boot image parameters

 cat /proc/cmdline

BOOT_IMAGE=/boot/vmlinuz-5.15.0-56-generic root=UUID=bced2b4a-130c-4f7a-9fd6-fff449cf6c22 ro console=tty1 console=ttyS0 net.ifnames=0 biosdevname=0

 dmesg | grep "Command line"

[    0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-5.15.0-56-generic root=UUID=bced2b4a-130c-4f7a-9fd6-fff449cf6c22 ro console=tty1 console=ttyS0 net.ifnames=0 biosdevname=0

https://manpages.ubuntu.com/manpages/bionic/man7/bootparam.7.html

tag grub