Bash Command Line
Standard Command-Line Options
bash-specific Command Line Options
End of options. Anything further on the command line is an argument, not an option.
Start a non-interactive shell, which executes the string that follows
-c. To avoid the shell that executes the bash invoked with -c to perform command line expansion, the string should be enclosed in single quotes:
bash -c 'i=0; echo $i'
Ctrl - R