Extracting initramfs image
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Using "skipcpio" command in RHEL7.x, otherwise, we use "gunzip" in earlier RHEL versions. So, the command to extract initramfs image file in RHEL7.x is given below:
# /usr/lib/dracut/skipcpio /boot/initramfs-$(uname -r).img | gunzip -c | cpio -id
In earlier versions, we could do this by using the command gunzip :
# gunzip -c /boot/initramfs-$(uname -r).img | cpio -i -d
