3 окт. 2019 г. · I've seen bash shell scripts which have this before some other commands set -u What does it do? I can't seem to find any documentation on it.

26 июн. 2020 г. · set -u tells the shell to treat expanding an unset parameter an error, which helps to catch eg typos in variable names.

27 янв. 2020 г. · set -o keyword allows to set one of the binary bash options defined by "keyword" where you need to replace "keyword" by the actual option name.

6 сент. 2016 г. · The set command (when not setting options) sets the positional parameters eg $ set a b c $ echo $1 a $ echo $2 b $ echo $3 c.

17 окт. 2020 г. · Use set to set shell options so that calling your script as bash script_name does not break its functionality.

20 сент. 2016 г. · To reverse a set -x just execute a set +x. Most of the time, the reverse of an string set -str is the same string with a +: set +str.

25 нояб. 2022 г. · For the case that you show, you may use ( set -x; ls ) The set operation modifies the local environment in the subshell but not the environment outside of it.

15 янв. 2016 г. · set is a shell builtin, used to set and unset shell options and positional parameters. Without arguments, set will print all shell variables.

22 июн. 2017 г. · Yes, set +a unsets set -a but variables do not become un exported because of that. Each variable then needs to be un exported or unset.

12 июн. 2024 г. · You could use a subshell: (set -x; ./blarge). This ensures that -x is only set for the duration of the subshell.