How do you append to an already existing string?
Solution 1:
In classic sh, you have to do something like:
s=test1
s="${s}test2"
(there are lots of variations on that theme, like s="$s""test2")
In bash, you can use +=:
s=test1
s+=test2
Solution 2:
$ string="test"
$ string="${string}test2"
$ echo $string
testtest2
Solution 3:
#!/bin/bash
message="some text"
message="$message add some more"
echo $message
some text add some more
Solution 4:
teststr=$'test1\n'
teststr+=$'test2\n'
echo "$teststr"