本文主要介紹了linux shell 中判斷文件、目錄是否存在的方法，分享給大家
-e filename 如果 filename存在，則為真
-d filename 如果 filename為目錄，則為真
-f filename 如果 filename為常規文件，則為真
-L filename 如果 filename為符號鏈接，則為真
-r filename 如果 filename可讀，則為真
-w filename 如果 filename可寫，則為真
-x filename 如果 filename可執行，則為真
-s filename 如果文件長度不為0，則為真
-h filename 如果文件是軟鏈接，則為真
常用例子
如果存在某文件，則刪除
if [ -f trials ]; then rm ${result_path}trials; fi如果沒有文件夾，則創建
if [ ! -d $result_name ];then mkdir -p $result_namefi
shell命令判斷文件或文件夾是否存在，先直接看實例：
#!/bin/sh#判斷文件存在，判斷是否為文件夾等testPath="/Volumes/MacBookProHD/Mr.Wen/08 shell命令"testFile="/Volumes/MacBookProHD/Mr.Wen/08 shell命令/fileWen"#判斷文件夾是否存在 -dif [[ ! -d "$testPath" ]]; then echo "文件夾不存在"else echo "文件夾存在"fi#判斷文件夾是否存在，并且具有可執行權限if [[ ! -x "$testFile" ]]; then echo "文件不存在并且沒有可執行權限"else echo "文件存在并有可執行權限"fi#判斷文件是否存在if [[ ! -f "$testFile" ]]; then echo "文件不存在"else echo "文件存在"fi
在shell命令腳本編寫當中，會遇到各種對文件的判斷，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. |
shell 判斷文件內容是否改變
判斷文件內容是否改變：
1）md5值判斷
2）diff 判斷
#添加日志時間戳function fn_showlog(){ local curtime; curtime=`date +"%Y%m%d-%H:%M:%S"` echo "$curtime ------ $1";}#判斷文件內容是否一致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 [ $? -ne 0 ];then fn_showlog "文件內容發生變化：$file" return 0 fi fi done return 1}diff_file "python*Ip" "/home/admin/tools/"if [ $? -eq 0 ];then fn_showlog "內容發生改變......"else fn_showlog "內容未發生改變，退出腳本!" exit 0fi到此這篇關于linux shell 中判斷文件、目錄是否存在的方法的文章就介紹到這了,更多相關linux shell判斷文件存在內容請搜索武林網以前的文章或繼續瀏覽下面的相關文章希望大家以后多多支持武林網！
新聞熱點
疑難解答
