Command line interface Introduction
Digi CM User Guide 147
Introduction
The Digi CM unit runs the embedded Hard Hat Linux operating system. The command line interface
for configuration purposes is accessible only by the root user. The system administrator has read
only privileges from the command line. By default the root user is connected to the CLI (command
line interface) when accessing the Digi CM unit through Telnet or SSH. To gain access to the
command prompt, the root user uses the username root and the root password. The default root
password is dbps.
This chapter includes the Linux commands available on the embedded Linux operating system and
the location of files useful to the root user for administrative purposes.
Note The root user should be aware that deleting or corrupting files may prevent the Digi CM unit
from booting properly. Before editing any files, be sure to back up your configuration files.
Linux commands
The purpose of this section is to list the various Linux commands available on the Digi CM unit. This
is simply a listing of commands and does not detail what the commands do or give their particular
parameters. If you need more information, see the man pages on a Linux system.
Two commands that are very important for saving and applying changes to the configuration files
are:
▪ saveconf: The saveconf command saves the configuration files to flash memory.
▪ applyconf: The applyconf command immediately applies the configuration changes.
The configuration files are located in /tmp/cnf directory.
Two system utility menus that are important for accessing and configuring the Digi CM unit and the
serial ports are the portaccessmenu and configmenu.
▪ portaccessmenu: This menu allows the user to access the serial ports on the Digi CM unit.
▪ configmenu: This menu enables the system administrator to configure the Digi CM unit. It has
essentially the same functionality as the web interface for configuring a unit with the exception
of the ability to create custom menus.
▪ portreset #: This command allows the user to reset a specific port. It restarts all processes
associated with the port.
Shell and shell utilities
sh ash bash echo sed
env false grep more which
pwd
File and disk utilities
ls cp mv rm mkdir
rmdir ln mknod chmod touch
sync gunzip gzip zcat tar
dd df du find cat
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