Debian 12 linux系统更换Cloud内核降低内存使用

Debian 12 linux系统更换Cloud内核降低内存使用

一、更新package

apt update -y && apt dist-upgrade -y

二、查看系统现有内核

dpkg -l|grep linux-image

ii  linux-image-6.1.0-11-amd64      6.1.38-4                                amd64        Linux 6.1 for 64-bit PCs (signed)
ii  linux-image-6.1.0-9-amd64       6.1.27-1                                amd64        Linux 6.1 for 64-bit PCs (signed)
ii  linux-image-amd64               6.1.38-4                                amd64        Linux for 64-bit PCs (meta-package)

三、查看最新 cloud 内核

apt-cache search linux-image | grep cloud

linux-image-6.1.0-11-cloud-amd64 - Linux 6.1 for x86-64 cloud (signed)

四、安装Cloud内核

apt install linux-image-6.1.0-11-cloud-amd64  -y

五、更新grub

update-grub

六、重启

reboot

七、验证是否成功

uname -r

6.1.0-11-cloud-amd64

八、使用 htop 查看内存占用，别原来的内核可以少使用 18M 内存

• 卸载老内核,释放空间

  apt remove linux-image-6.1.0-9-amd64  linux-image-6.1.0-9-amd64 \
  linux-headers-6.1.0-9-amd64  linux-headers-6.1.0-9-amd64
  apt autoremove

• 提示信息，可以释放不少硬盘空间

  Use 'apt autoremove' to remove it.
  The following packages will be REMOVED:
  linux-headers-6.1.0-9-amd64 linux-image-6.1.0-9-amd64
  0 upgraded, 0 newly installed, 2 to remove and 0 not upgraded.
  After this operation, 411 MB disk space will be freed.
  Do you want to continue? [Y/n] y
  After this operation, 57.5 MB disk space will be freed.