Bash Gaffer Tape
A short series of guides for using the versatile BASH shell on Raspberry Pi and other Linux computers.
This guide, for more advanced users of LINUX, shows how BASH scripts can be used for operations on strings and for arithmetical operations. The syntax for BASH is clearly explained.
This intermediate-level guide shows how BASH scripts can be used to handle files and to integrate other programming languages such as Perl. String manipulation features heavily in the exercises. A challenge is set to use a Python program along with a shell script.