{"id":657,"date":"2008-10-30T18:30:19","date_gmt":"2008-10-30T18:30:19","guid":{"rendered":"http:\/\/pchero21.com\/?p=657"},"modified":"2008-10-30T18:30:19","modified_gmt":"2008-10-30T18:30:19","slug":"awk-%ed%8c%a8%ed%84%b4-%ec%b2%98%eb%a6%ac-%ec%96%b8%ec%96%b4","status":"publish","type":"post","link":"http:\/\/pchero21.com\/?p=657","title":{"rendered":"awk (\ud328\ud134 \ucc98\ub9ac \uc5b8\uc5b4)"},"content":{"rendered":"

 \uc6d0\ubcf8 \ubb38\uc11c\uc5d0\uc11c \ud328\ud134\uc744 \uac80\uc0ac\ud574 \uc6d0\ud558\ub294 \uac12\uc744 \uc5bb\ub294\ub2e4.<\/span><\/p>\n

\nawk [\uc635\uc158] -F ‘script’ [\ubcc0\uc218=\uac12] [\ud30c\uc77c] \ub610\ub294 awk [\uc635\uc158] -f \uc2a4\ud06c\ub9bd\ud2b8 \ud30c\uc77c [\ubcc0\uc218=\uac12] [\ud30c\uc77c]<\/span> (Language : text)<\/span><\/legend>\n
\n \uc2a4\ud06c\ub9bd\ud2b8 \ud30c\uc77c : awk \uc2a4\ud06c\ub9bd\ud2b8\ub85c \uc791\uc5c9\ub41c \ud30c\uc77c<\/p>\n

\ubcc0\uc218 : awk \ub0b4\uc758 \ubcc0\uc218\ub97c \uc9c0\uc815\ud55c\ub2e4.<\/p>\n

\ud30c\uc77c : \ub300\uc0c1\ud30c\uc77c<\/p>\n

-F : \uad6c\ubd84\uc790\ub97c \ub098\ud0c0\ub0b8\ub2e4. -F \ub85c \uad6c\ubd84\uc790\ub97c \uc9c0\uc815\ud558\uc9c0 \uc54a\uc744 \uacbd\uc6b0\uc5d0\ub294 \uacf5\ubc31\uc744 \uad6c\ubd84\uc790\ub85c \uc0ac\uc6a9\ud55c\ub2e4.<\/p>\n

-f : \uc2a4\ud06c\ub9bd\ud2b8 \ud30c\uc77c\uc744 \uc774\uc6a9\ud560 \uacbd\uc6b0 \uc0ac\uc6a9\ud55c\ub2e4.<\/p><\/div>\n<\/fieldset>\n

 \ud45c\uc900 \uc785\ub825\uc73c\ub85c \uac12\uc744 \ubc1b\uc544 awk \uc2a4\ud06c\ub9bd\ud2b8\ub97c \ud1b5\ud574 \uc6d0\ud558\ub294 \ud45c\uc900 \ucd9c\ub825\uc744 \uc5bb\uc5b4\ub0b8\ub2e4.<\/p>\n

 awk \ub294 1977\ub144\uc5d0 AT&T \uc5f0\uad6c\uc18c\uc758 Alfred V.Aho, Peter J.Weinverger, Brain W.Kernighan \uc138 \uc0ac\ub78c\uc774 \ub9cc\ub4e4\uc5c8\ub2e4. awk \ub77c\ub294 \uc774\ub984\ub3c4 \uc774 \uc138\uc0ac\ub78c\uc758 \uc55e \uae00\uc790\ub85c \ub9cc\ub4e4\uc5b4 \uc84c\ub2e4. \ub9ac\ub205\uc2a4\uc5d0\uc11c\ub294 1986\ub144 Paul Rubin \uacfc Jay Fenlason \uc5d0 \uc758\ud574 GNU \ubc84\uc804\uc758 awk \uac00 \ub9cc\ub4e4\uc5b4 \uc84c\ub2e4.<\/p>\n

