sys-unconfig is a reconfiguration command. The command execution process is an initialization process. The command is described as follows:
sys-unconfig - undo a system's configuration
The sys-unconfig command is used to restore a system's configuration to an "as-manufactured" state, ready to be reconfigured again. The system's configuration consists of host name, network information service (NIS) domain name, timezone, IP address, IP subnet mask, and root password.
This operation is the inverse of those performed by the sysidnet(1M), sysidns(1M), and sysidsys(1M) programs run at boot. See sysidtool(1M).
The functions of the sys-unconfig command are described in the manual.
The sys-unconfig command has the following functions:
o Saves current /etc/inet/hosts file information in /etc/inet/hosts.saved.
o If the current /etc/vfstab file contains NFS mount entries, saves the /etc/vfstab file to /etc/vfstab.orig.
o Restores the default /etc/inet/hosts file.
o Removes the default hostname in /etc/hostname.interface files for all interfaces configured when this command is run. To determine which interfaces are configured, run the command 'ifconfig-a'. The /etc/hostname.interface files corresponding to all of the interfaces listed in the resulting output, with the exception of the loopback interface (lo0), will be removed.
o Removes the defaultdomainname in /etc/defaultdomain.
o Restores the timezone to PST8PDT in /etc/TIMEZONE.
o Disables the network information service (NIS) and network information service plus (NIS+) if either NIS or NIS+ was configured.
o Removes the file /etc/inet/netmasks.
o Removes the file /etc/defaultrouter.
o Removes the password set for user root in /etc/shadow.
o Removes the file /etc/.rootkey.
o Executes all system configuration applications.
These applications are defined by prior executions of a sysidconfig -a application. (See sysidconfig(1M)). When sys-unconfig is run, all system configuration applications are passed one argument, -u.
o Removes the file /etc/resolv.conf.
o Removes the file /etc/sysidcfg.
o Disables LDAP by removing /var/ldap/ldap_client_cache, /var/ldap/ldap_client_file, /var/ldap/ldap_client_cred, /var/ldap/cachemgr.log.
o Regenerates keys for sshd(1M).
When sys-unconfig is finished, it performs a system shutdown. sys-unconfig is a potentially dangerous utility and can only be run by the super user.
The sys-unconfig command can cause severe consequences. It is not recommended that you use the command rashly. If you need to change the system network address, it is recommended that you change the system network address in the MSuite and restart the system. In this manner, relevant files in the system are changed accordingly and the normal start of the database is not affected.