Question

I have one variable var1=’common_location/specific_location_1/common_filename_text’ now I have to get a new variable var2=’common_location/specific_location_2/common_filename_text’.
How can I do it in a linux shell. I am novice in shell scripting. So please explain assuming I know a very little.

Answer 1

Use that:

var2=${var1/1/2}

where var1 is variable with /specific_location_1/common_filename_text stored in it.
Below you can see that var1 and var2 differs only with one symbol

var1='common_location/specific_location_1/common_filename_text'
var2='common_location/specific_location_2/common_filename_text'

So we need just to substitute 1 to 2 and get new variable you need.
You can do it with :

var2=${var1/1/2}

Pretty easy.