Odd-Even file partitionning using sed and awk

I had to run a simulation and because I was printing the internal state of my system and the observed state, I had to separate both in 2 files.

./simulation | sed '1d;$d' | awk 'NR%2==1 {print > "odd_lines.txt"; next} {print > "even_lines.txt"}'

• sed '1d;$d':
  • 1d deletes the first line
  • $d deletes the last line
• awk 'NR%2==1 {print > "odd_lines.txt"; next} {print > "even_lines.txt"}':
  • NR%2==1 current line number (Number of Record) mod 2