Debug d’un script bash

-n  Checks for syntax errors without executing the script (noexec).
    
-u  Causes an error to be thrown whenever you try to access a variable that has 
    not been set (nounset).
    
-v  Sends all lines to standard error (stderr) as they are read, even comments.

-x  Turns on execution tracing (xtrace) which displays each command as it is 
    executed.
.
errexit   (-e)      Causes the script to exit whenever there is an error.
noclobber (-C)      Prevents the overwriting of files when using redirection.
nounset   (-u)      Causes the shell to throw an error whenever an unset 
                    variable is used.
pipefail            Causes a pipeline to error out if any section has an error.