Sed move line from n° 40 to 39 position

Question

I have a text file,of 100 lines,i need to move line 40 to line 39(refer to position) How to do this with sed? I tried

sed '40 m 39' file

and

sed '40,39m' file

but give me error. Thanks

I believe this matches the already asked question SED: Move multiple lines to the end of a text file — bsd, Mar 22 '15 at 18:09

Cyrus · Accepted Answer · 2015-03-22T19:54:45.450

3

With GNU sed:

seq 1 43 | sed -e '39{h;d};40{p;g}' | tail -n 8

Output:

edited Mar 22 '15 at 19:54

answered Mar 22 '15 at 19:40

Cyrus

score 1 · Answer 2 · answered Mar 22 '15 at 18:09

1

Try:

$ sed -e '39N;s/\(.*\)\n\(.*\)/\2\
\1/' file

answered Mar 22 '15 at 18:09

cuonglm

Sorry but doesn't work – elbarna Mar 22 '15 at 18:11
Give error sed: -e expression #1, char 23: invalid reference \2 on `s' command's RHS – elbarna Mar 22 '15 at 18:20
@elbarna: sorry, my typo, if you have GNU sed, try sed -e '39N;s/\(.*\)\n\(.*\)/\2\n\1/' file – cuonglm Mar 22 '15 at 18:22

2 Answers2