SIMS 3.5 installation automatically diagnoses the host name to determine whether the name returned is a fully-qualified domain name, but somehow cannot be accessed.The following are the steps that SIMS Installation takes.
| 1. | The procedure makes a function call to gethostbyname(), which in turn uses the file nsswitch.conf to check the host name. | |
| 2. | If the lookup results in a fully-qualified domain name, the installation proceeds; otherwise, it runs the SIMS DNS lookup utility. This utility directly accesses the Internet Domain Name Server. | |
| 3. | The SIMS DNS lookup utility, in turn, uses the file resolv.conf and directly queries the Internet Domain Name Servers. | |
| 4. | If the SIMS DNS lookup utility cannot find the DNS name in the system, it displays an error message and exits. | |
| 5. | If, however, the SIMS DNS lookup utility finds the DNS name in the system, it further searches to check whether the name is a fully-qualified domain name. | |
| 6. | If the SIMS DNS lookup utility finds a DNS name that is not a fully-qualified name, it displays a message indicating that the Administrator needs to configure the DNS on the machine correctly before installing. | |
| 7. | If the SIMS DNS lookup utility concludes that the name it found is a fully-qualified domain name, it displays a message indicating that the name is good, but cannot be accessed. It then suggests that you check the file nsswitch.conf for the search order for hosts or the /etc/hosts files if this file is being used. |
FIGURE 10-1 shows the steps that SIMS 3.5 installation takes to check for a fully-qualified domain name.