Bash Scripting - How to Concatenate Strings
Somewhere around 1989, Brian Fox created Bash as a free software substitute for the Bourne shell for the GNU Project . It is a command processor, usually running in a text window, where the user can write commands that cause actions. Bash can also read and execute commands from shell script files . It supports filename globbing (wildcard matching), piping, here documents, command substitution, variables, and control structures for conditional testing and iteration, as do other Unix shells.