内核上却不是。当您使用不带 --purge 的 autoremove 时会发生这种情况。
之后，您可以使用上述命令（如果尚未卸载，则不包含标题）和相应的数字来删除它们。但这样做并不那么重要。但是标题也会占用大量空间和文件 inode。