CODEWITHSUNDEEP
sed
showkey
showkey

Reputation: 290

why can't substitute with sed command?

I want to substitute all the string define('DB_NAME', 'name_here'); with define('DB_NAME', 'myname'); in the file wp-config.php.

x="define('DB_NAME', 'name_here');"
y="define('DB_NAME', 'myname');"
sed  -i 's/$x/$y/g'   wp-config.php

There is no error message in the console,but nothing happen.
How can i substitute all the string define('DB_NAME', 'name_here'); with define('DB_NAME', 'myname'); in the file wp-config.php?

Upvotes: 0

Views: 53

Answers (1)

Jotne
Jotne

Reputation: 41456

Its the single quote that makes the problem and make sed does not evaluate your variable. Use double quote around the sed code instead.

x="define('DB_NAME', 'name_here');"
y="define('DB_NAME', 'myname');"
sed  -i "s/$x/$y/g"   wp-config.php

PS to see what is going on, wait with -i to you see output is correct.

sed  "s/$x/$y/g" wp-config.php
define('DB_NAME', 'myname');

Upvotes: 2

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