.What are the differences between different shells in Linux: bash,csh,tcsh, etc. ?

[quaternion]

I am not sure is it proper place to ask but it seems to be like that.

1.What are the differences between different shells in Linux: bash,csh,tcsh,...

2.And what are the relations between these and different file types as :.#rc , .csh , .bash#

for example : I found all exist in the user folder when I try to set environmental variables

3.And when setting envir. variables which of these files shall be changed and which are relevant than the others ?

4. Are the answers to past questions platform dependent ?

Sorry; If my questions are repeated many here in the Liunx Software forum , but i am still lost and i am newbie in Linux.

 

[meitolake]

Re: Basic questions

https://www.gnu.org/software/bash/manual/bashref.html

 

[quaternion]

Re: Basic questions

Thanks a lot ,although it is long I was needing it ,although it helps to answer only my first question.