/boots 只有 200M，所以我尝试删除未使用的 linux-image，例如
sudo apt-get purge linux-image-4.4.250*
并检查
$ dpkg --list|grep linux-image
ii linux-image-4.4.0-210-generic 4.4.0-210.242 amd64 Signed kernel image generic
ii linux-image-generic 4.4.0.210.216 amd64 Generic Linux kernel image
$ dpkg --list|grep linux-headers
ii linux-headers-4.4.0-210 4.4.0-210.242 all Header files related to Linux kernel version 4.4.0
ii linux-headers-4.4.0-210-generic 4.4.0-210.242 amd64 Linux kernel headers for version 4.4.0 on 64 bit x86 SMP
ii linux-headers-generic 4.4.0.210.216 amd64 Generic Linux kernel headers
但是我尝试 sudo apt-get 之后，它显示仍然更新 4.4.250 版本的 initramfs，/boot 再次满了：
$ sudo apt-get autoremove
Reading package lists... Done
Building dependency tree
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 248 not upgraded.
1 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Setting up linux-firmware (1.173.21) ...
update-initramfs: Generating /boot/initrd.img-4.4.250-0404250-generic
/sbin/ldconfig.real: Warning: ignoring configuration file that cannot be opened: /etc/ld.so.conf.d/x86_64-linux-gnu_EGL.conf: No such file or directory
gzip: stdout: No space left on device
E: mkinitramfs failure find 141 cpio 141 gzip 1
update-initramfs: failed for /boot/initrd.img-4.4.250-0404250-generic with 1.
dpkg: error processing package linux-firmware (--configure):
installed linux-firmware package post-installation script subprocess returned error exit status 1
Errors were encountered while processing:
linux-firmware
E: Sub-process /usr/bin/dpkg returned an error code (1)
我不确定我还能做什么？如何释放 /boot 的空间？寻找任何解决方案，我将不胜感激
答案1
200 MiB 相当小。最多保留两个内核/boot已经是您应该清理的最大值。增加 /boot 分区的大小是最好的解决方案，但还有其他方法可以解决此问题：
- 使用比 gzip 更强的压缩（参见 initramfs.conf 手册页）：
COMPRESS=xz
COMPRESSLEVEL=9
- 使用
MODULES=dep而不是默认的MODULES=most。注意：这将使安装的可移植性降低。因此，在更换硬件或将磁盘移入新系统时要小心。