摘要：
enable Use the `env` command. Env is a command which launches another program with a possibly modified environment. Because env is a program, it doesn 阅读全文
摘要：
command command 只能跳过function,而不能跳过shell builtin 三个选项 -vV都是打印 -p 使用 default PATH 执行命令 bash默认PATH: /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sb 阅读全文