Bash 文件判断

Bash 文件判断

一、命令

Command	Decription
-e	Check whether the file is existed
-f	check whether it is a normal file
-s	check whether the file size is zero
-d	check whether it is the dir file
-b	check whether it is the block type file
-c	check whether it is the char type file
-p	check whether it is the pipe type file
-L	check whether it is the symbol link file
-S	check whether it is the socket type file
-r/-w/-x	check whether it is readable/writable/excuteable
-O	check whether you are the owner of the file
-N	check whether the file is changed since it is readed last time ？
f1 -nt f2	file 1 is newer than file 2
f1 -ot f2	file 1 is older than file 2

二、代码

#! /bin/bash file="abc" if [ -e "$file" ] then echo "$file is existed" else echo "$file is not existed" fi #if [ -N "$file" ] #then #echo "$file is changed" #else #echo "$file is not changed" #fi file1="456" file2="123" if [ "$file1" -nt "$file2" ] then echo "$file1 is newer than $file2" else echo "$file1 is older than $file2" fi # -f # check whether it is a normal file # -s # check whether the file size is zero # -d # check whether it is the dir file # -b # check whether it is the block type file # -c # check whether it is the char type file # -p # check whether it is the pipe type file # -L # check whether it is the symbol link file # -S # check whether it is the socket type file # -r/-w/-x # check whether it is readable/writable/excuteable # -O # check whether you are the owner of the file # -N # check whether the file is changed since it is readed last time # f1 -nt f2 # file 1 is newer than file 2 # f1 -ot f2 # file 1 is older than file 2