Table of contents

‘vi’ and 'vim' text editors

Notes:

• When typing text, press <ESC> once finished. In case you’re blocked, press also <ESC> before executing commands described below
• both editors use case sensitive commands

'vim' has also a graphical version named 'gvim'. If not installed, you can run: # yum -y install gvim

‘gedit’ graphical editor

‘gedit’ is a graphical text editor, users familiar with Windows notepad should not encounter difficulties to use it.

‘nano’ text editor

‘nano’ is a basic text editor, very simple to use and displaying available commands at the bottom of the screen. For example, to leave ‘nano’ , use ^X (press CTRL + X)

How to setup ‘ssh’ trusts between Linux and HP-UX

Please note:

• The prompts will tell you where to execute the commands, "HPUX#" (root user) or "Linux#"  (root user)
• Remember Linux/Unix is case sensitive
• If hosts are not known by each other, fill the /etc/hosts file for example (using vi for example)
• linuxhost represents the name of your Charon server (can be any name you want)
• hpuxhost represents the hostname of your HP-UX virtual machine

On the HP-UX system, enter the following commands if the folder does not already exist:

On the Linux server, enter:

On the HP-UX system, add the Linux server key to the authorized keys:

Perform a simple test on the Linux server:

If trying to execute a remote command on the HP-UX system, a message telling "no matching cipher found" is displayed, the cipher has to be setup on the Linux server side in the /root/.ssh/config file:

How to install 'rsh' on RHEL 8

How to setup ‘rsh’ trusts between Linux and HP-UX

Please note:

• The prompts will tell you where to execute the commands, "HPUX#" (root user) or "Linux#"  (root user)
• Remember Linux/Unix is case sensitive
• If hosts are not known by each other, fill the /etc/hosts file for example (using vi for example)
• linuxhost represents the name of your Charon server (can be any name you want)
• hpuxhost represents the hostname of your HP-UX virtual machine

Introduction

RSH executes commands on a remote host. It can be used to issue a shutdown on the Charon Tru64 virtual machine.

Pre-requisites

The RSH method requires the 'rsh' package. It can be installed using the following command:

Notes

On the HP-UX system issuing the shutdown, create a proxy between the root user of the Charon server and the user.

Example:

If the Charon server name is not known to the TCPIP database, edit the /etc/hosts file and add the server ip address and its name.

Ensure manual commands can be passed to the HP-UX system from the Charon server.

Example:

If a "poll: protocol failure in circuit setup" is returned, the firewall settings have to be set to open ports 1011 to 1023.

Please always refer to your network administrator when changing the firewall rules, commands below are given as example only.

Example:

Shutdown guests with Expect tool

Introduction

In case SSH nor RSH can not be used to perform clean shutdown of the guests, the "expect" tool can be used to connect to the console, perform the login operation and execute the shutdown command depending on the console status.

The operations performed during the "expect" script execution are detailed in the VM management - Create/Edit guest stop script chapter.

 In this case the password is sent without encryption.

To facilitate use of "expect" for shutdown, an example is provided in the "guest_shutdown.exp" script located in the /opt/charon/utils folder. If you plan to customize the script, you'll have to create a copy and not use it directly as it will be overwritten in case of Toolkit upgrade.

Please note:

'telnet' and 'expect' packages must be installed in order to use this feature.

The following error message can be returned when stopping the virtual machine when trying to use the expect script example:

• if expect package is not installed: "Stop script returned error code 126".
• if telnet is not installed: "%EXPECT-F-NOSRM, Cannot continue, 'telnet' is not installed" then "Stop script returned error code 4"

Caution: the virtual machine process will be however killed by service management process.

If console is locked:

Any active session to the console must be killed before the "expect" script is executed.

For example, if you are connected via "telnet" on the localhost/port (the kill is not done inside the expect script). Using the "/opt/charon/utils/charon_gstart_expect" script file the necessary operations will be performed.

If the console is locked from another host (if you use putty for example), you will have to cancel the connection by yourself otherwise the shutdown will not be performed cleanly.

Script usage

Usage:

# path/script <port> <user> <password> <prompt> <opsys>

Parameters:

Example for HP-UX:

Example for MPEIX:

How to restart CHARON-PAR on Linux automatically on failure

Automatic restart on failure is managed by systemd at Linux level, please refer to systemd man pages.

For example, edit the service configuration file and add the following parameters: