文章目录

1、准备工作2、配置RT3、配置内核4 修改grub配置文件, 更改启动内核

1、准备工作

rt补丁下载 https://mirrors.edge.kernel.org/pub/linux/kernel/projects/rt/3.18/older/patch-3.18.28-rt28.patch.gz #我下载patch-3.18.28-rt28.patch.gz 内核源码下载 https://cdn.kernel.org/pub/linux/kernel/v3.x/linux-3.18.28.tar.xz #我下载linux-3.18.28.tar.gz 安装make menuconfig 环境

sudo apt-get install libncurses-dev

将gz文件复制到/usr/src文件夹

#cd 到linux-3.18.28.tar.gz的文件夹或加上路径 sudo cp linux-3.18.28.tar.gz /usr/src sudo cp patch-3.18.28-rt28.patch.gz /usr/src

解压

#cd /usr/src sudo tar -xf linux-3.18.28.tar.gz

2、配置RT

cd linux-3.18.28 sudo gzip -cd ../patch-3.18.28-rt28.patch.gz | patch -p1 --verbose

这里 …/patch-3.18.28-rt28.patch.gz是因为 patch-3.18.28-rt28.patch.gz文件在该目录的上一个目录（否则加上绝对路径） error:patch: **** Can’t create temporary file Documentation/hwlat_detector.txt.o1WMoof : Permission denied

sudo -s sudo gzip -cd ../patch-3.18.28-rt28.patch.gz | patch -p1 --verbose

3、配置内核

sudo make localmodconfig #生成.config sudo make menuconfig

error: /bin/sh: 1: bison: not found

sudo apt-get install bison

error：/bin/sh: 1: flex: not found scripts/Makefile.lib:202: recipe for target ‘scripts/kconfig/zconf.lex.c’ failed make[1]: *** [scripts/kconfig/zconf.lex.c] Error 127 Makefile:514: recipe for target ‘localmodconfig’ failed

sudo apt-get install flex

error: *** Unable to find the ncurses libraries or the *** required header files. *** ‘make menuconfig’ requires the ncurses libraries.

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*** Install ncurses (ncurses-devel or libncurses-dev *** depending on your distribution) and try again.

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scripts/kconfig/Makefile:206: recipe for target ‘scripts/kconfig/dochecklxdialog’ failed

sudo apt-get install libncurses-dev

sudo make menuconfig后如下依次选择： save-exit 编译安装

sudo make -j2 #编辑内核，耗时-j2是2个线程

error: scripts/sign-file.c:25:30: fatal error: openssl/opensslv.h: No such file or directory sudo apt-get install libssl-dev errot: The following packages have unmet dependencies: libssl-dev : Depends: libssl1.0.0 (= 1.0.2g-1ubuntu4) but 1.0.2g-1ubuntu4.13 is to be installed Depends: zlib1g-dev but it is not going to be installed E: Unable to correct problems, you have held broken packages. 首先安装aptitude工具

sudo apt-get install aptitude

再利用aptitude来安装libssl-dev

sudo aptitude install libssl-dev

(n y y) make install -j2的部分界面： 接着

sudo make modules -j2 sudo make modules_install -j2

sudo make install -j2

更新grub

cd /boot ls #查看是否成功生成rt核 sudo update-grub

vim /boot/grub/grub.cfg #看内核是否添加到grub，vim不行就用gedit

如果自动安装失败，就需要手动修改 /boot/grub/grub.conf 去配置启动项，如下图 重启： sudo reboot shift+F12(或F2) 终端输入：uname –a

4 修改grub配置文件, 更改启动内核

查看grub目录

grep menuentry /boot/grub/grub.cfg

sudo gedit /etc/default/grub

修改 GRUB_DEFAULT=“1>4”

GRUB_DEFAULT=“1>4”，1时绿色的1，4是黄色的4 或者GRUB_DEFAULT=“Advanced options for Ubuntu>Ubuntu, with Linux 3.18.28-rt28” 更新，重启

sudo update-grub sudo reboot uname -r