mac 哪个是 more 命令？怎么写，怎么 limit 每次输出行数？

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wiki/More_(command)

more [options] [file_name]
-num: This option specifies an integer which is the screen size (in lines).

Supplement 1 · Aug 29, 2019

哦，原来参数写错了，我是说macos里执行more -2 怎么无效

MacOS里面执行

> man more
less - opposite of more

       -n or --line-numbers
Suppresses line numbers.  The default (to use line numbers) may cause less to run more slowly in some cases, especially with a very large input file.  Suppressing line numbers with the -n option will avoid this problem.  Using line numbers means: the line number will be dis played  in  the verbose prompt and in the = command, and the v command will pass the current line number to the editor (see also the dis cussion of LESSEDIT in PROMPTS below).

> more -n 3 long.txt
# 每次输出2行, 怎么少了1行？

Linux 里

> man more
more - file perusal filter for crt viewing

       -number
The screen size to use, in number of lines.

> more -3 long.txt
# 每次输出3行

Supplement 2 · Aug 29, 2019

但 -n or --line-numbers 的描述看起来不是限制每次输出行数啊。

那段英文到底什么意思啊

行数

num

more_

12 replies • 2019-08-31 14:13:18 +08:00

azh7138m

Aug 29, 2019

less
Less is a program similar to more (1)

gIrl1990

Aug 29, 2019

@azh7138m 想要那种每次输出一部分在终端里面，而不是
cat 输出全部
less 0 输出
head 输出头部但不能续读

misaka19000

Aug 29, 2019

less is more

sleepm

Aug 29, 2019 via Android

写的很清楚了，more -num filename
再举个例子 rm -rf / 一般我们写 rm / -rf 但是在 mac 中 -rf 会被当成文件

azh7138m

Aug 29, 2019

这个需求是 split
shell 循环读输出就行

gIrl1990

Aug 29, 2019

@sleepm 你好像没理解我意思，我 APPEND 了再看看
@azh7138m 我 APPEND 了再看看

azh7138m

Aug 29, 2019

我觉得是个 X-Y PROBLEM
https://coolshell.cn/articles/10804.html

gIrl1990

Aug 29, 2019

@azh7138m 不对吧，split 会产生文件，不是我想要的

azh7138m

Aug 29, 2019

如果你坚持用 shell 处理，直接读入数组，每一项就是一行
我还是觉得是个 X-Y PROBLEM
为了一个不存在的问题，在反复 hack

jmc891205

Aug 29, 2019

less 没有你想要的功能

gIrl1990

Aug 30, 2019

MacOS:
```bash
> gsha1sum /usr/bin/more /usr/bin/less
6f6ec068da5870eb28b04d0cc50abc5ec5e4b85e /usr/bin/more
6f6ec068da5870eb28b04d0cc50abc5ec5e4b85e /usr/bin/less
# 这两个是同一个文件？
> more --version
less 487 (POSIX regular expressions)
Copyright (C) 1984-2016 Mark Nudelman

less comes with NO WARRANTY, to the extent permitted by law.
For information about the terms of redistribution,
see the file named README in the less distribution.
Homepage: http://www.greenwoodsoftware.com/less
> more -n 3 long.txt
# 可以实现 linux 里 more 的效果
> less -n 3 long.txt
# 既然是同样文件，为何出错？
```
那如果他们不同，从 Homepage 下载到的源码如何编译出 more 命令？

gIrl1990

Aug 31, 2019

See: https://github.com/gwsw/less/issues/23
```bash
more -n 3 long.txt
more -n3 long.txt
```