小发现：Ubuntu使用kexec重启系统(2)

背景：

小发现：Ubuntu使用kexec重启系统

2.查看/etc/default/kexec文件

apple@Ubuntu:~$ cat /etc/init.d/kexec
#! /bin/sh
### BEGIN INIT INFO
# Provides:             kexec
# Required-Start:
# Required-Stop:        reboot
# X-Stop-After:         umountroot
# Default-Start:
# Default-Stop:         6
# Short-Description: Execute the kexec -e command to reboot system
# Description:
### END INIT INFO

PATH=/usr/sbin:/usr/bin:/sbin:/bin

. /lib/lsb/init-functions

test -r /etc/default/kexec && . /etc/default/kexec

do_stop () {
        test "x`cat /sys/kernel/kexec_loaded`y" = "x1y" || exit 0
        test -x /sbin/kexec || exit 0

log_action_msg "Will now restart with kexec"
        kexec -e
        log_failure_msg "kexec failed"
}

case "$1" in
  start)
        # No-op
        ;;
  restart|reload|force-reload)
        echo "Error: argument '$1' not supported" >&2
        exit 3
        ;;
  stop)
        do_stop
        ;;
  *)
        echo "Usage: $0 start|stop" >&2
        exit 3
        ;;
esac
exit 0
apple@ubuntu:~$

/etc/init.d/kexec脚本使用了/etc/default/kexec中的配置，查看/etc/default/kexec

apple@ubuntu:/$ cat /etc/default/kexec
# Defaults for kexec initscript
# sourced by /etc/init.d/kexec and /etc/init.d/kexec-load

# Load a kexec kernel (true/false)
LOAD_KEXEC=true

# Kernel and initrd image
KERNEL_IMAGE="/vmlinuz"
INITRD="/initrd.img"

# If empty, use current /proc/cmdline
APPEND=""
apple@ubuntu:/$ cat /etc/default/kexec
# Defaults for kexec initscript
# sourced by /etc/init.d/kexec and /etc/init.d/kexec-load

# Load a kexec kernel (true/false)
LOAD_KEXEC=true

# Kernel and initrd image
KERNEL_IMAGE="/vmlinuz"
INITRD="/initrd.img"

# If empty, use current /proc/cmdline
APPEND=""

原来这个/etc/default/kexec是配置重启过程中kexec的参数的

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