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Appendix A Linux Commands & Source Code
The console server platform is a dedicated Linux computer, optimized to provide monitoring and secure
access to serial and network consoles of critical server systems and their supporting power and
networking infrastructure.
Black Box console servers are built on the 2.4 uCLinux kernel as developed by the uCLinux project. This is
GPL code and source can be found at http://cvs.uclinux.org. Some uCLinux commands have config files
that can be altered (e.g. portmanager, inetd, init, ssh/sshd/scp/sshkeygen, ucd-snmpd, samba, fnord,
sslwrap). Other commands you can run and do neat stuff with (e.g. loopback, bash (shell), ftp, hwclock,
iproute, iptables, netcat, ifconfig, mii-tool, netstat, route, ping, portmap, pppd, routed, setserial,
smtpclient, stty, stunel, tcpdump, tftp, tip, traceroute)
Below are most of the standard uCLinux and BusyBox commands (and some custom Black Box
commands) that are in the default build tree. The Administrator can use these to configure the console
server, and monitor and manage attached serial console and host devices:
addgroup *
Add a group or add an user to a group
adduser *
Add an user
agetty
alternative Linux getty
arp
Manipulate the system ARP cache
arping
Send ARP requests/replies
bash
GNU Bourne-Again Shell
busybox
Swiss army knife of embedded Linux commands
cat *
Concatenate FILE(s) and print them to stdout
chat
Useful for interacting with a modem connected to stdin/stdout
chgrp *
Change file access permissions
chmod *
Change file access permissions
chown *
Change file owner and group
config
Black Box tool to manipulate and query the system configuration from the
command line
cp *
Copy files and directories
date *
Print or set the system date and time
dd *
Convert and copy a file
deluser *
Delete USER from the system
df *
Report filesystem disk space usage
dhcpd
Dynamic Host Configuration Protocol server
discard
Network utility that listens on the discard port
dmesg *
Print or control the kernel ring buffer
echo *
Print the specified ARGs to stdout
erase
Tool for erasing MTD partitions
eraseall
Tool for erasing entire MTD partitions
false *
Do nothing, unsuccessful
find
Search for files
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