linuxshell中判断⽂件、⽬录是否存在的⽅法本⽂主要介绍了linux shell 中判断⽂件、⽬录是否存在的⽅法，分享给⼤家
-e filename 如果 filename存在，则为真
-d filename 如果 filename为⽬录，则为真
-f filename 如果 filename为常规⽂件，则为真
-L filename 如果 filename为符号链接，则为真
linux执行shell命令-r filename 如果 filename可读，则为真
-w filename 如果 filename可写，则为真
-x filename 如果 filename可执⾏，则为真
-s filename 如果⽂件长度不为0，则为真
-h filename 如果⽂件是软链接，则为真
常⽤例⼦
如果存在某⽂件，则删除
if [ -f trials ]; then rm ${result_path}trials; fi
如果没有⽂件夹，则创建
if [ ! -d $result_name ];then
mkdir -p $result_name
fi
shell命令判断⽂件或⽂件夹是否存在，先直接看实例：
#!/bin/sh
#判断⽂件存在，判断是否为⽂件夹等
testPath="/Volumes/MacBookProHD/Mr.Wen/08 shell命令"
testFile="/Volumes/MacBookProHD/Mr.Wen/08 shell命令/fileWen"
#判断⽂件夹是否存在 -d
if [[ ! -d "$testPath" ]]; then
echo "⽂件夹不存在"
else
echo "⽂件夹存在"
fi
#判断⽂件夹是否存在，并且具有可执⾏权限
if [[ ! -x "$testFile" ]]; then
echo "⽂件不存在并且没有可执⾏权限"
else
echo "⽂件存在并有可执⾏权限"
fi
#判断⽂件是否存在
if [[ ! -f "$testFile" ]]; then
echo "⽂件不存在"
else
echo "⽂件存在"
fi
在shell命令脚本编写当中，会遇到各种对⽂件的判断，除了以上常⽤的判断，还有其他的可以使⽤，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.
shell 判断⽂件内容是否改变
判断⽂件内容是否改变：
1）md5值判断
2）diff 判断
#添加⽇志时间戳
function fn_showlog()
{
local curtime;
curtime=`date +"%Y%m%d-%H:%M:%S"`
echo "$curtime ------ $1";
}
#判断⽂件内容是否⼀致
function diff_file(){
for file in `ls $1`
do
if [ ! -f "$2$file" ];then
fn_showlog "存在新增⽂件：$2$file"
return 0
else
diff $file $2$file
if [ $? -ne 0 ];then
fn_showlog "⽂件内容发⽣变化：$file"
return 0
fi
fi
done
return 1
}
diff_file "python*Ip" "/home/admin/tools/"
if [ $? -eq 0 ];then
fn_showlog "内容发⽣改变......"
else
fn_showlog "内容未发⽣改变，退出脚本!"
exit 0
fi
到此这篇关于linux shell 中判断⽂件、⽬录是否存在的⽅法的⽂章就介绍到这了，更多相关linux shell判断⽂件存在内容请搜索以前的⽂章或继续浏览下⾯的相关⽂章希望⼤家以后多多⽀持！

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