 awk \ub294 \uc77c\uc815\ud55c \uaddc\uce59\uc744 \uac00\uc9c0\uace0 \uc788\ub294 \ub370\uc774\ud130\ub97c \ucc98\ub9ac\ud558\uc5ec \uacc4\uc0b0, \ud1b5\uacc4, \ube44\uad50\ubd84\uc11d \ud639\uc740 \ud544\ud130\ub9c1\uc744 \ud1b5\ud55c \ub370\uc774\ud130 \ucd94\ucd9c \ub4f1\uc5d0 \ub2e4\uc591\ud558\uac8c \uc0ac\uc6a9\ub420 \uc218 \uc788\ub2e4. sed \uc640 \ube44\uc2b7\ud55c \uae30\ub2a5\uc744 \ud55c\ub2e4\uace0 \ud560 \uc218 \uc788\uc73c\uba70 awk \uc640 sed \uc758 \uc7a5\uc810\uc744 \ubb36\uc5b4\uc11c \ub9cc\ub4e4\uc5b4\uc9c4 perl \ub85c \ubc1c\uc804\ub418\uc5c8\uc9c0\ub9cc \ub2e8\uc21c\ud55c \uad6c\uc870\uc758 \ub370\uc774\ud130\uc758 \uacbd\uc6b0 \ub354 \ud6a8\uacfc\uc801\uc73c\ub85c \uc4f0\uc77c \uc218 \uc788\uc5b4\uc11c \uc9c0\uae08\ub3c4 \ub9ce\uc774 \uc0ac\uc6a9\ub418\uace0 \uc788\ub2e4.<\/p>\n

 awk \ub294 \uc27d\uace0 \uc720\uc6a9\ud558\uac8c \uc4f0\uc77c \uc218 \uc788\ub2e4. \ub2e8\uc21c\ud788 \uba85\ub839\uc5b4\ub85c \uc0ac\uc6a9\ub418\uac70\ub098 \ub2e4\ub978 \uc2a4\ud06c\ub9bd\ud2b8\uc5d0 sed \uc640 \ud568\uaed8 \ub2e4\ub978 \uc2a4\ud06c\ub9bd\ud2b8\uc5d0 \uc774\uc6a9\ub420 \uc218 \uc788\uace0 awk \ub9cc\uc758 \uc2a4\ud06c\ub9bd\ud2b8 \ud30c\uc77c\uc758 \uc791\uc131\ub3c4 \uac00\ub2a5\ud558\ub2e4.<\/p>\n

 \uba85\ub839\uc5b4 \uc0ac\uc6a9<\/span><\/p>\n

 \ud604\uc7ac \ub514\ub809\ud1a0\ub9ac\uc758 \ud30c\uc77c \uc815\ubcf4\ub97c \ubcf4\uae30 \uc704\ud574 ls -al \uba85\ub839\uc5b4\ub97c \uc774\uc6a9\ud558\uc5ec \ud30c\uc77c \ubaa9\ub85d\uc744 \ucd9c\ub825\ud55c\ub2e4. \uc774 \ubaa9\ub85d \uc911 \ud30c\uc77c\uc758 \uad8c\ud55c\uacfc \ud30c\uc77c\uba85\ub9cc \ubcf4\uae30\ub97c \uc6d0\ud55c\ub2e4\uba74 awk \ub97c \uc774\uc6a9\ud574 \uc5b4\ub835\uc9c0 \uc54a\uac8c \ud3b8\uc9d1\ud560 \uc218 \uc788\ub2e4. ls -al \uba85\ub839\uc73c\ub85c \ucd9c\ub825\ub418\ub294 \ub370\uc774\ud130\ub97c \ud30c\uc774\ud504(|)\ub85c awk \uac00 \ubc1b\uc544 \ud30c\uc77c\uc758 \uacf5\ubc31\uc744 \uae30\uc900\uc73c\ub85c \ub098\ub204\uc5b4 \uccab \ubc88\uc9f8 \ud544\ub3c4\uc640 8 \ubc88\uc9f8 \ud544\ub3c4\ub97c \ucd9c\ub825\ud55c\ub2e4.<\/p>\n

