Linux command
false 命令
文件
复制后可按需替换文件名、目录或参数。
常用示例
Return failure status
false
Use in conditional
if false; then echo "never"; fi
Chain with or
false || echo "false returned failure"
Infinite loop idiom
while false; do :; done
说明
false does nothing and returns a failure exit status (1). It's the counterpart to true and is used in shell scripts for flow control, testing, and as a placeholder. The command takes no operands and always exits with status 1, indicating failure. This makes it useful in conditional statements, loops that should never execute, and testing error handling. false is a POSIX-standard command and shell builtin, providing a guaranteed failure exit status.
参数
- --help
- Display help information.
- --version
- Display version information.
FAQ
What is the false command used for?
false does nothing and returns a failure exit status (1). It's the counterpart to true and is used in shell scripts for flow control, testing, and as a placeholder. The command takes no operands and always exits with status 1, indicating failure. This makes it useful in conditional statements, loops that should never execute, and testing error handling. false is a POSIX-standard command and shell builtin, providing a guaranteed failure exit status.
How do I run a basic false example?
Run `false` in a terminal, then adjust file names, paths, flags, or remote targets for your system.
What does --help do in false?
Display help information.