Black Box LES301A-KIT Manuel d'utilisateur télécharger pdf (Page 17)

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Page 17

Linux Virtual COM user manual

Using TTYredirector/Troubleshooting

3 The command has been rejected by the TTYredirector daemon. An example is setting a user permission for a user that doesn't

exist.

4 The command program is unable to communicate with the ttyredirectord daemon.

Troubleshooting

1. Tracing TTY Activity

The trtrace command displays the activity of TTYredirector TTY devices.

Initiating tracing

trtrace

Displays trace data to stdout.

trtrace -outputfile file

trtrace -f file

Writes trace data to file, replacing the file if it exists.

If file is preceded by a “+”, the output is appended to file.

If file is “-”, output is send to stdout.

Multiple -outputfile options are permitted. A copy of trtrace ouput will be written to each file.

Example 1:

trtrace -outputfile trace.txt -outputfile -

writes output both to the trace.txt and stdout.

Example 2:

trtrace -f +history.txt -f current.txt

appends output to history.txt and writes to a new file current.txt.

2. Messages in Syslog

The TTYredirector daemon emits error and information messages to the operating system's syslog facility. Each message is tagged

with “ttyredir” and either “ERROR” or “INFO” depending on the nature of the message.

Events that result in syslog messages include:

• Daemon startup and shutdown

• Errors in creating or opening a TTY device

• License conflicts

• Invalid or missing license key

• Maximum number of licensed TTYs exceeded

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Black Box LES301A-KIT Manuel d'utilisateur Page 17