每天一个Linux命令（12）more命令

more命令是一个基于vi编辑器文本过滤器，它以全屏幕的方式按页显示文本文件的内容，支持vi中的关键字定位操作。

该命令一次显示一屏文本，满屏后停下来，并且在屏幕的底部出现一个提示信息，给出至今己显示的该文件的百分比：

--More--（XX%）可以用下列不同的方法对提示做出回答：

按Space键:     显示文本的下一屏内容。

按Enier键:      只显示文本的下一行内容。 按斜线符|：接着输入一个模式，可以在文本中寻找下一个相匹配的模式。

按H键:           显示帮助屏，该屏上有相关的帮助信息。

按B键:           显示上一屏内容。

按Q键:           退出more命令。

Ctrl+Z:          退出命令

    (1)用法:

用法:  more [-dlfpcsu ] [-num ] [+/ pattern] [+ linenum] [file ... ]

more [选项]  [文件]

    (2)功能:

功能:查看文件文档中的内容(支持按页查看和直接跳转行)

    (3)选项参数:

      1) -<数字>:                                 指定每屏显示的行数[-num]

2) -d:                                         显示“[press space to continue,'q' to quit.]”和“[Press 'h' for instructions]”

3) -c:                                         不进行滚屏操作。每次刷新这个屏幕

4) -s:                                         将多个空行压缩成一行显示

5) -u:                                         禁止下划线

6) +<数字>:                               从指定数字的行开始显示[+linenum]

7) +/pattern:                             在每个档案显示前搜寻该字串（pattern），然后从该字串前两行之后开始显示

    (4)实例:

1)[sunjimeng@localhost Documents]$ more -dc more_text1                         显示文件more_text1的内容，但在显示之前先清屏，并且在屏幕的最下方显示完核的百分比。

[sunjimeng@localhost ~]$ cd Documents
[sunjimeng@localhost Documents]$ ll
总用量
-rw-r--r--.  root root  5月    : more_text1
[sunjimeng@localhost Documents]$ more -dc more_text1

执行过以后，屏幕只剩下:

I am studing orders of Linux!
I am trying to write as many as lines of text!

No matter how low you consider yourself,
there is always someone looking behind you,
hoping that they were that high!

Something you want keep all the time,always you will lose!

Never forget to say "thanks"!

Hppay today,also,prepared for happiness in the future!

Don't aim your success if you want it,just do what you love and believe and fina
lly you will success!

Maybe you can be laze man like a pig,but you can't feel free as it!

I am a college school student!
I am planning to live and work in hangzhou or guangzhou!
I am from hefei anhui!
Enough,I have write too many words!
[sunjimeng@localhost Documents]$ 

上面的是终端窗口比较大的情况，所有内容能完全显示，下面是显示不完全的情况:

I am studing orders of Linux!
I am trying to write as many as lines of text!

No matter how low you consider yourself,
there is always someone looking behind you,
hoping that they were that high!

Something you want keep all the time,always you will lose!

Never forget to say "thanks"!

Hppay today,also,prepared for happiness in the future!
--More--(%)[Press space to continue, 'q' to quit.]                  //在这里显示百分比

2)[sunjimeng@localhost Documents]$ more -10 more_text1                       显示文件more_text1的内容，每10行显示一次，而且在显示之前先清屏。

[sunjimeng@localhost Documents]$ more - more_text1
I am studing orders of Linux!
I am trying to write as many as lines of text!

No matter how low you consider yourself,
there is always someone looking behind you,
hoping that they were that high!

Something you want keep all the time,always you will lose!

3)[sunjimeng@localhost Documents]$ more +4 -10 more_text1                 从第4行开始显示，每页显示10行

[sunjimeng@localhost Documents]$ more -d - more_text1
I am studing orders of Linux!
I am trying to write as many as lines of text!

No matter how low you consider yourself,
there is always someone looking behind you,
hoping that they were that high!

Something you want keep all the time,always you will lose!