\"\uc0ac\uc6a9\uc790
\"\uc0ac\uc6a9\uc790
 awk \ub85c \ud544\ud130\ub9c1\ud558\uc5ec \ud30c\uc77c\uc758 \uad8c\ud55c\uacfc \ud30c\uc77c\uba85\ub9cc \ucd9c\ub825\ud55c\ub2e4. \uc704\uc640 \uac19\uc774 awk \ub294 \ub77c\uc778\uc744 \ubc1b\uc544 \uad6c\ubd84\uc790\ub97c \ud1b5\ud574 \uad6c\ubd84\ud558\uace0 print \uba85\ub839\uc73c\ub85c \ucd9c\ub825\ud558\uac8c \ub41c\ub2e4.<\/p>\n

 ls -al \ub85c \ucd9c\ub825\ub418\ub294 \ud589\uc744 \uacf5\ubc31\uc73c\ub85c \uad6c\ubd84\ud558\uba74 8\uac00\uc9c0\uc758 \ud544\ub4dc\ub85c \uad6c\ubd84\ub41c\ub2e4. \uac01 \ud544\ub4dc\ub294 \uacf5\ubc31\uc744 \uae30\uc900\uc73c\ub85c \uad6c\ubd84\ub41c\ub2e4. $1 ~ $8 \uae4c\uc9c0\ub85c \uac01 \ud544\ub4dc\uc758 \ubcc0\uc218\ub97c \ud45c\ud604\ud558\uba70, $0 \uc740 \ubaa8\ub4e0 \ud544\ub4dc\ub97c \ub9d0\ud55c\ub2e4.<\/p>\n

 \ud30c\uc77c \ubaa9\ub85d \uc911 1 Mb \uc774\uc0c1\uc758 \uc6a9\ub7c9\uc744 \uac16\ub294 \ud30c\uc77c\uba85\uacfc \uc6a9\ub7c9\uc744 \ucd9c\ub825\ud558\uace0 \uc2f6\ub2e4\uba74 awk \uc758 \uc870\uac74\ubb38\uc744 \uc0ac\uc6a9\ud558\uc5ec \uac00\ub2a5\ud558\ub2e4. 1 Mb = 1048576 bit \uc774\uae30 \ub54c\ubb38\uc5d0 \uc6a9\ub7c9\uc744 \ub098\ud0c0\ub0b4\ub294 5\ubc88\uc9f8 \ud544\ub4dc \uc911 1048576 \ubcf4\ub2e4 \ud070 \ub77c\uc778\uc744 \ucd9c\ub825\ud558\uba70 \uadf8 \uc911 5\ubc88\uc9f8\uc640 9\ubc88\uc9f8 \ud544\ub4dc\ub9cc \ucd9c\ub825\ud55c\ub2e4.<\/p>\n

\"\uc0ac\uc6a9\uc790<\/p>\n

 awk \ub97c \uc774\uc6a9\ud558\uba74 \ubb38\uc11c\uc758 \ud2b9\uc815 \ubb38\uc790\ub098 \ubb38\uc790\uc5f4\uc744 \uac80\uc0c9\ud558\uc5ec \uac80\uc0c9\ub418\uc5b4 \ub098\uc628 \ub77c\uc778\ub9cc \ucd9c\ub825\ud560 \uc218 \uc788\ub2e4.<\/p>\n

\"\uc0ac\uc6a9\uc790
 
 root \uacc4\uc815\uc744 \ud3ec\ud568\ud55c \ub77c\uc778\ub9cc \uac80\uc0c9\ud558\uc5ec \ucd9c\ub825\ud558\uc600\ub2e4.<\/p>\n

 \uccab \ubc88\uc9f8 \uc608\uc81c\uc5d0\uc11c\ub294 \ubb38\uc790\uc5f4 \uc911 \uad6c\ubd84 \ub418\uc5b4 \uc788\ub294 \ud544\ub4dc\ub97c \uc9c0\uc815\ud558\uc5ec \uc6d0\ud558\ub294 \ud544\ub4dc\ub9cc \ucd9c\ub825\ud558\uc600\uace0 \ub450 \ubc88\uc9f8 \uc608\uc81c\uc5d0\uc11c\ub294 \ubcf4\uae30\ub97c \uc6d0\ud558\ub294 \ud328\ud134\uc744 \uac00\uc9c4 \ub77c\uc778\ub9cc \uac80\uc0c9\ud558\uc5ec \ucd9c\ub825\ud558\uc600\ub2e4. \uc774 \ub450 \uac00\uc9c0\ub97c \uc870\ud569\ud558\uba74 \ubcf4\uae30\ub97c \uc6d0\ud558\ub294 \ub77c\uc778\uc5d0 \ud2b9\uc815 \ud544\ub4dc\ub9cc \ucd9c\ub825\uc774 \uac00\ub2a5\ud558\ub2e4.<\/p>\n

