After rooting my HTC ONE V, I was exploring android linux and found that most of day to day linux commands are not available.
For android linux commands visit :
Binary files which we require are present inside : "/system/bin" but found that most common commands like
uname, vim like editors powerful command like grep nothing was available and as a coder and a pen-tester we definitely need it, and found a good tool called "BusyBox" freely available on google play
|Busy Box Installation|
Once you install busybox all required commands will be installed at "/system/bin" directory on your android phone.
|After Busy Box Installation|
So with gr8 set of commands you can explorer your android phone, create your scripts etc.