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脚本之家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脚本之家!