 \ub450 \ubc88\uc9f8 \uc608\uc81c\ub294 \/etc\/passwd \ud30c\uc77c\uc744 root \ub77c\ub294 \ud328\ud134\uc73c\ub85c \uac80\uc0c9\ud558\uc5ec root \ub77c\ub294 \ubb38\uc790\uc5f4\uc744 \ud3ec\ud568\ud55c \ub77c\uc778\ub9cc \ucd9c\ub825\ub418\uc5c8\ub2e4. “:\ud45c\uc2dc\ub85c \uad6c\ubd84\uc9c0\uc740 \ud544\ub4dc \uc911 \uc81c\uc77c \uba3c\uc800 \ub098\uc624\ub294 \uac83\uc774” \uadf8\ub8f9\uba85\uc778\ub370 \ub2e4\uc74c \uc608\uc81c\ub294 \uc774 \uadf8\ub8f9\uba85\ub9cc \ucd9c\ub825 \ub418\ub3c4\ub85d \ub9cc\ub4e4\uc5c8\ub2e4.<\/p>\n

 -F \ub294 \uad6c\ubd84\uc790\ub97c \uc815\uc758\ud55c \uc635\uc158\uc73c\ub85c \uae30\ubcf8\uc740 \uacf5\ubc31\uc744 \uc0ac\uc6a9\ud558\uc9c0\ub9cc \uc774 \ud30c\uc77c\uacfc \uac19\uc774 “-F:”\ub85c \uad6c\ubd84\uc790\ub97c \uc9c0\uc815\ud574 \uc0ac\uc6a9\ud560 \uc218 \uc788\ub2e4.<\/p>\n

\"\uc0ac\uc6a9\uc790
 \/root\/ \ub85c \uac80\uc0c9\ud55c \ud328\ud134 \ubd80\ubd84\uc5d0, \uc815\uaddc \ud45c\ud604\uc2dd\uc744 \uc0ac\uc6a9\ud558\uba74 \ub354\uc6b1 \uc790\uc138\ud55c \ud328\ud134\uc744 \uac80\uc0c9\ud560 \uc218 \uc788\ub2e4.<\/p>\n

 \uc2a4\ud06c\ub9bd\ud2b8 \ud30c\uc77c \uc774\uc6a9<\/span><\/p>\n

===========================================================================================
\uc2dc\uc791(Begin)    |  \uc2dc\uc791 \ub2e8\uacc4\ub85c\uc11c \uc804\uccb4 \uc2a4\ud06c\ub9bd\ud2b8\ub97c \uc704\ud55c \uc815\uc758 \ub2e8\uacc4\uc774\ub2e4.(Preprocessor)
——————————————————————————————-
\uc2e4\ud589(Routin)   |  \uc2e4\ud589\ub2e8\uacc4\ub85c\uc11c \uc774 \uc2a4\ud06c\ub9bd\ud2b8\uc758 \uae30\ub2a5\uc744 \uc218\ud589\ud558\ub294 \ub2e8\uacc4\ub77c\uace0 \ud560 \uc218 \uc788\ub2e4.
——————————————————————————————-
 \ub05d(End)       |  \ub9c8\ubb34\ub9ac \ub2e8\uacc4\uc774\ub2e4. \uacb0\uacfc\ub97c \ucd9c\ub825\ud55c\ub2e4.
===========================================================================================<\/p>\n

