sshvbox - interactive SSH access to running VirtualBox machines

I used to use a lot of running virtual machines simultaneously in VirtualBox.
Some of them are used for jenkins, others for testing some functionality. Anyway, I always have at least 2, and usually more, machines in running state.

To ease SSH access to them, I configured NAT port forwarding so I need to remember port number.

But keeping in mind all ports is not useful - it would be much more convenient to just choose machine and run inside.

So, using VBoxManage utility I wrote script which works exactly as explained:

    $ sshvbox
     1) "CentOS 5" {5f877c2e-14a8-4aee-a467-8d9c369b2aec} <52222>
     2) "SLES11" {c99f57bf-3a70-4c75-afbb-36f60b493865} <2200>
     3) "Hortonworks Sandbox 1.3" {6d0fda26-d42c-4ab2-9838-a02a8ed081c9} <2222>
    select> 1     
    root@localhost's password:
    Last login: Fri Jul  5 13:20:28 2013 from 10.0.2.2
    [root@vagrant-centos-5 ~]#


on github: https://github.com/rrader/sshvbox

C-style loops in Bash

Just found out it's possible to use C-style loops in bash, for example:

    for ((i=0; i<10; i++)); do
      echo $i;
    done

General form:

    for (( expr1 ; expr2 ; expr3 )) ; do list ; done

It's extremely useful, and this feature works on bash>=2.04, so it has to work on most environments.

more info: http://www.softpanorama.org/Scripting/Shellorama/Control_structures/loops.shtml#C_style_for_loop

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https://coderwall.com/p/fomutw