为什么这个 4 行 bash 脚本不起作用？ [复制]

Question

基于此答案：https://stackoverflow.com/a/4141042/226473

我想出了这个脚本：

ALT02884% for i in {0..4}
do
  printf "Set for $1" > "$i_directories"
done

但它会导致以下结果：

zsh: no such file or directory:
zsh: no such file or directory:
zsh: no such file or directory:
zsh: no such file or directory:
zsh: no such file or directory:

Answer 1

shell 认为下划线是变量名的一部分。使用花括号告诉它查找名为 i 而不是 i_directories 的变量。

for i in {0..4}
do
  printf "Set for $1" > "${i}_directories"
done