Management input and output of operation and maintenance learning and vim editing mode

Unit 4

1. Managing input and output

In a Linux system, the correct output number is 1, the error output number is 2

Perform "student" with ordinary users in the system

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Find/etc-name passwd > File# #重定向正确输出

Find/etc-name passwd 2> file# #重定向错误输出

Find/etc-name passwd &> file# #重定向所有输出

Note: 2>,&> will overwrite the contents of the source file.

>file# #清空file

Find/etc-name passwd >> file# #追加正确输出

Find/etc-name passwd 2>> file# #追加错误输出

Find/etc-name passwd &>> file# #追加所有输出

Note:>> 2>> &>> does not overwrite the contents of the source file, it will characters the corresponding output word to the end of the file.

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| The function of a pipe is to change the output of the previous command into the input of the post-pipeline command.

Ls/bin | Wc-l# #统计ls The number of lines that the/bin command outputs

The wrong output in the system is not available through the pipeline.

Use 2>&1 to change the wrong output number from 2 to 1.

Tee Copy output to specified location

Date |tee file |wc-l# # #tee命令复制date命令的输出到file中, and count the number of output rows

1.vim Command mode

Vim can be configured to work in Vim's command mode

: Set nu# #行号添加

: Set Nonu# #取消行号

: Set mouse=a# #添加鼠标选择

: Set Cursorline# #行线显示

The above settings are temporary,

Permanent setting mode

VIM/ETC/VIMRC# # #此文件为vim的配置文件, at the end of this file add the above parameters, add to the number of files do not need:

2.vim Command mode keyword search

/keywords

N Match down

N Up match

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Character Management in 3.vim command mode

1. Copying of characters

YL# #复制一个字母

y3l# #复制3个字母

YW# #复制一个单词

y3w# #复制3个单词

yy# #复制一行

y3y# #复制3行

P# #复制完成后按 "P" paste

2. Deletion of characters

DL# #删除一个字母

d3l# #删除3个字母

DW# #删除一个单词

d3w# #删除3个单词

DD# #删除一行

D3D# #删除3行

3. Cutting of characters

CL# #剪切一个字母

c3l# #剪切3个字母

CW# #剪切一个单词

c3w# #剪切3个单词

CC# #剪切一行

c3c# #剪切3行

ESC---> P# #剪切过后会进入到插入模式, be sure to exit insert mode when performing a paste action

4.vim Visualization Mode

Press "CTRL + V" in command mode to enter the visual mode

In visual mode, you can select characters in the area

Bulk add characters in visual mode

*>> Ctrl + V Select the column to which you want to add characters

*>> Press "I" into insert mode, write the characters to be added

*>> Press ESC

5. Bulk modification of characters

:%s/original character/replace character # #只替换每一行中出现的第一个原有字符

:%s/original character/replace character/g # #替换所有

:%s/^\ *//g# #把全文行首的空格去掉, "^\ *" indicates the space at the beginning of the line

6.vim Split-screen function

Ctrl+w s # # #上下分屏

Ctrl+w v# # #左右分屏

Ctrl+w c# # #关闭光标所在屏幕

Ctrl+w up or down # # #光标移动到指定屏幕

: SP file2# #同时编辑当前文件和file2

7.vim cursor Movement

in command mode

: Number # #移动到指定的行

G# #文件最后一行

GG# #文件第一行

In insert mode

I# #光标所在位置插入

I# #光标所在行行首

A# #光标所在字符的下一个位置

A# #光标所在行行尾

o# #光标所在行下一行

O# #光标所在行上一行

S# #删除光标所在字符插入

S# #删除光标所在行插入

Exit mode of 8.vim

: Q# #当用vim打开文件但没有对字符作任何操作时可直接退出

: q! # #当用vim打开文件并对字符作操作, quit all operations

: Wq# #保存退出

: wq! # #强行保存退出, effective for Superuser and file owner

9.vim Manual

Vimtutor# #vim的手册

: Q# #退出vimtutor

3.gedit

CTRL+ N # #在gedit中打开一个新的tab

Ctrl+s# #保存文件

Ctrl+o# #打开文件

Ctrl+x# #剪切字符

Ctrl+ V # #粘贴字符

CTRL+ C # #复制字符

Yelp Help:gedit# #gedit的图形手册

Management input and output of operation and maintenance learning and vim editing mode