Linux delete lines from ini-file where key has no value

Question

I have a config file with different values formatted like this:
[Global]

control_ip =
control_port =
control_socket = /run/tipper.sock
control_pass =

Now I just want to delete the lines that have no value after =, of course without deleting the [Global] section header.

αғsнιη · Accepted Answer

sed '/=s*$/d' infile

or
sed '/=[[:blank:]]*$/d' infile

delete those lines that ends with = followed by zero-or-more whitespaces.

Using awk and preserve the empty lines:
awk -F'[=t ]' '$NF!="" || /^$/' infile

or
awk -F'=[[:blank:]]*' '$NF!="" || /^$/' infile

One Answer