스크립트 작성할 때 if 조건문의 옵션들..


문법

#!/bin/sh

if [ -f "$1" ]
then
    echo "$1 is a file"
else
    echo "$1 is not a file"
fi



String ComparisonDescription
Str1 = Str2Returns true if the strings are equal
Str1 != Str2Returns true if the strings are not equal
-n Str1Returns true if the string is not null
-z Str1Returns true if the string is null
Numeric ComparisonDescription
expr1 -eq expr2Returns true if the expressions are equal
expr1 -ne expr2Returns true if the expressions are not equal
expr1 -gt expr2Returns true if expr1 is greater than expr2
expr1 -ge expr2Returns true if expr1 is greater than or equal to expr2
expr1 -lt expr2Returns true if expr1 is less than expr2
expr1 -le expr2Returns true if expr1 is less than or equal to expr2
! expr1Negates the result of the expression
File ConditionalsDescription
-d fileTrue if the file is a directory
-e fileTrue if the file exists (note that this is not particularly portable, thus -f is generally used)
-f fileTrue if the provided string is a file
-g fileTrue if the group id is set on a file
-r fileTrue if the file is readable
-s fileTrue if the file has a non-zero size
-uTrue if the user id is set on a file
-wTrue if the file is writable
-xTrue if the file is an executable







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