27 сент. 2015 г. · <<< is known as here-string . Instead of typing in text, you give a pre-made string of text to a program. For example, with such program as bc ...

7 апр. 2015 г. · If you want the side-effects of the command list to affect your current shell, use {...} If you want to discard any side-effects, use (...).

14 авг. 2015 г. · Both execute the script that is located in the same directory that you are in, ie your current working directory. Doing . script is referred to as sourcing the ...

20 авг. 2013 г. · && only runs the second command if the first one exited with status 0 (was successful). ; runs both the commands, even if the first one exits with a non zero ...

28 авг. 2016 г. · I have read about && and || and I'd like to run two commands in the false case. I have tried ; but that is running always.

4 апр. 2015 г. · In bash (Ubuntu's default interactive shell), everything following an open single quote ( ' ) is quoted literally, up until the next ' which ...

25 июл. 2017 г. · $# is typically used in bash scripts to ensure a parameter is passed. Generally, you check for a parameter at the beginning of your script.

17 сент. 2016 г. · Try issuing echo $BASH_VERSION. If this prints out a version number, you are in bash. If it outputs an empty line, you are inside some other shell.

9 дек. 2013 г. · -f is the correct choice. -a is for special files like device nodes, fifos and such, which according to the Unix philosophy of Everything is a file are ...

4 июл. 2020 г. · Putting exec first causes your shell to replace itself with the newly running command, rather than waiting for that command to finish.