mktemp -建立一個臨時文件或目錄

語法:
       mktemp [OPTION]... [TEMPLATE]

Create a temporary file or directory, safely, and print its name.
TEMPLATE must contain at least 3 consecutive 'X's in last  component.
If TEMPLATE is not specified, use tmp.XXXXXXXXXX, and --tmpdir is implied.
Files are created u+rw, and directories  u+rwx,  minus  umask  restrictions.

安全的建立臨時文件或目錄並輸出建立的文件名.
若是須要指定最後部分的[TEMPLATE],它必須包含至少3個連續的X字符
若是沒有指定[TEMPLATE] ,則默認使用tmp.XXXXXXXXXX (連續10個X字符)
建立的臨時文件和目錄默認在/tmp下
經過mktemp命令建立的臨時文件的默認權限爲u+rw,臨時目錄權限爲u+rwx

      -d, --directory
             create a directory, not a file
    //建立一個目錄
      -u, --dry-run
             do not create anything; merely print a name (unsafe)
    //僅打印文件名不建立任何文件或目錄

      -q, --quiet
             suppress diagnostics about file/dir-creation failure

      --suffix=SUFF
             append  SUFF  to  TEMPLATE; SUFF must not contain a slash.  This
             option is implied if TEMPLATE does not end in X
    //指定TEMPLATE的後綴名,不能包含斜線.
    //也能夠直接加上除X字符之外的任意字符後綴做爲TEMPLATE,二者等效

      -p DIR, --tmpdir[=DIR]
             interpret TEMPLATE relative to DIR; if DIR is not specified, use
             $TMPDIR  if set, else /tmp.  With this option, TEMPLATE must not
             be an absolute  name;  unlike  with  -t,  TEMPLATE  may  contain
             slashes, but mktemp creates only the final component

    //指定要建立的臨時文件的路徑,不指定則爲/tmp.
    //TEMPLATE能夠包含路徑.但指定了DIR後,TEMPLATE不能再包含絕對路徑

      -t     interpret  TEMPLATE as a single file name component, relative to
             a directory: $TMPDIR, if set; else the directory  specified  via
             -p; else /tmp [deprecated] //官方已不同意使用

      --help display this help and exit

      --version              output version information and exit