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。
免責聲明:本站發布的內容(圖片、視頻和文字)以原創、轉載和分享為主,文章觀點不代表本網站立場,如果涉及侵權請聯系站長郵箱:is@yisu.com進行舉報,并提供相關證據,一經查實,將立刻刪除涉嫌侵權內容。