Issue
I am looking to replace the line export KEY_COUNTRY="US" with the data read in the variable $COUNTRY in the file /etc/openvpn/easy-rsa/vars
In my previous builds which I used with CentOS6, i used the command replace which is bundled with mysql-server. But now that function is no longer available, i am looking for ideas on alternate command to replace the data.
Thanks in advance.
Solution
You can use sed, but keep in mind that it can fail if $COUNTRY contrains control characters.
sed -i 's/KEY_COUNTRY="US"/KEY_COUNTRY="'"$COUNTRY"'"/' file
Using Perl would be safer, as it doesn't interpret variable contents as part of the syntax:
perl -i -pe 's/KEY_COUNTRY="US"/KEY_COUNTRY="$ENV{COUNTRY}"/' -- file
$COUNTRY must be accessible in the perl process, i.e. you need to export it or assign to it
COUNTRY=$COUNTRY perl ...
Answered By - choroba Answer Checked By - Willingham (WPSolving Volunteer)