update docs

docs/10_Introduction

@@ -3,6 +3,8 @@
 Multi SSH shellscript written in Bash to execute a single command on one or many target hosts via ssh.
 A target host can define a jumphost if it is not accessible directly.
 
+The initial purpose was to make system updates on many servers with a visualisation which server was updated successfully / already and which not.
+
 The script is designed to run in interactive mode but supports a few command line parameters for scripting too.
 
 In a server configuration file you can put your servers. Each server can have

docs/40_Usage.md

@@ -20,6 +20,20 @@ Server list:
 * last success - timestamp of the last execution of the set command with exitcode 0. If the field is empty the command was not executed yet. This field helps you to see if a command was executed on all servers alreadyor not.
 * Running - Info for curently running job or fisnished job and the terminal window is still open. If it is empty then the job is not running
 
+```txt
+        Server                                    Bastion (20 chars)           last success  Running
+     1  www.example.com                                                                       
+     2  db.example.com
+     :
+
+Special commands:
+ ':c' change command hostname -f 
+ ':t' change tags    tue 
+ ':p' change profile iml 
+Enter numbers or parts of servernames. Use space as divider.
+Just press return to update server infos amd running status.
+> 
+```
 
 Behind the prompt you can type an action and press Return.
 
@@ -71,9 +85,63 @@ Mark it with the mouse and paste it with middle mouse key.
 
 In the menu enter a single number - or multiple numbers separated by space.
 
+#### Prepare
+
 The current commad will be started on the given host in an extra terminal window.
+The terminal to open can be configured, eg gnome-terminal or konsole.
+
+see ../config/userconfig.sh - `export MRE_TERMINAL=<appname>`
+
+A given ssh user will connect to the target host. 
+
+see ../config/userconfig.sh - `export MRE_SSHUSER=<sshuser>`
+
+#### Execute
+
+When the terminal window started you see starting time, the executed statement followed by the output of the command.
+
+As long the command is running you will see `TERM` in the server list.
+
+```text
+>>>>> List of servers - Fri Nov  1 13:13:55 CET 2024 
+
+        Server                                    Bastion (20 chars)           last success  Running
+     1  www.example.com                                                                       TERM
+     2  db.example.com
+```
+
+#### On finish
+
+If the command is finished you get a line with finishing time and command.
+In the last line you see 
+
+* "OK" on exitcode 0
+* "ERROR" on non zero exitcode
+
+The finished execution is tracked in `logs/returncodes.log`
+
+If the command is `hostname -f`to be executed on www.example.com:
+
+```text
+Fri Nov 1 13:13:49 CET 2024 START ssh admin@www.example.com hostname -f ...
+_______________________________________________________________________________
+
+www.example.com
+_______________________________________________________________________________
+Fri Nov 1 13:13:49 CET 2024 END ssh admin@www.example.com hostname -f
+>>> OK >>>   Press RETURN to exit
+```
+
+In the server list a successful execution is shown:
+
+```text
+>>>>> List of servers - Fri Nov  1 13:14:09 CET 2024 
+
+        Server                                    Bastion (20 chars)           last success  Running
+     1  www.example.com                                                             13:13:49
+     2  db.example.com
+```
 
-see ../config/userconfig.sh - `export MRE_TERMINAL=gnome-terminal`
 
 ## CLI usage