The string in bulk replacement text in Linux--reproduced

(a) replaced by the VI editor.
You can use the: s command to replace a string in Vi/vim.
: S/well/good/replaces the current line with the first well being a good
: S/well/good/g replaces the current line all well is good
: N, $s/well/good/replaces the first well of each row in the beginning of the nth row to the last row good
: N, $s/well/good/g replace the nth line to the last row, and all well is good for each row
N is a number, if N is., indicating the beginning of the current line to the last row
:%s/well/good/(equivalent to: g/well/s//good/) replaces the first well of each row as good
:%s/well/good/g (equivalent to: g/well/s//good/g) replaces all the well in each row as good
You can use # as a delimiter, at which time the middle/not as a delimiter
: s#well/#good/# Replace the current row the first well/is good/
:%s#/usr/bin#/bin#g can change all the paths in the file/usr/bin to/bin

(b) Replace the string directly in the file. (This method replaces the string without opening the file, and can replace multiple files in bulk.) )
1.perl command replacement, the parameter meaning is as follows:
-A auto-delimited mode, separated by a space $_ and saved to @f. Equivalent to @f = Split ". The delimiter can be specified with the-f parameter
-F Specify a delimiter for-a, you can use regular expressions
-e executes the specified script.
-i< extension > Replace the file in place and back up the old file with the specified extension. Do not back up without specifying a name extension.
-L automatically chomp the input content and automatically adds line breaks to the output
-N auto-loop, equivalent to while (<>) {script;}
-P Auto Loop + Auto output, equivalent to while (<>) {script; print;}
Usage examples:
Perl-p-i.bak-e ' s/\bfoo\b/bar/g ' *.c
Replace Foo in all C programs with bar and old files back to. bak

Perl-p-i-e "s/shan/hua/g"./lishan.txt./lishan.txt.bak
Replace "Shan" in Lishan.txt and Lishan.txt.bak with "Hua" in the current folder

Perl-i.bak-pe ' s/(\d+)/1 + $1/ge ' file1 file2
Add a value to each file that appears in the

Bulk Replace file contents under 2.sed command

Format: Sed-i "s/lookup field/replacement field/g" grep lookup field-rl path ' file name

-I means inplace edit, in-place modify file

-R indicates a search sub-directory

-l indicates output matching file name
s means replace, d means delete

Example: Sed-i "s/shan/hua/g" Lishan.txt

Replace the Shan in the current directory with the Hua. lishan.txt

Other uses of SED are as follows:

1. Delete the beginning of the line space
Sed ' s/^[]*//g ' filename
Sed ' s/^ *//g ' filename
Sed ' s/^[[:space:]]*//g ' filename

2. Add new lines after line and before line
After line: sed ' s/pattern/&\n/g ' filename
Before line: sed ' s/pattern/\n&/g ' filename
& Representative Pattern

3. Use variable substitution (using double quotes)
Sed-e "s/$var 1/$var 2/g" filename

4. Insert text before the first line
Sed-i ' 1 i\ insert string ' filename

5. Insert in last line
Sed-i ' $ a\ insert string ' filename

6. Insert before matching line
Sed-i '/pattern/i ' Insert string ' ' filename '

7. Insert after matching line
Sed-i '/pattern/a ' Insert string ' ' filename '

8. Delete lines that consist of empty lines and spaces of text and lines of the # comment
Grep-v ^# FileName | Sed/^[[:space:]]*$/d | Sed/^$/d

The string in bulk replacement text in Linux--reproduced