Linux self-study note--vim and text Three Musketeers Foundation

1. Regular expressions

(1) Extension: Unlike grep, egrep or grep-e do not need to be added \ Escaped

(2) Character matching

.: Matches any single character

[]| [^]: matches any single character outside the specified range |

(3) Number of matches

*: Any time {0,}

\?: 0 or 1 times {0,1}

\+: At least 1 times, at most {1,}

\{n\}: N times   

\{n,b\}: N to B Times

\{n, \}: At least n times, up to No limit

(4) Position anchoring

^: Beginning of the line $: End of line ^...$: Whole line

\<: The first word \>: Suffix \<...\>: Whole word

(5) Grouping

\ (\): Multiple characters are treated as a whole, and can be referenced with \1...\n

2.vim

(1) configuration file:/ETC/VIMRC

(2) Common configuration: Set Nu,set nonu,set hlsearch,set Nohlsearch

(3) Input mode

I: Insert at cursor position I: Inserting at the beginning of the line A: Inserting at the end of A row

o: Insert at cursor location O: Insert on the upstream of the cursor

zz|wq,q!: Save off, do not save close

(4) Cursor Jump

Word Jump W: Jump to the next word First E: Jump to the beginning of a word

in-line jump ^: Beginning of $: End of line

Inline Jump 1g|gg: Wen shou G: Wen Mei #G: Specify Rows

(5) Delimiter

%: Full text $: End of text.: Cursor #,#: Specify range

(6) Edit command

Cut d^: To the beginning d$: to the end of the line DW: Word

DD: Whole line #dw: multiple words #dd: Multiple lines after the cursor

d1g: To the head DG: to the end of the text %d: Full text 1,$: Full text

., $: Cursor at the end of the text

Copy y: Mode with delete

Paste P:d is cut instead of deleted, so d can be pasted directly after P

Replace delete s/grep/Replace, empty to delete/{i ignore case, G full text Replace}

Read File R/path/file

3.sed

(1) Output sed-n ' 1,3p ' constant and silent mode-n with

(2) added sed ' $a append ' sed ' 1i Insert '

(3) Remove sed ' 1, $d '

(4) line replacement sed ' 1, $c newbody '

(5) string substitution sed ' s/grep//g ' with vim replacement

4.awk

(1) Variable NF: Total number of fields NR: Number of rows processed FS: delimiter

(2) Filtering awk '/grep1/,/grep2/'

(3) Split awk-f ': '/grep1/{print $ '

awk ' {fs= ': '}/grep1/{print '

Note that the/grep/match cannot be placed in {}        

(4) Condition awk-f ': ' $1>100{print $ ' note condition if no if () cannot be placed in {}, it can not be used concurrently with/grep/, plus if (), for example:

Awk-f ': '/grep/{if ($1==1) {Prit $}} '

Linux self-study note--vim and text Three Musketeers Foundation