mktemp command

最适合存储临时数据的位置是/tmp, mktemp 命令可以为临时文件或目录创建唯一的名字

Create a temporary file or directory.

mktemp

Create a temporary file or directory.

- Create an empty temporary file and return the absolute path to it:
    mktemp

- Create a temporary directory and return the absolute path to it:
    mktemp -d

- Create a temporary file with a specified suffix:
    mktemp --suffix ".txt"

1.create temporary file (创建临时目录)

$filename=`mktemp`
echo $filename
/tmp/tmp.8xefliegnD9

2. create temporary directory (创建临时目录)

dirname=`mktemp -d`
echo $dirname
tmp.NJ8dhf6wk

• If you just want to generate a filename and don’t want to create the actual file or directory, you can(如果仅仅是想生成文件名，不希望创建实际的文件或目录，可以):
  mktemp -u

• Create a temporary filename based on the tempplate(基于模板创建临时文件名)

  ➜  qr_blog mktemp study.XXX
  study.UWT
  ➜  qr_blog mktemp study.XXX
  study.Usm
  ➜  qr_blog mktemp study.XXX
  study.M6a

Mac OS 与linux用法略有区别，请视情况使用

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