Linux上可用的watch命令在macOS上不存在。如果你不想使用brew，你可以将这个bash函数添加到你的shell配置文件中。

# execute commands at a specified interval of seconds
function watch.command {
  # USAGE: watch.commands [seconds] [commands...]
  # EXAMPLE: watch.command 5 date
  # EXAMPLE: watch.command 5 date echo 'ls -l' echo 'ps | grep "kubectl\\\|node\\\|npm\\\|puma"'
  # EXAMPLE: watch.command 5 'date; echo; ls -l; echo; ps | grep "kubectl\\\|node\\\|npm\\\|puma"' echo date 'echo; ls -1'
  local cmds=()
  for arg in "${@:2}"; do
    echo $arg | sed 's/; /;/g' | tr \; \\n | while read cmd; do
      cmds+=($cmd)
    done
  done
  while true; do
    clear
    for cmd in $cmds; do
      eval $cmd
    done
    sleep $1
  done
}

https://gist.github.com/Gerst20051/99c1cf570a2d0d59f09339a806732fd3

你可以用shell循环来模拟基本的功能:

while :; do clear; your_command; sleep 2; done

这将永远循环，清除屏幕，运行命令，并等待两秒钟-基本的watchyour_command实现。

你可以更进一步，创建一个watch.sh脚本，它可以接受your_command和sleep_duration作为参数:

#!/bin/bash
# usage: watch.sh <your_command> <sleep_duration>

while :; 
  do 
  clear
  date
  $1
  sleep $2
done

或者，在你的~/。bashrc文件:(

function watch {
    while :; do clear; date; echo; $@; sleep 2; done
}

如果手表不想通过安装

brew install watch

有另一个类似的/复制版本，安装和工作完美为我

brew install visionmedia-watch

https://github.com/tj/watch

Linux上可用的watch命令在macOS上不存在。如果你不想使用brew，你可以将这个bash函数添加到你的shell配置文件中。

# execute commands at a specified interval of seconds
function watch.command {
  # USAGE: watch.commands [seconds] [commands...]
  # EXAMPLE: watch.command 5 date
  # EXAMPLE: watch.command 5 date echo 'ls -l' echo 'ps | grep "kubectl\\\|node\\\|npm\\\|puma"'
  # EXAMPLE: watch.command 5 'date; echo; ls -l; echo; ps | grep "kubectl\\\|node\\\|npm\\\|puma"' echo date 'echo; ls -1'
  local cmds=()
  for arg in "${@:2}"; do
    echo $arg | sed 's/; /;/g' | tr \; \\n | while read cmd; do
      cmds+=($cmd)
    done
  done
  while true; do
    clear
    for cmd in $cmds; do
      eval $cmd
    done
    sleep $1
  done
}

https://gist.github.com/Gerst20051/99c1cf570a2d0d59f09339a806732fd3

我从这里开始回答:

bash -c 'while [ 0 ]; do <your command>; sleep 5; done'

但你最好装个手表，因为这不是很干净……