 awk \uc758 \uc2a4\ud06c\ub9bd\ud2b8 \uad6c\uc870\ub294 \uc2dc\uc791, \uc2e4\ud589, \ub9c8\ubb34\ub9ac\uc758 3\ub2e8\uacc4\ub85c \ub098\ub204\uc5b4\uc838 \uc788\ub2e4.<\/p>\n

 awk \ub294 \uc5ec\ub7ec \uc5f0\uc0b0\uc790\ub098 \ub8e8\ud504 \uc0ac\uc6a9\ubc95 \ub4f1\uc774 C \uc640 \uac19\uc544 C \ub97c \uc54c\uace0 \uc788\ub294 \uc0ac\uc6a9\uc790\ub77c\uba74 \uc5b4\ub824\uc6c0 \uc5c6\uc774 \uc0ac\uc6a9\ud560 \uc218 \uc788\ub2e4.<\/p>\n

 \ub2e4\uc74c\uc758 \uc2a4\ud06c\ub9bd\ud2b8\ub294 \ud30c\uc77c\uc758 \ub2e8\uc5b4 \uc218\ub97c \uac80\uc0ac\ud55c\ub2e4. wc \ub77c\ub294 \uba85\ub801\uc5b4\ub85c \uc27d\uac8c \ub2e8\uc5b4 \uac1c\uc218\ub97c \uccb4\ud06c\ud574 \ubcfc \uc218 \uc788\uc9c0\ub9cc \uc5ec\uae30\uc11c\ub294 \uac04\ub2e8\ud55c awk \uc2a4\ud06c\ub9bd\ud2b8 \uc608\uc81c\ub85c awk \uc2a4\ud06c\ub9bd\ud2b8 \uc0ac\uc6a9\ubc95\uc744 \uc54c\uc544\ubcf4\uc790.<\/p>\n

===========================================================================================
   awk \uc2a4\ud06c\ub9bd\ud2b8         |   \uad6c\uc870    |    \uc124\uba85
===========================================================================================
 #!\/bin\/awk            |   \uc120\uc5b8    | awk \ub85c \uc2a4\ud06c\ub9bd\ud2b8\uac00 \uc2e4\ud589\ub420 \uc218 \uc788\uac8c \uc120\uc5b8\ud55c\ub2e4.
——————————————————————————————-
 BEGIN {             |   \uc2dc\uc791    | \ubcc0\uc218 word \ub97c 0\uc73c\ub85c \ucd08\uae30\ud654 \ud55c\ub2e4.
        word = 0;      |  (Begin)  |
 }                      |            |
——————————————————————————————-
{                       |  \uc2e4\ud589     |  NF\ub294 \uac01 \ub77c\uc778\ub9c8\ub2e4\uc758 \ud544\ub4dc \uc218\ub97c \ub098\ud0c0\ub0b4\ub294 awk \uc2dc\uc2a4\ud15c \ubcc0\uc218\uc774\ub2e4. awk \ub294
       word += NF;   | (Routin)  | \uad6c\ubd84\uc790\uac00 \uc815\uc758\ub418\uc5b4 \uc788\uc9c0 \uc54a\uc744 \ub54c \uacf5\ubc31\uc744 \uad6c\ubd84\uc790\ub85c \uc0ac\uc6a9\ud558\ubbc0\ub85c \uac01 \ub77c\uc778\uc758
}                       |            | \ub2e8\uc5b4\uc758 \uc218\uac00 NF \ub85c \ub4e4\uc5b4\uac00\uace0 “+=” \uc5f0\uc0b0\uc790\uc5d0 \uc758\ud574\uc11c \ub9c8\uc9c0\ub9c9 \ub77c\uc778\uc758 \ub2e8\uc5b4
                        |            | \uac2f\uc218\uae4c\uc9c0 \ub354\ud574\uc900\ub2e4.
——————————————————————————————-
END {                |  \ub05d (END) | \ub9c8\ubb34\ub9ac \ub2e8\uacc4\uc774\ub2e4. \uacb0\uacfc\ub97c \ucd9c\ub825\ud55c\ub2e4.
print “Word Count: ” |             |
word;(End)            |             |
}                       |             |
===========================================================================================<\/p>\n

