CODEWITHSUNDEEP
sed
Dennis
Dennis

Reputation: 199

sed over multiple lines to replace a single number

Im new to sed and found some instructiones to that kind of probmen, but none of them worked for me.

I have a file called var.tf with that entry:

variable "nb_instances" {
  description = "Specify the number of vm instances"
  default     = "3"
}

and want to replace the "3" with "4".

I tried to create that bash skript:


#!/usr/bin/env bash

sed 's/variable \"nb_instances\" {
  description = \"Specify the number of vm instances\"
  default     = \"3\"
}/variable \"nb_instances\" {
  description = \"Specify the number of vm instances\"
  default     = \"4\"
}/g' var.tf

but it doesn´t work and gives an error:

sed: 1: "s/variable \"nb_instanc ...": unterminated substitute pattern

Can anyone help me with that? I also tried to include \n for the new lines.

Upvotes: 0

Views: 56

Answers (1)

potong
potong

Reputation: 58568

This might work for you (GNU sed):

sed '/^variable "nb_instances" {/{:a;n;s/"3"/"4"/;Ta}' file

Focus on the first line beginning variable "nb_instances" { then continue reading/printing lines until the string "3" is replaced by "4".

Upvotes: 1

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