--More--(%)[Press space to continue, 'q' to quit.]                                    //在这里我按了h键，弹出命令的参考。
Most commands optionally preceded by integer argument k.  Defaults in brackets.
Star (*) indicates argument becomes new default.
-------------------------------------------------------------------------------
<space>                 Display next k lines of text [current screen size]
z                       Display next k lines of text [current screen size]*
<return>                Display next k lines of text []*
d or ctrl-D             Scroll k lines [current scroll size, initially ]*
q or Q or <interrupt>   Exit from more
s                       Skip forward k lines of text []
f                       Skip forward k screenfuls of text []
b or ctrl-B             Skip backwards k screenfuls of text []
'                       Go to place where previous search started
=                       Display current line number
/<regular expression>   Search for kth occurrence of regular expression []
n                       Search for kth occurrence of last r.e []
!<cmd> or :!<cmd>       Execute <cmd> in a subshell
v                       Start up /usr/bin/vi at current line
ctrl-L                  Redraw screen
:n                      Go to kth next file []
:p                      Go to kth previous file []
:f                      Display current file name and line number
.                       Repeat previous command
-------------------------------------------------------------------------------

和上面的对比可知，此时显示的也是10行，但第一行的内容和上面第一行的不一样

[sunjimeng@localhost Documents]$ more + - more_text1

No matter how low you consider yourself,
there is always someone looking behind you,
hoping that they were that high!

Something you want keep all the time,always you will lose!

Never forget to say "thanks"!

Hppay today,also,prepared for happiness in the future!
--More--(%)        //上面的百分比是38%

4)[sunjimeng@localhost Documents]$ more +/Never more_text1                  找到Never字符串所在的行，然后从此行显示，之前的跳过

[sunjimeng@localhost Documents]$ more more_text1                          //先查看文档中的所有文本数据
I am studing orders of Linux!
I am trying to write as many as lines of text!

No matter how low you consider yourself,
there is always someone looking behind you,
hoping that they were that high!

Something you want keep all the time,always you will lose!

Never forget to say "thanks"!

Hppay today,also,prepared for happiness in the future!

Don't aim your success if you want it,just do what you love and believe and finally you will success!

Maybe you can be laze man like a pig,but you can't feel free as it!

I am a college school student!
I am planning to live and work in hangzhou or guangzhou!
I am from hefei anhui!
Enough,I have write too many words!                                       //命令详解从这里开始
[sunjimeng@localhost Documents]$ more +/Never more_text1

...跳过
Something you want keep all the time,always you will lose!

Never forget to say "thanks"!

Hppay today,also,prepared for happiness in the future!

Don't aim your success if you want it,just do what you love and believe and finally you will success!

Maybe you can be laze man like a pig,but you can't feel free as it!

I am a college school student!
I am planning to live and work in hangzhou or guangzhou!
I am from hefei anhui!
Enough,I have write too many words!

5)[sunjimeng@localhost Documents]$ cat -n more_text1 |more -10                more命令通常和管道|结合起来使用，配合cat命令带有特定格式输出

[sunjimeng@localhost Documents]$ cat -n more_text1 |more -
         I am studing orders of Linux!
         I am trying to write as many as lines of text!

         No matter how low you consider yourself,
         there is always someone looking behind you,
         hoping that they were that high!

         Something you want keep all the time,always you will lose!

--More--

6)[sunjimeng@localhost Documents]$ ls -l / | more -5                  列一个目录下的文件，由于内容太多，我们应该学会用more来分页显示。这得和管道 | 结合起来。

[sunjimeng@localhost Documents]$ ls -l / | more -
总用量
lrwxrwxrwx.    root root     5月    : bin -> usr/bin
dr-xr-xr-x.    root root  5月    : boot
drwxr-xr-x.   root root  5月    : dev
drwxr-xr-x.  root root  5月    : etc
--more-- 

说明： 每页显示5个文件信息，按 Ctrl+F 或者 空格键 将会显示下5条文件信息。

    (5)其他:  

　　常用操作命令

　　  　 Enter    　　  向下n行，需要定义。默认为1行

　　　　Ctrl+F   　　 向下滚动一屏

　　　　空格键  　　   向下滚动一屏

　　　　Ctrl+B  　　 返回上一屏

　　　　=       　　   输出当前行的行号

　　　　f     　　　 输出文件名和当前行的行号

　　　　V      　　    调用vi编辑器

　　　　!命令   　　  调用Shell，并执行命令

　　　　q       　　　退出more