Linux Shell Test

標籤：linux   字串   false   equivalent   

( EXPRESSION )

EXPRESSION is true          EXPRESSION為真

! EXPRESSION

EXPRESSION is false        EXPRESSION為假

EXPRESSION1 -a EXPRESSION2

both EXPRESSION1 and EXPRESSION2 are true      兩者都為真

EXPRESSION1 -o EXPRESSION2

either EXPRESSION1 or EXPRESSION2 is true      其中一個為真

-n STRING

the length of STRING is nonzero                字串長度非0

STRING equivalent to -n STRING

-z STRING

the length of STRING is zero                  字串長度為0

STRING1 = STRING2

the strings are equal                       字串相等

STRING1 != STRING2

the strings are not equal                    字串不相等

INTEGER1 -eq INTEGER2

INTEGER1 is equal to INTEGER2                 INTEGER1等於INTEGER2

INTEGER1 -ge INTEGER2

INTEGER1 is greater than or equal to INTEGER2      INTEGER1大於等於INTEGER2

INTEGER1 -gt INTEGER2

INTEGER1 is greater than INTEGER2              INTEGER1大於INTEGER2

INTEGER1 -le INTEGER2

INTEGER1 is less than or equal to INTEGER2        INTEGER1小於等於INTEGER2

INTEGER1 -lt INTEGER2

INTEGER1 is less than INTEGER2            INTEGER1小於INTEGER2

INTEGER1 -ne INTEGER2

INTEGER1 is not equal to INTEGER2              INTEGER1不等於INTEGER2

FILE1 -ef FILE2

FILE1 and FILE2 have the same device and inode numbers

FILE1 -nt FILE2

FILE1 is newer (modification date) than FILE2

FILE1 -ot FILE2

FILE1 is older than FILE2

-b FILE

FILE exists and is block special               檔案存在且為塊特殊檔案

-c FILE

FILE exists and is character special            檔案存在且為字元特殊檔案

-d FILE

FILE exists and is a directory                檔案存在且為目錄

-e FILE

FILE exists                            檔案存在

-f FILE

FILE exists and is a regular file              檔案存在且為正規檔案

-g FILE

FILE exists and is set-group-ID               檔案存在且已設定組ID

-G FILE

FILE exists and is owned by the effective group ID  檔案存在且屬組為有效組ID

-h FILE

FILE exists and is a symbolic link (same as -L)    檔案存在且為符號連結

-k FILE

FILE exists and has its sticky bit set          檔案存在且已設定sticky-bit許可權

-L FILE

FILE exists and is a symbolic link (same as -h)    檔案存在且為符號連結

-O FILE

FILE exists and is owned by the effective user   ID檔案存在且屬主為有效使用者ID

-p FILE

FILE exists and is a named pipe

-r FILE

FILE exists and read permission is granted      檔案存在且可讀

-s FILE

FILE exists and has a size greater than zero     檔案存在且大小非0

-S FILE

FILE exists and is a socket            檔案存在且是socket檔案

-t FD  file descriptor FD is opened on a terminal

-u FILE

FILE exists and its set-user-ID bit is set   檔案存在且已設定set-user-id bit許可權

-w FILE

FILE exists and write permission is granted            檔案存在且可寫

-x FILE

FILE exists and execute (or search) permission is granted   檔案存在且可執行

Linux Shell Test