Issue
I am trying to search for a particular line in a file using grep command and I am successful doing that. Now I want to copy the entire line to a new line right after the original line. In other words, the original line should be followed by the new line with same content.
For example: Original data:
Apple
Samsung
Nokia
HTC
Say if I want the new data to look like
Apple
Samsung
Samsung
Nokia
HTC
I tried grep and pipe with sed and I failed. Can anyone please help me with this?
Thanks
Solution
This might work for you (GNU sed):
sed '/pattern/H;//G' file
If the pattern can occur more than once:
sed 'x;z;x;/pattern/H;//G' file
Answered By - potong Answer Checked By - Pedro (WPSolving Volunteer)