 \uc791\uc131\ub41c \uc2a4\ud06c\ub9bd\ud2b8\ub294 -f \uc635\uc158\uc73c\ub85c \uc2e4\ud589\ud55c\ub2e4. wordcount.txt \ub77c\ub294 \uc784\uc758\uc758 \ud14d\uc2a4\ud2b8 \ubb38\uc11c\ub97c \ubc29\uae08 \uc791\uc131\ud55c \uc2a4\ud06c\ub9bd\ud2b8\ub85c \uac80\uc0ac\ud574 \ubcf4\uc790. \uc791\uc131\ub41c awk \uc2a4\ud06c\ub9bd\ud2b8 \ud30c\uc77c\uc744 \uc2e4\ud589\ud558\ub824\uba74 awk -f [\uc2a4\ud06c\ub9bd\ud2b8 \ud30c\uc77c \uc774\ub984] \ud615\uc2dd\uc73c\ub85c \uc0ac\uc6a9\ud55c\ub2e4.<\/p>\n

\"\uc0ac\uc6a9\uc790<\/p>\n

awk \uc2dc\uc2a4\ud15c \ubcc0\uc218<\/span><\/p>\n

===============================================================================================
 \ubcc0\uc218      :            \ub0b4\uc6a9
===============================================================================================
 $0    : \uc785\ub825 \ub77c\uc778 \ubaa8\ub450
 $n    : \uc785\ub825 \ub77c\uc778\uc5d0\uc11c n \ubc88\uc9f8 \ud544\ub4dc \uac12
 ARGC    : \uba85\ub839 \ub77c\uc778 \uc778\uc790 \uc218\ub97c \uac16\ub294 \ubcc0\uc218
 ARGV    : \uba85\ub839 \ub77c\uc778\uc758 \uc778\uc790\ub97c \ud3ec\ud568\ud558\ub294 \ubc30\uc5f4
 ENVIRON    : \ud658\uacbd\ubcc0\uc218\ub4e4\uc744 \ubaa8\uc544\ub454 \uad00\uacc4\ud615 \ubc30\uc5f4
 FILENAME    : \ud604\uc7ac \ud30c\uc77c\uba85
 FS    : \uad6c\ubd84\uc790 \uc815\uc758, \uacf5\ubc31\uc744 \uae30\ubcf8\uc73c\ub85c \uc0ac\uc6a9
 FNR    : \uc785\ub825\ud30c\uc77c\uc758 \ub808\ucf54\ub4dc \ucd1d\uc218(\ub77c\uc778 \uc218)
 NF    : \ud604\uc7ac \ub808\ucf54\ub4dc \ud544\ub4dc \uc218
 NR    : \ud604\uc7ac \ub808\ucf54\ub4dc \ubc88\ud638
 OFMT    : \uc22b\uc790\uc5d0 \ub300\ud55c \ucd9c\ub825 \ud3ec\uba67
 OFS    : \ucd9c\ub825 \ub808\ucf54\ub4dc \uad6c\ubd84 (newline \uc744 \uae30\ubcf8\uc73c\ub85c \uc0ac\uc6a9)
 RLENGTH    : \uc9c0\uc815\ud55c \ud328\ud134\uc73c\ub85c \uac80\uc0c9\ub418\uc5b4 \ub098\uc628 \ubb38\uc790\uc5f4\uc758 \uae38\uc774
 RS    : \uc785\ub825 \ub808\ucf54\ub4dc \uad6c\ubd84 (newline \uc744 \uae30\ubcf8\uc73c\ub85c \uc0ac\uc6a9)
 RSTART    : \uc9c0\uc815\ud55c \ud328\ud134\uc73c\ub85c \uac80\uc0c9\ub418\uc5b4 \ub098\uc628 \ubb38\uc790\uc5f4\uc758 \uac00\uc7a5 \uc55e\ubd80\ubd84
=============================================================================================<\/p>\n

 awk \uc5f0\uc0b0\uc790<\/span><\/p>\n

 c \ub97c \ucc38\uc870\ud558\uc5ec \ub9cc\ub4e4\uc5b4 \uc84c\uc73c\ubbc0\ub85c \uc0ac\uc6a9\ubc84\uc774\ub098 \uc885\ub958\uac00 \uac70\uc758 \uac19\ub2e4.<\/p>\n

