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(guī)文件，則為真
-L filename 如果 filename為符號(hào)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(zhí)行，則為真
-s filename 如果文件長(zhǎng)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(chuàng)建
if [ ! -d $result_name ];then mkdir -p $result_namefi
shell命令判斷文件或文件夾是否存在，先直接看實(shí)例：
#!/bin/sh#判斷文件存在，判斷是否為文件夾等testPath="/Volumes/MacBookProHD/Mr.Wen/08 shell命令"testFile="/Volumes/MacBookProHD/Mr.Wen/08 shell命令/fileWen"#判斷文件夾是否存在 -dif [[ ! -d "$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(zhí)行權(quán)限if [[ ! -x "$testFile" ]]; then echo "文件不存在并且沒有可執(zhí)行權(quán)限"else echo "文件存在并有可執(zhí)行權(quán)限"fi#判斷文件是否存在if [[ ! -f "$testFile" ]]; then echo "文件不存在"else echo "文件存在"fi
在shell命令腳本編寫當(dāng)中，會(huì)遇到各種對(duì)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(nèi)容是否改變
判斷文件內(nèi)容是否改變：
1）md5值判斷
2）diff 判斷
#添加日志時(shí)間戳function fn_showlog(){ local curtime; curtime=`date +"%Y%m%d-%H:%M:%S"` echo "$curtime ------ $1";}#判斷文件內(nèi)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 [ $? -ne 0 ];then fn_showlog "文件內(nèi)容發(fā)生變化：$file" return 0 fi fi done return 1}diff_file "python*Ip" "/home/admin/tools/"if [ $? -eq 0 ];then fn_showlog "內(nèi)容發(fā)生改變......"else fn_showlog "內(nèi)容未發(fā)生改變，退出腳本!" exit 0fi到此這篇關(guān)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(guān)linux shell判斷文件存在內(nèi)容請(qǐng)搜索武林網(wǎng)以前的文章或繼續(xù)瀏覽下面的相關(guān)文章希望大家以后多多支持武林網(wǎng)！
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