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ÇÒ´çÀÌ ¾Æ´Ï¶ó Å×½ºÆ® ¿¬»êÀÚÀÎ = °ú -eq°ú Çò°¥¸®¸é ¾È µË´Ï´Ù! = ´Â ¹®¸Æ¿¡ µû¶ó ÇÒ´ç ¿¬»êÀÚ³ª Å×½ºÆ® ¿¬»êÀÚ·Î Çؼ®µË´Ï´Ù. |
¿¹ 5-2. Æò¹üÇÑ º¯¼ö ÇÒ´ç
#!/bin/bash echo # When is a variable "naked", i.e., lacking the '$' in front? # When it is being assigned, rather than referenced. # ÇÒ´çÇÒ ¶§ a=879 echo "\"a\" ÀÇ °ªÀº $a ÀÔ´Ï´Ù." # 'let'À¸·Î ÇÒ´çÇÒ ¶§ let a=16+5 echo "\"a\" ÀÇ °ªÀº ÀÌÁ¦ $a ÀÔ´Ï´Ù." echo # 'for' ·çÇÁ¿¡¼(½ÇÁ¦·Î´Â, ÀÏÁ¾ÀÇ ¼ÓÀÓ¼ö ÇÒ´ç) echo -n "·çÇÁ¿¡¼ \"a\" ÀÇ °ªÀº " for a in 7 8 9 11 do echo -n "$a ÀÔ´Ï´Ù." done echo echo # 'read' ¹®¿¡¼(¿ª½Ã ÀÏÁ¾ÀÇ ÇÒ´çÀÓ) echo -n "\"a\" ¸¦ ³ÖÀ¸¼¼¿ä." read a echo "\"a\" ÀÇ °ªÀº ÀÌÁ¦ $a ÀÔ´Ï´Ù." echo exit 0 |
¿¹ 5-3. Æò¹üÇÏ°í Àç¹ÌÀÖ´Â º¯¼ö ÇÒ´ç
#!/bin/bash a=23 # Æò¹üÇÑ °æ¿ì echo $a b=$a echo $b # ÀÌÁ¦ ¾à°£ Àç¹Õ°Ô ÇØ º¾´Ï´Ù... a=`echo Hello!` # 'echo' ¸í·É¾îÀÇ °á°ú¸¦ 'a' ·Î ÇÒ´ç echo $a a=`ls -l` # 'ls -l' ¸í·É¾îÀÇ °á°ú¸¦ 'a' ·Î ÇÒ´ç echo $a exit 0 |
$(...) ±â¹ýÀ» ½á¼ º¯¼ö ÇÒ´çÇϱâ(¿ªµû¿ÈÇ¥(backquotes)º¸´Ù »õ·Î¿î ¹æ¹ý)
# /etc/rc.d/rc.local ¿¡¼ ¹ßÃé R=$(cat /etc/redhat-release) arch=$(uname -m) |