[SOLVED] bash / sed : editing of the file

Issue

I use sed to remove all lines starting from "HETATM" from the input file and cat to combine another file with the output recieved from SED

sed -i '/^HETATM/ d' file1.pdb
cat fil2.pdb file1.pdb > file3.pdb

is this way to do it in one line e.g. using only sed?

Solution

If you want to consider awk then it can be done in a single command:

awk 'FNR == NR {print; next} !/^HETATM/' file2.pdb file1.pdb > file3.pdb

Answered By - anubhava

Answer Checked By - David Marino (WPSolving Volunteer)