Responding to the yet un-answered part of your OT query:
You can get the BASH version by: 
$ echo $BASH_VERSION
4.2.25(1)-release

# Just the Major version:
echo $BASH_VERSINFO
4

[download]
Another alternative: 
$ bash --version
GNU bash, version 4.2.25(1)-release (x86_64-pc-linux-gnu)
Copyright (C) 2011 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gp
+l.html>

This is free software; you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

[download]
or even: (Ctrl-x Ctrl-v) , which shows 
GNU bash, version 4.2.25(1)-release (x86_64-pc-linux-gnu)

[download]

        Software efficiency halves every 18 months, thus compensating for Moore's Law.

In reply to Re: OT: unable to use the options of echo in my shell terminal bash ofcourse by NetWallah
in thread OT: unable to use the options of echo in my shell terminal bash ofcourse by ramachandrajr

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