我如何使用sed选择性替换某些行

Question

I have text as follows in file:

Line 1
Line 2
WORD1
Line3
Line 4
WORD2
Line5

I would like to replace all lines between WORD1 and WORD2 to produce final output:

Line 1
Line 2
NEW
LINES
XXXXX
Line5

With sed '/WORD1/,/WORD2/d' input.txt I can remove the lines, but how can I replace them instead of deleting them?

Answer 1

One way:

Replacement text file:

$ cat rep
NEW
LINES
XXXXX

Input file:

$ cat file
Line 1
Line 2
WORD1
Line3
Line 4
WORD2
Line5

sed command:

$ sed '/WORD1/,/WORD2/{
> /WORD2/r rep
> d
> }' file

The sed command seraches for the line range WORD1 till WORD2 and deletes those lines(d) , and when WORD2 is encounterd, it dumps the replacement file contents(r rep).

Answer 2

This might work for you (GNU sed):

sed '/WORD1/,/WORD2/c\NEW\nLINES\nXXXXX' file

This uses the range match and the c (change) command.

Answer 3

如果awk没问题，请尝试以下操作：

awk '/WORD1/{p=1; print "NEW\nLINES\nXXXXX"}; !p; /WORD2/{p=0}' file