Linux command
fi 命令
文本
涉及管道、覆盖或删除，执行前请先确认路径和参数。
常用示例
End if statement
if [ condition ]; then commands; fi
If-else structure
if [ condition ]; then commands; else other; fi
Nested if with
if [ cond1 ]; then cmd1; elif [ cond2 ]; then cmd2; fi
说明
fi is a shell keyword that closes an if conditional block. It's part of the shell's control flow syntax, marking where conditional execution ends. The if/then/fi structure evaluates conditions and executes code blocks based on exit statuses. Conditions can use test commands, [ ], or any command's exit status. fi must appear for every if, matching them like parentheses.
参数
- if
- Begin conditional block.
- then
- Commands to execute if condition is true.
- elif
- Else-if for additional conditions.
- else
- Commands if no conditions matched.
- fi
- End of if block (if spelled backward).
FAQ
What is the fi command used for?
fi is a shell keyword that closes an if conditional block. It's part of the shell's control flow syntax, marking where conditional execution ends. The if/then/fi structure evaluates conditions and executes code blocks based on exit statuses. Conditions can use test commands, [ ], or any command's exit status. fi must appear for every if, matching them like parentheses.
How do I run a basic fi example?
Run `if [ condition ]; then commands; fi` in a terminal, then adjust file names, paths, flags, or remote targets for your system.
What does if do in fi?
Begin conditional block.