Linux: GRUB

 

https://docs.fedoraproject.org/en-US/quick-docs/grub2-bootloader/

 

command:

set 
set pager=1
ls
set root=(hd0,msdos1)
insmod linux
insmod normal
normal
help set

 

GURB_TIMEOUT_STYLE=menu # hidden
GRUB_TIMEOUT=5
GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)"
GRUB_DEFAULT=saved
GRUB_SAVEDEFAULT=true  # 保留上次选择的kernel, /boot/grub/grubenv saved_entry
GRUB_DISABLE_SUBMENU=true
GRUB_TERMINAL_OUTPUT="console"
GRUB_CMDLINE_LINUX="rd.lvm.lv=fedora/root rhgb quiet selinux=0"
GRUB_DISABLE_RECOVERY="true"
GRUB_ENABLE_BLSCFG=true

 

 

Reset Password:

RHEL

rw init=/bin/bash enforcing=0

mount -o remount,rw /

exec /sbin/init