The **configure/CONFIG_SITE.local** file is used to specify local configuration settings for building an EPICS IOC. By setting ``LINUX_NET_INSTALLED`` to ``NO``, you are disabling the use of the "libnet" library by telling the build system that this library is not installed on your system, which was causing the linker errors.
The IOC build system will now use an alternative networking library instead of libnet, allowing the IOC to be built without requiring the installation of the "libnet" library.
**Note:** the linux command ``$ echo "LINUX_NET_INSTALLED = NO" > configure/CONFIG_SITE.local`` writes the text "LINUX_NET_INSTALLED = NO" to the **configureCONFIG_SITE.local** file. If the file does not exist, the ``>`` sign creates the file and writes the output to it. If the file already exists, the ``>`` sign overwrites its contents with the new output.
