How do I concatenate strings in a bash script?

Question

How can I concatenate strings and variables in a shell script?

stringOne = "foo"

stringTwo = "anythingButBar"

stringThree = "? and ?"

I want to output "foo and anythingButBar"

Answer 1

Nothing special, you just need to add them to your declaration.

for example:

[Zypher@host01 monitor]$ stringOne="foo"
[Zypher@host01 monitor]$ stringTwo="anythingButBar"
[Zypher@host01 monitor]$ stringThree=$stringOne$stringTwo
[Zypher@host01 monitor]$ echo $stringThree 
fooanythingButBar

if you want the literal word 'and' between them:

[Zypher@host01 monitor]$ stringOne="foo"
[Zypher@host01 monitor]$ stringTwo="anythingButBar"
[Zypher@host01 monitor]$ stringThree="$stringOne and $stringTwo"
[Zypher@host01 monitor]$ echo $stringThree 
foo and anythingButBar

Answer 2

If instead you had:

stringOne="foo"
stringTwo="anythingButBar"
stringThree="%s and %s"

you could do:

$ printf "$stringThree\n" "$stringOne" "$stringTwo"
foo and anythingButBar