So I’m working on a Ubuntu Docker image and have to replace a settng in a file using sed.
I’d like to change #$nrconf{restart} = 'i' into $nrconf{restart} = 'a'
The way I understand it is that I have to escape ', $, {, }. I then tried it using this sed command (tried with and without escaping #)
sed -i 's/#\$nrconf\{restart\}[[:space:]]=[[:space:]]\'i\'/\$nrconf\{restart\}[[:space:]]=[[:space:]]\'a\'/g' /etc/needrestart/needrestart.conf
But when I test the command it expects an input and when I run the command in a Docker image I get this error Syntax error: Unterminated quoted string
What am I missing? I think escaping the quotes is correct, I don’t get it
>Solution :
Using sed
$ sed -E "s/^#($nrconf[^']*')[^']*/\1a/" input_file
$nrconf{restart} = 'a'