centos7 解压initramfs文件
1、拷贝initramfs文件
cp /boot/initramfs-3.10.0-514.26.2.el7.x86_64.img /opt/
2、开始解压
cd /opt
mkdir initramfs
cd initramfs
/usr/lib/dracut/skipcpio ../initramfs-3.10.0-514.26.2.el7.x86_64.img | zcat | cpio -ivd
cp /boot/initramfs-3.10.0-514.26.2.el7.x86_64.img /opt/
cd /opt
mkdir initramfs
cd initramfs
/usr/lib/dracut/skipcpio ../initramfs-3.10.0-514.26.2.el7.x86_64.img | zcat | cpio -ivd