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這期內容當中小編將會給大家帶來有關怎么在linux中素shell 判斷文件是否存在,文章內容豐富且以專業的角度為大家分析和敘述,閱讀完這篇文章希望大家可以有所收獲。
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 $result_name fi
shell命令判斷文件或文件夾是否存在,先直接看實例:
#!/bin/sh #判斷文件存在,判斷是否為文件夾等 testPath="/Volumes/MacBookProHD/Mr.Wen/08 shell命令" testFile="/Volumes/MacBookProHD/Mr.Wen/08 shell命令/fileWen" #判斷文件夾是否存在 -d if [[ ! -d "$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 0 fi
上述就是小編為大家分享的怎么在linux中素shell 判斷文件是否存在了,如果剛好有類似的疑惑,不妨參照上述分析進行理解。如果想知道更多相關知識,歡迎關注億速云行業資訊頻道。
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