Vim replaces "Turn"

:[range]s/from/to/[flags]

• range: The search scope, if no range is specified, acts on but forward.

  1. :1,10s/from/to/Indicates a search substitution between lines 1th through 10th (containing 1th, 10th lines);
  2. :10s/from/to/Indicates that the search is replaced only on the 10th line;
  3. :%s/from/to/Represents a search substitution in all rows;
  4. 1,$s/from/to/Ditto.

• flagsThe following four options are available:

  1. cConfirm, ask before each replacement;
  2. eError, do not display errors;
  3. gGloble, do not ask, the whole line is replaced. If no option is added g , only the first matching string of each row is replaced;
  4. iIgnore, ignoring case.

  These options can be used in combination, such as representing case insensitive cgi , full line substitution, and asking before replacing.

Regular expressions

1. Metacharacters

   • Metacharacters

     Meta character	Description
     .	Match any character
     [ABC]	Matches any one of the characters in the square brackets, which can be used to - represent a range of characters. such as [a-z0-9] matches lowercase letters and numbers
     [^ABC]	Match any character except the character in square brackets
     \d	Matching Arabic numerals, equivalent to [0-9]
     \d	Matches any character other than the Arabic numeral, equivalent to [^0-9]
     \x	Match hexadecimal digits, equivalent to [0-9a-fa-f]
     \x	Matches any character other than a hexadecimal number, equivalent to [^0-9a-fa-f]
     \l	Match [A-z]
     \l	Match [^a-z]
     \u	Match [A-z]
     \u	Match [^a-z]
     \w	Match word letter, equivalent to [0-9a-za-z_]
     \w	Matches any character other than the word letter, equivalent to [^0-9a-za-z_]
     \ t	Match <TAB> character
     \s	Match white space character, equivalent to [\ t]
     \s	Match non-whitespace characters, equivalent to [^\t]

   • Some ordinary characters need to be transferred

     \*	match *   character
     	.   character
     \/	match   /   character
     \	match   \   character
     \[	match   [   characters
     \]	match   ]   character

      

   • Represents the number of metacharacters

     *	match 0-any one
     \+	match 1-any of
     \?
     \{n,m}	match n-m
     \{n}	match n
     \{n,}	matches N-any
     \{,m}	match 0-m

      

   • Meta-character representing position

     Meta character	Description
     $	Match end of Line
     ^	Match beginning
     \<	Match the first words of the word
     \>	Match word endings

3. Substitution variables

   Regular expressions in and around regular \( expressions \) , which can be used in the subsequent use \1 , \2 such as variables to access \( and \) in the content.

Example

1. Delete line trailing spaces::%s/\s+$//g
2. Remove extra spaces at the beginning of the line: %s/^\s*// or%s/^ *//
3. Delete empty lines that are not in the content: %s/^$// org/^$/d
4. Delete empty lines that consist of spaces: %s/^\s*$// org/^\s*$/d
5. Delete blank lines beginning with space or tab to the end: %s/^[ |\t]*$// org/^[ |\t]*$/d

6. Replace all strings in the text "abc......xyz" with "XYZ......ABC" to have the following wording

   :%s/abc\(.*\)xyz/xyz\1abc/g:%s/\(abc\)\(.*\)\(xyz\)/\3\2\1/g

SED: Specify file to replace

Sed-i "s/from/to/g" file name

Vim replaces "Turn"