Lenovo RD220 User Guide - Page 83

Utility commands, exit command, Description, help command

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v In the command-line interface, the output buffer limit is 2 KB. There is no buffering. The output of an individual command cannot exceed 2048 characters. This limit does not apply in serial redirect mode (the data is buffered during serial redirect). v The output of a command is displayed on the screen after the command has completed execution. This makes it impossible for commands to report real-time execution status. For example, in the verbose mode of the flashing command, the flashing progress is not shown in real time. It is shown after the command completes execution. v Simple text messages are used to denote command execution status, as in the following example: system> power on ok system> power state Power: On State: System power off/State unknown system> v The command syntax is case sensitive. v There must be at least one space between an option and its argument. For example, ifconfig eth0 -i192.168.70.133 is incorrect syntax. The correct syntax is ifconfig eth0 -i 192.168.70.133. v All commands have the -h, -help, and ? options, which give syntax help. All of the following examples will give the same result: system> power -h system> power -help system> power ? v Some of the commands that are described in the following sections might not be available. To see a list of the commands that are supported, use the help or ? option, as shown in the following examples: system> help system> ? Utility commands The utility commands are as follows: v exit v help v history exit command Description Use the exit command to log off and end the command-line interface session. help command Description Use the help command to display a list of all commands with a short description for each. You can also type ? at the command prompt. Chapter 7. Command-line interface 77

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v
In the command-line interface, the output buffer limit is 2 KB. There is no
buffering. The output of an individual command cannot exceed 2048 characters.
This limit does not apply in serial redirect mode (the data is buffered during
serial redirect).
v
The output of a command is displayed on the screen after the command has
completed execution. This makes it impossible for commands to report real-time
execution status. For example, in the verbose mode of the
flashing
command,
the flashing progress is not shown in real time. It is shown after the command
completes execution.
v
Simple text messages are used to denote command execution status, as in the
following example:
system> power on
ok
system> power state
Power: On
State: System power off/State unknown
system>
v
The command syntax is case sensitive.
v
There must be at least one space between an option and its argument. For
example,
ifconfig eth0 -i192.168.70.133
is incorrect syntax. The correct
syntax is
ifconfig eth0 -i 192.168.70.133
.
v
All commands have the
-h, -help
, and
?
options, which give syntax help. All of
the following examples will give the same result:
system> power -h
system> power -help
system> power ?
v
Some of the commands that are described in the following sections might not be
available. To see a list of the commands that are supported, use the help or ?
option, as shown in the following examples:
system> help
system> ?
Utility commands
The utility commands are as follows:
v
exit
v
help
v
history
exit command
Description
Use the
exit
command to log off and end the command-line interface session.
help command
Description
Use the
help
command to display a list of all commands with a short description
for each. You can also type
?
at the command prompt.
Chapter 7. Command-line interface
77