Before dstool installation begins the ultimate configuration of dstool must be selected. The essential difference between the single-user and multi-user configurations is where the bulk of the dstool object code resides -- either in a private directory owned by a single user or in a public directory, accessible by a number of different users. The selection typically depends on both access and space requirements. Once the choice between single-user and multi-user configurations is made, a subdirectory can be created to hold the dstool software and appropriate changes can be made to the user's working environment.
In the following discussion, examples are shown for making changes to the user's working environment. We assume from now on that the user is operating under the C-Shell UNIX environment -- modifications are made by editing the .login and .cshrc files contained in the user's home directory. If, instead, the user is operating under the Bourne shell, the corresponding files are named .login and .profile. Refer to the UNIX manual to find how the environmental variables are defined in the Bourne shell.