I have wrote the following lines to obtain the last character of a string:
It works for “abcd/”:
$ bash last_ch.sh abcd/
It does not work for “abcd*”:
$ bash last_ch.sh abcd*
array.sh assign.sh date.sh dict.sh full_path.sh
It lists the files in the current folder.
That’s one of the reasons why you need to quote your variables:
Otherwise, bash expands the variable & in this case does globbing before printing out. It is moreover better to quote the parameter to the script (in case you have a matching filename):
sh lash_ch.sh 'abcde*'
Also see the order of expansions in the bash reference manual. Variables are expanded before the filename expansion.