输入chmod u+x*.sh之后还是显示zsh: permission denied

输入chmod u+x*.sh后显示
usage: chmod [-fhv] [-R [-H | -L | -P]] [-a | +a | =a [i][# [ n]]] mode|entry file ...
chmod [-fhv] [-R [-H | -L | -P]] [-E | -C | -N | -i | -I] file ...

之后访问 /usr/local/bin还是显示zsh: permission denied

用sudo试一下