====== SED - Change - Change string on a specific line number ======

Replace the string on a specific line number only.

<code bash>
sed '3 s/unix/linux/' filename
</code>

----

===== Example =====

Input file

<file bash test.txt>
aaaaa
bbbbb
ccccc    
ddddd
eeeee
aaaaa
bbbbb
ccccc    
ddddd
eeeee
</file>

----

Run:

<code bash>
sed '3 s/cc/linux/' file.txt
</code>

returns:

<code bash>
aaaaa
bbbbb
linuxccc    
ddddd
eeeee
aaaaa
bbbbb
ccccc    
ddddd
eeeee
</code>