大家好，我尝试使用软件更新升级软件包
我收到错误消息
升级需要磁盘“/boot”上总共 64.9 M 的可用空间。请在“/boot”上至少释放 64.9 M 的额外磁盘空间。您可以使用“sudo apt autoremove”删除旧内核，也可以在 /etc/initramfs-tools/initramfs.conf 中设置 COMPRESS=xz 以减小 initramfs 的大小。
/boot这是我的分区上的文件列表
ls /boot
config-4.15.0-50-generic config-4.4.0-159-generic lost+found System.map-4.15.0-55-generic vmlinuz-4.15.0-54-generic
config-4.15.0-51-generic grub memtest86+.bin System.map-4.15.0-58-generic vmlinuz-4.15.0-55-generic
config-4.15.0-52-generic initrd.img-4.15.0-50-generic memtest86+.elf System.map-4.4.0-150-generic vmlinuz-4.4.0-151-generic
config-4.15.0-54-generic initrd.img-4.15.0-51-generic memtest86+_multiboot.bin System.map-4.4.0-151-generic vmlinuz-4.4.0-159-generic
config-4.15.0-55-generic initrd.img-4.15.0-52-generic System.map-4.15.0-50-generic System.map-4.4.0-159-generic
config-4.15.0-58-generic initrd.img-4.15.0-54-generic System.map-4.15.0-51-generic vmlinuz-4.15.0-50-generic
config-4.4.0-150-generic initrd.img-4.15.0-55-generic System.map-4.15.0-52-generic vmlinuz-4.15.0-51-generic
config-4.4.0-151-generic initrd.img-4.4.0-151-generic System.map-4.15.0-54-generic vmlinuz-4.15.0-52-generic
我该如何清理 中的文件夹/boot？
---更新正文如下----
如果我按照说明操作sudo apt autoremove，我将收到以下消息。
sudo apt autoremove
Reading package lists... Done
Building dependency tree
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 6 not upgraded.
2 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Setting up uuid-runtime (2.27.1-6ubuntu3.8) ...
insserv: warning: script 'upsMonitor' missing LSB tags and overrides
insserv: There is a loop between service torque-scheduler and upsMonitor if stopped
insserv: loop involving service upsMonitor at depth 2
insserv: loop involving service torque-scheduler at depth 1
insserv: Stopping upsMonitor depends on torque-scheduler and therefore on system facility `$all' which can not be true!
insserv: exiting now without changing boot order!
update-rc.d: error: insserv rejected the script header
dpkg: error processing package uuid-runtime (--configure):
subprocess installed post-installation script returned error exit status 1
Setting up linux-image-unsigned-4.4.0-159-generic (4.4.0-159.187) ...
Processing triggers for linux-image-unsigned-4.4.0-159-generic (4.4.0-159.187) ...
/etc/kernel/postinst.d/dkms:
* dkms: running auto installation service for kernel 4.4.0-159-generic
Kernel preparation unnecessary for this kernel. Skipping...
Building module:
cleaning build area....
'make' -j16 NV_EXCLUDE_BUILD_MODULES='' KERNEL_UNAME=4.4.0-159-generic IGNORE_XEN_PRESENCE=1 IGNORE_CC_MISMATCH=1 SYSSRC=/lib/modules/4.4.0-159-generic/build LD=/usr/bin/ld.bfd modules.......(bad exit status: 2)
ERROR (dkms apport): binary package for nvidia-396: 396.37 not found
Error! Bad return status for module build on kernel: 4.4.0-159-generic (x86_64)
Consult /var/lib/dkms/nvidia-396/396.37/build/make.log for more information.
...done.
/etc/kernel/postinst.d/initramfs-tools:
update-initramfs: Generating /boot/initrd.img-4.4.0-159-generic
gzip: stdout: No space left on device
E: mkinitramfs failure find 141 cpio 141 gzip 1
update-initramfs: failed for /boot/initrd.img-4.4.0-159-generic with 1.
run-parts: /etc/kernel/postinst.d/initramfs-tools exited with return code 1
dpkg: error processing package linux-image-unsigned-4.4.0-159-generic (--configure):
subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
uuid-runtime
linux-image-unsigned-4.4.0-159-generic
E: Sub-process /usr/bin/dpkg returned an error code (1)
所以我无法删除旧内核sudo apt autoremove。