Question

I have a Linux machine (Red Hat Linux 5.1), and I need to add the following task to my Bash script.

Which Linux command or Bash syntax will calculate the next ASCII character?

Remark – the command syntax can be also AWK/Perl, but this syntax must be in my Bash script.

Example:

 input                  results

 a    --> the next is   b
 c    --> the next is   d
 A    --> the next is   B

Answer 1

Perl’s ++ operator also handles strings, to an extent:

perl -nle 'print ++$_'

The -l option with autochomp is necessary here, since a\n for example will otherwise return 1.