delete a line in a file from command prompt 1

[ozi403]

How can I delete a line in a file from command prompt?

 

[Chacalinc]

man sed

sed 'Xn' file.txt

where X is the line number.

Cheers.

Chacal, Inc.

 

[Chacalinc]

BTW, redirect the output to another file:

sed '10d' file.txt > output.txt

Cheers,

Chacal, Inc.

 

[p5wizard]

with ed you can edit the file in place, no need for another file (other than the temp copy ed will make for itself)

delete line number 10 from file.txt from command line with an inline input document:
ed file.txt <<eof_ed
10d
w
q
eof_ed

or a one-liner:
echo "10d\nw\nq"|ed file.txt

HTH,

p5wizard