sed command to replace string beginning with spaces and “ssid” but not “scan_ssid”?

Question

I'm trying to replace a string in a config file that may have some extra spaces at the beginning without picking up another line.

network={
  scan_ssid=1
  ssid="My SSID can contain *any* char!"
  psk="6876876868"
  key_mgmt=WPA-PSK
}

The problem is the leading space(s) and the scan_ssid are conflicting any expression I try. I need to match any number of spaces but not any chars.

Everything I've tried changes both ssid and scan_ssid

Answer 1

试试这个简单的sed ：

sed 's/^[[:blank:]]*ssid=.*/replacement/' data