Envsubst - Revision history

Busk: Created page with "Use bash to replace variables in host https://serverfault.com/questions/287688/templating-with-linux-in-a-shell-script ``` Example template file apache.tmpl:
2021-09-15T11:49:43Z

Created page with "Use bash to replace variables in host https://serverfault.com/questions/287688/templating-with-linux-in-a-shell-script ``` Example template file apache.tmpl: <VirtualHost ..."

New page
Use bash to replace variables in host

https://serverfault.com/questions/287688/templating-with-linux-in-a-shell-script

```
Example template file apache.tmpl:

<VirtualHost :${PORT}>
ServerName ${SERVER_NAME}
ServerAlias ${SERVER_ALIAS}
DocumentRoot "${DOCUMENT_ROOT}"
</VirtualHost>
Run envsubst and output result to new file my_apache_site.conf:

export PORT="443"
export SERVER_NAME="example.com"
export SERVER_ALIAS="www.example.com"
export DOCUMENT_ROOT="/var/www/html/"
envsubst < apache.tmpl > my_apache_site.conf
Output:

<VirtualHost *:443>
ServerName example.com
ServerAlias www.example.com
DocumentRoot "/var/www/html/"
</VirtualHost>
```