学步园

#!/bin/bash

mktemp_local()
{
    tempfile=`mktemp temp.XXXXXX`                   #文件名格式　file.XXXXXX  6个大写Ｘ
    exec 3>$tempfile

    echo -e "\nThis script writes to local temp file $tempfile\n"
    echo "This is first line." >&3
    echo "This is second line." >&3
    echo "This is third line." >&3

    echo "Done creating tempfile.The contents are:"
    cat $tempfile

    rm -f $tempfile 2>/dev/null
}

mktemp_sys()
{
    tempfile=`mktemp -t temp.XXXXXX`　　　　＃在系统临时目录下创建临时文件
    exec 3>$tempfile

    echo -e "\nThis script writes to  sys temp file $tempfile\n"
    echo "This is first line." >&3
    echo "This is second line." >&3
    echo "This is third line." >&3

    echo "Done creating tempfile.The contents are:"
    cat $tempfile

    rm -f $tempfile 2>/dev/null
}

mktemp_dir()
{
    tempdir=`mktemp -d ./tmpd.XXXXXX`　　　　＃创建临时目录
    cd $tempdir
    tempf_a=`mktemp tempf.XXXXXX`　　　　　＃创建本地临时文件
    tempf_b=`mktemp tempf.XXXXXX`
    exec 7>$tempf_a
    exec 8>$tempf_b

    echo "This is a test file for temp file:$tempf_a" >&7
    echo "This is a test file for temp file:$tempf_b" >&8

    echo -e "\nTempdir contents:\n"
    echo "$tempf_a contents:"
    cat $tempf_a
    echo "$tempf_b contents:"
    cat $tempf_b
    cd -　　　　　　　　　　　　　　　　　　　＃返回原来的路径
    echo -e "\nThe tempd is here:"
    ls -d $tempdir
    echo -e "\nrm the tempd is here:"
    rm $tempdir -rf 2>/dev/null
}

mktemp_local
mktemp_sys

mktemp_dir

＃要点

mktemp 命令及选项

　　　没有选项时建立本地临时文件

-t　　在系统的临时目录/tmp 下建立临时文件

-d　　建立临时目录