using isql to database on remote Linux server

>isql
SQL> CONNECT “hostname:/one/two/employee.fdb”
user ‘sysdba’ password ‘masterkey’;
You can also specify all parameters in one line:
isql -u sysdba -p masterkey “hostname:/one/two/employee.fdb”

If you are tired of typing the whole path you can set up an alias:
Open a file named
“aliases.conf” and add an alias for
each of your databases, every alias consists of a line like:
employee = /one/two/employee.fdb
So the connection string above will evolve into:
SQL> CONNECT “hostname:employee” user ‘sysdba’ password ‘masterkey’;