在公升級新的核心後，如何刪除舊的核心檔案？
舉例來說，假設我們剛剛執行了 apt-get dist-upgrade 公升級到了倉庫中最新的核心版本（如從 3.2.0-30 公升級到了 3.2.0-34）
default
$ sudo apt-get dist-upgrade
reading package lists… done
building dependency tree
reading state information… done
calculating upgrade… done
the following new packages will be installed:
libframe6 libgeis1 libgrail5 linux-headers-3.2.0-34
linux-headers-3.2.0-34-generic linux-image-3.2.0-34-generic
the following packages will be upgraded:
libgrip0 linux-headers-generic linux-image-generic
3 upgraded, 6 newly installed, 0 to remove and 0 not upgraded.
need to get 50.9 mb of archives.
after this operation, 181 mb of additional disk space will be used.
do you want to continue [y/n]? y
…$ sudo apt-get dist-upgrade
reading package lists… done
building dependency tree
reading state information… done
calculating upgrade… done
the following new packages will be installed:
libframe6 libgeis1 libgrail5 linux-headers-3.2.0-34
linux-headers-3.2.0-34-generic linux-image-3.2.0-34-generic
the following packages will be upgraded:
libgrip0 linux-headers-generic linux-image-generic
3 upgraded, 6 newly installed, 0 to remove and 0 not upgraded.
need to get 50.9 mb of archives.
after this operation, 181 mb of additional disk space will be used.
do you want to continue [y/n]? y
…首先我們需要知道已經安裝了哪些核心版本，可以使用下面的命令：
default
$ dpkg --get-selections | grep linux
fonts-linuxlibertine install
libselinux1 install
linux-firmware install
linux-headers-3.2.0-30 install
linux-headers-3.2.0-30-generic install
linux-headers-3.2.0-34 install
linux-headers-3.2.0-34-generic install
linux-headers-generic install
linux-image-3.2.0-30-generic install
linux-image-3.2.0-34-generic install
linux-image-generic install
linux-libc-dev install
linux-sound-base install
pptp-linux install
syslinux install
syslinux-common install
util-linux install
$ dpkg --get-selections | grep linux
fonts-linuxlibertine install
libselinux1 install
linux-firmware install
linux-headers-3.2.0-30 install
linux-headers-3.2.0-30-generic install
linux-headers-3.2.0-34 install
linux-headers-3.2.0-34-generic install
linux-headers-generic install
linux-image-3.2.0-30-generic install
linux-image-3.2.0-34-generic install
linux-image-generic install
linux-libc-dev install
linux-sound-base install
pptp-linux install
syslinux install
syslinux-common install
util-linux install
這樣，我們就可以從中找到舊的核心檔案（linux-headers-3.2.0-30 linux-headers-3.2.0-30-generic linux-image-3.2.0-30-generic），相應地將他們刪除：
default
$ sudo apt-get purge linux-headers-3.2.0-30 linux-headers-3.2.0-30-generic linux-image-3.2.0-30-generic
reading package lists… done
building dependency tree
reading state information… done
the following packages will be removed:
linux-headers-3.2.0-30* linux-headers-3.2.0-30-generic*
linux-image-3.2.0-30-generic*
0 upgraded, 0 newly installed, 3 to remove and 0 not upgraded.
after this operation, 180 mb disk space will be freed.
do you want to continue [y/n]? y
…$ sudo apt-get purge linux-headers-3.2.0-30 linux-headers-3.2.0-30-generic linux-image-3.2.0-30-generic
reading package lists… done
building dependency tree
reading state information… done
the following packages will be removed:
linux-headers-3.2.0-30* linux-headers-3.2.0-30-generic*
linux-image-3.2.0-30-generic*
0 upgraded, 0 newly installed, 3 to remove and 0 not upgraded.
after this operation, 180 mb disk space will be freed.
do you want to continue [y/n]? y
…linux deepin 在使用 apt-get 更新與刪除舊核心後會自動呼叫 update-grub 更新 grub.cfg 檔案，這樣，我們就不用擔心刪除舊核心後因為 grub 的配置原因而無法從新的核心啟動的問題。
重啟後，我們即可在新的 grub 選單中從新核心啟動。
更新CentOS核心後刪除舊核心
yum update 更新系統之後，如果有並且使用新核心，則舊核心可以刪除。檢視當前核心 root test uname a linux test.test1 3.10.0 229.el7.x86 64 1 smp fri mar 6 11 36 42 utc 2015 x86 64 x86 64 ...
Fedora 刪除舊核心
由於fedora更新公升級非常的頻繁，所以，非常有必要清除陳舊的核心，方法如下 1.檢視當前系統中已安裝的核心相關包 root knityster rpm qa grep kernel kernel headers 2.6.32.12 115.fc12.i686 kernel firmware 2....
Fedora 刪除舊核心
由於fedora更新公升級非常的頻繁，所以，非常有必要清除陳舊的核心，方法如下 root knityster rpm qa grep kernel kernel headers 2.6.32.12 115.fc12.i686 kernel firmware 2.6.32.12 115.fc12.no...