The following steps will install full text search in SQL Server on Red Hat Enterprise Linux platform. Full-Text Search enables you to run full-text queries against character-based data in SQL Server tables. for more details, you can refer here.

sudo yum install -y mssql-server-fts

If full text search package(mssql-server-fts) is already installed on Linux machine, then you can update to the latest version with the following commands:

sudo yum check-update
sudo yum update mssql-server-fts

Once full text search feature is enabled. You can verify using following command.

SELECT SERVERPROPERTY('IsFullTextInstalled') as Full_Text_Search_Status;
GO