Bash, appending text to the end of a variable?

2018-06-09 17:48:03

This question already has an answer here:

How to concatenate string variables in Bash 27 answers

Append like:

file="${file}ins.b"

If you don't use braces then it treats fileins as a variable and expands it. Since, it's probably not set it just prints .b .

Related: When do we need curly braces in variables using Bash?

In bash you can also reference variables like ${file} . So this should work for you:

file="${file}ins.b"

You don't need to expand the old value at all; bash has a += operator:

file+="ins.b"

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