sed (stream editor)

Beberapa cara penggunaan sed.
$ cat port.html
8765
nmap example.com
traceroute example.com
echo "finish"

1. Menghapus 1 baris sesudah pattern.
   sed -i "/8765/{n;d}" port.html
   $ cat port.html
   8765
   traceroute example.com
   echo "finish"
   
2. Menghapus 2 baris sesudah pattern.
   sed -i "/8765/{n;d;d}" port.html
   $ cat port.html
   8765
   echo "finish"
   
3. Menghapus 3 baris sesudah pattern.
   sed -i "/8765/{n;d;d;d}" port.html
   $ cat port.html
   8765
   
4. Menambahkan baris sesudah pattern
   sed -i "/8765.*/a ping example.com" port.html
   $ cat port.html
   8765
   ping example.com
   nmap example.com
   traceroute example.com
   echo "finish"