Bash stands for Bourne Again Shell. It is free software written to replace Bourne shell.
We can see following line in shell scripts for Bash shell.
In Bash we use ~/.profile at login to set environment variables.
In Bash we can execute commands in batch mode or concurrent mode.
In batch mode commands are separated by semi colon.
% command1; command2
In concurrent mode we separate commands by & symbol.
% command1 & command2