分享 MacOS 的一些系统fix脚本（dns、sleep）

现在在用 macbook air m1，太离谱了，一合盖就睡眠断 vpn，然后还有极高概率 dns broken，完全无法自动恢复，经过一段时间摸索，找出来了可行处理手段

合盖不睡眠

#!/bin/bash

#***************************************************************************

#*** noz - prevent laptop from sleeping when lid is closed

#***************************************************************************

#***** set some defaults *****
BATTERY_SLEEP=5 # in minutes
DEF_WAKE_LEN=36000 # in seconds

#***** determine timeout value *****
timeout_len=${1:-$DEF_WAKE_LEN}

function prevent_sleep() {
    echo -n "Preventing sleep for $timeout_len seconds; press <enter> to continue..."
    sudo pmset -b disablesleep 1
    sudo pmset -b sleep 0
}

function enable_sleep() {
    # $1: <enter> = 0, timeout = 1, Ctrl-C = undef

    #----- insert a newline for timeout or Ctrl-C -----

    if [[ ${1:-1} -eq 1 ]]; then    echo; fi

    echo "Restoring previous battery sleep setting: $BATTERY_SLEEP"
    sudo pmset -b disablesleep 0
    sudo pmset -b sleep $BATTERY_SLEEP

    #----- sleep on timeout only -----
    if [[ ${1:--1} -eq 1 ]]; then   sudo pmset sleepnow; fi
    exit
}



#***** prevent it from sleeping *****
prevent_sleep

#***** trap Ctrl-C *****
trap enable_sleep INT

#***** wait for an enter *****
read -t $timeout_len
rc=$?

#***** re-enable normal sleep *****
enable_sleep $rc

重启系统 dns 服务

# redns

sudo killall -HUP mDNSResponder