====== rc, ed, network configuration ======

===== rc: the  Plan 9 shell =====

    * **ctl-h** is backspace, kind of; **ctl-u** erases the current line. As seen, with the VPS Plan 9 console prompt **ctl-h** backspace, the screen output may not be what one would expect (([[http://sdf.org/?tutorials/Plan_9_rc|Control keys]] – Available at the SDF Boot Camp VPS server console prompt)).
    * To detach the Plan 9 console prompt (%), while retaining the ability to reattach it __without__ rebooting your server, press **ctl-]** to close the prompt (%). Then, press ‘**q**’ to disconnect the VPS Maintenance Shell menu, and ssh connection. You can return again with another [[:plan9front_-_plan_9_instance_under_xen#default_pre-generated_installation|ssh]] to the allocated VPS server, an SDF VPS Maintenance Shell menu review, and a press on the “**c**” key to connect to the Plan 9 console prompt (%).
    * //**ed**// and “''% sam -d''” are available in the Plan 9 Image. They may be used for setting the DNS, or other tasks from the Plan 9 VPS console prompt (%), before Drawterm is accessible. An [[http://sdf.org/?tutorials/ed | ed cheat-sheet]] is available. Additional editors are operational from a [[:plan9front_-_drawterm_rio_and_stats#drawterm|Drawterm]] Rio rc prompt: acme, [[:plan9front_-_acme_sam_abaco_mothra_and_man#sam|sam]], or ''% sam -d''.

|% [[:plan9front_-_acme_sam_abaco_mothra_and_man#sam|sam -d]]| Editing will be done with the command language only, as in //ed//.|

=== Configuring a dynamic prompt ===

To have a prompt that shows your [[plan9front_-_fn_reply_and_prompt#prompt|pwd and user name]], add the following lines to your lib/profile. Place them in the ‘case cpu’ section, replacing the cpu% prompt line.

<code>

prompt=('['^`{pwd}^'] '^$sysname^'% ' ' ')
fn cd {builtin cd $* && prompt=('['^`{pwd}^'] '^$sysname^'% ' ' ')}
</code>

These lines update the prompt, and replace the ‘cd’ command so that the prompt is updated each time you change a directory.

===== ed =====

Ed is a text editor, and similar to [[:plan9front_-_acme_sam_abaco_mothra_and_man#sam|sam -d]]. Using the ''% sam -d'' examples from [[:plan9front_-_acme_sam_abaco_mothra_and_man#sam|Sam]], it's possible to use ''% ed''. The mentioned examples are from a Drawterm Rio rc prompt.

<code>

  % cd samtest
  % cp /lib/ndb/local local-1ed
</code>

<code>

  % ed local-1ed
  291
  /ip=
  ip=127.0.0.1 sys=localhost dom=localhost
  s/ip=/#ip=
  #ip=127.0.0.1 sys=localhost dom=localhost
  $
  #ip=127.0.0.1 sys=localhost dom=localhost
  a
  ip=YOUR_IP sys=plan9 dom=plan9 dns=205.166.94.20
  .
  w
  341
  q
  %
</code>

<code>

  % cp /rc/bin/termrc.local termrc.local-1ed
  % ed termrc.local-1ed
</code>

<code>

  % ed termrc.local-1ed
  424
  $
  cpu=CP
  a
  ip/ipconfig -g 205.166.94.1 ether /net/ether0 YOUR_IP 255.255.255.0
  ndb/cs
  ndb/dns -r
  .
  w
  510
  q
  %
</code>

^Command^ Title^ Quick Reference^
|ED|ed Cheat Sheet|http://sdf.org/?tutorials/ed|

=== network configuration ===

| [[http://sdf.org/?tutorials/Plan_9_rc|Control keys]] – Available at the SDF Boot Camp VPS server console prompt |

Editor reference:

|[[vps_-_9front#editors|Sam, Ed, Acme]]|''%%https://wiki.sdf.org/doku.php?id=vps_-_9front#editors%%''|

|Plan 9 Rc Survival Guide|http://sdf.org/?tutorials/Plan_9_rc|

===== research =====

|x|[[http://doc.cat-v.org/plan_9/2nd_edition/README.html|README]] (slightly outdated) //If you think of it as UNIX, you'll often be frustrated because something doesn't exist or works differently//. (external link)|
|x|[%%:!:%%] ((The [%%:!:%%] is interchangeable with a //[CAUTION]//, for the [[plan9front_-_acme_sam_abaco_mothra_and_man#abaco|abaco]], and [[plan9front_-_acme_sam_abaco_mothra_and_man#mothra|mothra]] browsers. :!:)) Opinion: //“Plan 9” is not a product, and is not intended to be. It is research – an experimental investigation into a different way of computing.//; //23/08/1988//; [[https://www.usenetarchives.com/view.php?id=comp.unix.wizards&mid=PDg0NkB5dW5leHVzLlVVQ1A%2B|Re: Plan 9?]] ((The ''comp.unix.wizards'' //Usenet Archives// link is a reference.)) (external link)|
|x|[%%:!:%%] ((The [%%:!:%%] is interchangeable with a //[CAUTION]//, for the [[plan9front_-_acme_sam_abaco_mothra_and_man#abaco|abaco]], and [[plan9front_-_acme_sam_abaco_mothra_and_man#mothra|mothra]] browsers. :!:)) //“[[plan9front_-_acme_sam_abaco_mothra_and_man#sam|sam]]” is basically a superset of the “jim” mouse-oriented editor, with a more extensive command language and many improvements.//; //14/03/1987//; [[https://www.usenetarchives.com/view.php?id=comp.unix.wizards&mid=PDQ5NTJAYnJsLWFkbS5BUlBBPg|DMD (Teletype 5620) software]] ((The ''comp.unix.wizards'' //Usenet Archives// link is a reference.)). [[https://man.cat-v.org/unix_8th/9/jim|jim - text editor]], [[wp>Blit_(computer_terminal)| Teletype DMD 5620]] (external link)|