编译升级

[root@localhost ~]# yum groupinstall "Development Tools" -y    
[root@localhost ~]# yum install -y elfutils-libelf-devel bc openssl-devel ncurses-devel wget ntpdate vim net-tools    
[root@localhost ~]# ntpdate -u times.aliyun.com    
[root@localhost ~]# wget https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-5.4.tar.xz    
[root@localhost ~]# tar -xf linux-5.4.tar.xz -C /usr/src/     
[root@localhost ~]# cd /usr/src/linux-5.4/    
[root@localhost linux-5.4]# cp /boot/config-3.10.0-957.el7.x86_64 .config    
[root@localhost linux-5.4]# sh -c 'yes "" | make oldconfig'    
[root@localhost linux-5.4]# make -j8 bzImage    
[root@localhost linux-5.4]# make -j8 modules    
[root@localhost linux-5.4]# make -j8 modules_install    
[root@localhost linux-5.4]# make install    
[root@localhost linux-5.4]# awk -F\' '$1=="menuentry " {print $2}' /etc/grub2.cfg    
[root@localhost linux-5.4]# grub2-set-default 0 && reboot    
[root@localhost ~]# uname -a