shell基础——创建临时文件

（1）当前时间命名临时文件：

按照一定的格式获取当前时间：
date +%y-%m-%d_%H:%M:%S

#generate the file name
tmpfile=`date +%y-%m-%d_%H:%M:%S`

#create a empty file
>$tmpfile

#do what you want to do using the temp file
#...
#

#delete temp file
rm -f $tmpfile

（2）当前进程ID命名临时文件：

获取当前进程ID：

$$

#generate the file name
tmpfile=$$

#create a empty file
>$tmpfile

#do what you want to do using the temp file
#...
#

#delete temp file
rm -f $tmpfile

（3）隐藏的临时文件

#generate the file name
tmpfile="temp"  #Temp file middile name
prefix=.        #In Linux env, hide the file use .
suffix=_$$      #Using process ID as the suffix of temp file name
tmpfile=${prefix}${tmpfile}${suffix}

#create a empty file
>$tmpfile

#do what you want to do using the temp file
#...
#

#delete temp file
rm -f $tmpfile