awk '{$2="#"$2;print $0}' your_file
This will add # to the start of the second (space-separated) column regardless of which position it occurs at.
sed -r -e 's/^.{15}/&#/' file
Insert '#' in position 15
1) Conectar, via SSH, em uma das OVCs utilizando a credencial "administrator@vsphere.local" 2) Executar os comandos abaixo: - ...