===============================================================================================
 \uc5f0\uc0b0\uc790            |                       \uc124\uba85
===============================================================================================
       ?            | \uc870\uac74\uc5f0\uc0b0
                    | \uc0ac\uc6a9\uc790\ub85c \ub4f1\ub85d\ub41c \uc544\uc774\ub514\uac00 user1, user2, user3 \ub85c \ub418\uc5b4 \uc788\uace0 \uadf8 \uc911 \uac80\uc0c9\ud558\uace0 \uc2f6\uc740 \ub0b4\uc6a9\uc774
                    | 1, ,2, 3 \uc911 \uc5b4\ub5a4 \uac83\uc778\uc9c0 \uba85\ud655\ud558\uc9c0 \uc54a\uc744 \uacbd\uc6b0 ? \ub97c \uc774\uc6a9\ud558\uc5ec \ubaa8\ub450 \uac80\uc0c9\ud560 \uc218 \uc788\ub2e4.
                    | # awk \/user? \/etc\/passwd
                    | user1:x:……
                    | user2:x:……
                    | user3:x:…..
———————————————————————————————–
 ||, &&, !          | \ub17c\ub9ac\uc5f0\uc0b0, or, and, not
———————————————————————————————–
 ~, !~              | \uac80\uc0c9\ub41c \ud328\ud134\uc5d0 \ubd80\ud569\ub418\ub294 \uac83\uc744 \ucc38\uc73c\ub85c \uc0ac\uc6a9\ud558\ub824\uba74 “~”, \uac70\uc9d3\uc73c\ub85c \uc0ac\uc6a9\ud558\ub824\uba74 “!~”\uc744 \uc0ac\uc6a9\ud568.
———————————————————————————————–
 <. <=. >, >=. !=, ==  | \ube44\uad50 \uc5f0\uc0b0\uc790
———————————————————————————————–
 +, -, *, \/, %, ^    |  \ub354\ud558\uae30, \ube7c\uae30, \uacf1\ud558\uae30, \ub098\ub204\uae30, \ub098\uba38\uc9c0, \uc81c\uacf1
———————————————————————————————–
  ++, —            | \uc99d\uac00 \uc5f0\uc0b0\uc790, \uac10\uc18c \uc5f0\uc0b0\uc790
===============================================================================================<\/p>\n

<\/p>\n","protected":false},"excerpt":{"rendered":"

 \uc6d0\ubcf8 \ubb38\uc11c\uc5d0\uc11c \ud328\ud134\uc744 \uac80\uc0ac\ud574 \uc6d0\ud558\ub294 \uac12\uc744 \uc5bb\ub294\ub2e4. awk [\uc635\uc158] -F ‘script’ [\ubcc0\uc218=\uac12] [\ud30c\uc77c] \ub610\ub294 awk [\uc635\uc158] -f \uc2a4\ud06c\ub9bd\ud2b8 \ud30c\uc77c [\ubcc0\uc218=\uac12] [\ud30c\uc77c] (Language : text) \uc2a4\ud06c\ub9bd\ud2b8 \ud30c\uc77c : awk \uc2a4\ud06c\ub9bd\ud2b8\ub85c \uc791\uc5c9\ub41c \ud30c\uc77c \ubcc0\uc218 : awk \ub0b4\uc758 \ubcc0\uc218\ub97c \uc9c0\uc815\ud55c\ub2e4. \ud30c\uc77c : \ub300\uc0c1\ud30c\uc77c … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[41],"tags":[114,530],"_links":{"self":[{"href":"http:\/\/pchero21.com\/index.php?rest_route=\/wp\/v2\/posts\/657"}],"collection":[{"href":"http:\/\/pchero21.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/pchero21.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/pchero21.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/pchero21.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=657"}],"version-history":[{"count":0,"href":"http:\/\/pchero21.com\/index.php?rest_route=\/wp\/v2\/posts\/657\/revisions"}],"wp:attachment":[{"href":"http:\/\/pchero21.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=657"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/pchero21.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=657"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/pchero21.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=657"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}