#!/bin/bash
# ==> James R. Van Zandt °¡ ÀÛ¼ºÇÑ ½ºÅ©¸³Æ®·Î ±×ÀÇ Çã¶ôÇÏ¿¡ ÀÌ°÷¿¡ ½Æ½À´Ï´Ù.

# ==> ÀÌ ¹®¼­ÀÇ ÀúÀÚ°¡ Ãß°¡ÇÑ ÁÖ¼®.

  
  HERE=`uname -n`    # ==> È£½ºÆ®À̸§
  THERE=bilbo
  echo "`date +%r`¿¡ $THERE ·Î ¹é¾÷À» ½ÃÀÛÇÕ´Ï´Ù"
  # ==> `date +%r` Àº ½Ã°£À» 12 ½Ã°£ Æ÷¸Ë("08:08:34 PM")À¸·Î ¸®ÅÏÇÕ´Ï´Ù.
  
  # /pipe °¡ º¸Åë ÆÄÀÏÀÌ ¾Æ´Ï°í ÁøÂ¥ ÆÄÀÌÇÁÀÎÁö È®ÀÎ.
  rm -rf /pipe
  mkfifo /pipe       # ==> "/pipe"¶õ "³×ÀÓµå ÆÄÀÌÇÁ"(named pipd) ¸¸µé±â.
  
  # ==> 'su xyz' ´Â ¸í·É¾î¸¦ "xyz"¶õ »ç¿ëÀÚ·Î ½ÇÇà½Ãŵ´Ï´Ù.
  # ==> 'ssh' ´Â secure shellÀ» ¶ç¿ó´Ï´Ù(¿ø°ÝÁö ·Î±×ÀΠŬ¶óÀ̾ðÆ®).
  su xyz -c "ssh $THERE \"cat >/home/xyz/backup/${HERE}-daily.tar.gz\" < /pipe"&
  cd /
  tar -czf - bin boot dev etc home info lib man root sbin share usr var >/pipe
  # ==> ³×ÀÓµå ÆÄÀÌÇÁ(/pipe)¸¦ ½á¼­ ÇÁ·Î¼¼½º³¢¸® Åë½ÅÀ» ÇÔ
  # ==> 'tar/gzip' Àº /pipe·Î ¾²°í, 'ssh'Àº /pipe¿¡¼­ ÀÐÀ½

  # ==> ÃÖÁ¾ °á°ú´Â / ÀÌÇÏÀÇ ¸ÞÀÎ µð·ºÅ丮µéÀÌ ¹é¾÷ µË´Ï´Ù.

  # ==> Áö±Ý °°Àº »óȲ¿¡¼­ "À͸íÀÇ ÆÄÀÌÇÁ"ÀÎ | ´ë½Å ±× ¹Ý´ëÀÎ 
  # ==> "³×ÀÓµå ÆÄÀÌÇÁ"¸¦ ¾´ °ÍÀÌ ¾î¶² ÀÌÁ¡ÀÌ ÀÖÀ»±î¿ä?
  # ==> À͸í ÆÄÀÌÇÁµµ Á¦´ë·Î µ¿ÀÛÇÒ±î¿ä?


  exit 0