Installation guide
commands and tools are the same or similar on the two systems. For
information about the differences that do exist between the DIGITAL
UNIX and ULTRIX user environments, see Chapter 2.
The following list describes the major tasks involved in migrating from an
ULTRIX to a DIGITAL UNIX system:
• Using commands
Most commands are similar on the DIGITAL UNIX and ULTRIX
systems. For a list of specific differences between commands, see
Appendix A.
• Using shells
You should notice few differences in how the shell you use operates. You
might need to modify shell scripts to use them on a DIGITAL UNIX
system. For information about porting shell scripts, see Section 3.2.
• Setting environment variables
You might need to set the PATH, filec, or international environment
variables on your DIGITAL UNIX system. For information about
setting these environment variables, see Section 3.1.
1.4.2 Migrating Your System and Network Administration
Environment
The system and network administration tasks on both systems are similar.
Many of the commands, setup scripts, and utilities you use on an ULTRIX
system are available on a DIGITAL UNIX system. The following list
describes some of the tasks you might need to perform on a DIGITAL
UNIX system as you migrate from an ULTRIX system:
• Mount ULTRIX file systems on a DIGITAL UNIX system (as described
in Section 5.1).
• Read information from tape archives by using the DIGITAL UNIX tar
command (as described in Section 5.3).
• Add devices to your system after you configure the system (as described
in Section 5.4).
• Configure daemons for ULTRIX compatibility (as described in
Section 5.7 and Section 5.8).
1.4.3 Migrating Your Application
You can migrate an application from an ULTRIX to a DIGITAL UNIX
system in one of two ways: either as source code (recommended) or as
executable code, as described in the following sections. If the source code is
1–10 Introduction to Migrating from ULTRIX to DIGITAL UNIX Systems