第 7 章 Using the command-line assistant to debug or troubleshoot system issues

Procedure

1. Check the SSHD status and restart it.

   $ sudo systemctl status ssh
   $ sudo systemctl restart ssh

2. Enable the optional command-line assistant terminal capture feature:

   $ c shell --enable-capture

3. Use the -w 1 "your_question" option to specify to include the output from the last command that was run.

   $ c -w 1 "what_is_this"

   • If you specify the number 2, that references the output from the second-to-last command. This is also true for the additional numbers.

   • You can also specify a prompt to run with the command and ask "help me understand the output", and reference the output with the error, so that the command-line assistant understands that you are asking for more details on what the error is.

     The command-line assistant processes the request and provides several possible solutions. In the example, you can use the suggestion to run the journalctl -xeu sshd.service command to check the log files.

4. Run that journalctl command and check the log files to identify potential issues.

   $ journalctl -xeu sshd.service

5. Ask the command-line assistant to generate a command on how to fix this typing error.

   $ c "what is the command that I can use to change 'Porrt' to 'Port' in the /etc/ssh/sshd_config file?"

6. Run the command suggested by the command-line assistant as a sudo user. For example:

   $ sudo sed -i s/Porrt/Port/g /etc/ssh/sshd_config