usage.txt

In order for this script to work you need to install it in some directory (for example /usr/local/bin).
And then create 5 symlinks to it:
1. ln -s /usr/local/bin/multy-command.sh /usr/local/bin/sexec
2. ln -s /usr/local/bin/multy-command.sh /usr/local/bin/mexec
3. ln -s /usr/local/bin/multy-command.sh /usr/local/bin/fexec
4. ln -s /usr/local/bin/multy-command.sh /usr/local/bin/scopy
5. ln -s /usr/local/bin/multy-command.sh /usr/local/bin/mcopy

This present us with 5 different commands residing in one single script. This way we can easly change
all the commands at once.

Some information about the commands:

sexec - Sequential execution of a certain command on all servers from $server_list
mexec - parallel execution of a certain command on all servers from $server_list performed in background
fexec - parallel execution of a certain command on all servers from $server_list performed in background
but print the output with the hostname of every machine, so we can get better ordered output
scopy - Sequential copy of a certain file to all servers from $server_list, this is usefull for files
bigger then 2-3MB
mcopy - parallel copy of a certain file to all server from $server_list, this is usefull for transfering
configuration files and archives under 2MB


The mexec and sexec commands can also be used to execute local scripts on the remote servers:
  Usage: $0 command|- script_file
  The - script_file option can be used only with mexec and sexec.
  Examples:
      $0 - script.sh

So all *exec commands can be used with a command as:
      $0 'cp /etc/exim.conf /etc/exim.old'

But only sexec and mexec can be used with scripts like:
      $0 - script.sh

The copy commands can be used as:
  Usage: $0 local_file remote_destination
  Example:
      $0 test.sh /usr/local/sbin


If you specify a file in the SERVER_LIST environment variable, the contents of that file will be used as the server list.
If you specify a number in the BACKGROUND_SLEEP_TIME environment variable, that number will be used to wait for s/m/fexec commands, before producing the server status information.