shell判斷檔案或檔案夾是否存在

shell命令判斷檔案或檔案夾是否存在，先直接看執行個體：

#!/bin/sh#判斷檔案存在，判斷是否為檔案夾等testPath="/Volumes/MacBookProHD/Mr.Wen/08 shell命令"testFile="/Volumes/MacBookProHD/Mr.Wen/08 shell命令/fileWen"#判斷檔案夾是否存在 -dif [[ ! -d "$testPath" ]]; thenecho "檔案夾不存在"elseecho "檔案夾存在"fi#判斷檔案夾是否存在，並且具有可執行許可權if [[ ! -x "$testFile" ]]; thenecho "檔案不存在並且沒有可執行許可權"elseecho "檔案存在並有可執行許可權"fi#判斷檔案是否存在if [[ ! -f "$testFile" ]]; thenecho "檔案不存在"elseecho "檔案存在"fi

在shell命令指令碼編寫當中，會遇到各種對檔案的判斷，除了以上常用的判斷，還有其他的可以使用，如下：

Conditional Logic on Files

-a file exists.

-b file exists and is a block special file.

-c file exists and is a character special file.

-d file exists and is a directory.

-e file exists (just the same as -a).

-f file exists and is a regular file.

-g file exists and has its setgid(2) bit set.

-G file exists and has the same group ID as this process.

-k file exists and has its sticky bit set.

-L file exists and is a symbolic link.

-n string length is not zero.

-o Named option is set on.

-O file exists and is owned by the user ID of this process.

-p file exists and is a first in, first out (FIFO) special file or

named pipe.

-r file exists and is readable by the current process.

-s file exists and has a size greater than zero.

-S file exists and is a socket.

-t file descriptor number fildes is open and associated with a

terminal device.

-u file exists and has its setuid(2) bit set.

-w file exists and is writable by the current process.

-x file exists and is executable by the current process.

-z string length is zero.