awk basics
by
yammerjp
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தࢁܚ༞ Μ·ʔ BXLCBTJDT ڝϓϩ͘͘Θ͍Θ͍ձ
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தࢁܚ༞ w ৬ۀ8FCΞϓϦέʔγϣϯ ΤϯδχΞ ʙ w झຯEPU fi MFTͷཧ w झຯBXLΛॻ͘͜ͱ w 5XJUUFS(JU)VCZBNNFSKQ Μ·ʔ
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BXL ςΩετॲཧʹಛԽͨ͠ϓϩάϥϛϯάݴޠ
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BXL ඪ४ೖྗΛѻ͏ͷ͕ಘҙ
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BXL ڝٕϓϩάϥϛϯάΓ͍͢
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࣮༻తͳBXLͷ͍ํ
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ྫBQBDIFͷΞΫηεϩά͔Β*1ΞυϨεΛൈ͖ग़͢ ʜۭന۠Γͷ൪ͷϑΟʔϧυ
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ྫBQBDIFͷΞΫηεϩά͔Β*1ΞυϨεΛൈ͖ग़͢ ʜۭന۠Γͷ൪ͷϑΟʔϧυ cat access.log | awk ‘{ print $1 }’ | head -3 ʜۭന۠Γͷ൪ͷϑΟʔϧυ
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BXLͷϢʔεέʔεͷҎ্͜Ε ӕͩͱࢥͬͨ͋ͳͨɺ4MBDLΛʮBXLʯͰݕࡧͯ͠ΈΔͱ͍͍Ͱ͢
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BXLͷॻ͖ํ
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جຊจ๏ ɹɹɹɹɹɹɹɹɹύλʔϯ\ΞΫγϣϯ^ ɾύλʔϯ͕Ұக͢ΔߦʹɺΞΫγϣϯΛ࣮ߦ ɾύλʔϯΛলུ͢Δʜਅ શߦʹΞΫγϣϯΛద༻ ɾΞΫγϣϯΛলུ͢Δʜ\QSJOU^ ߦશମΛग़ྗ
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ಛघͳม ඪ४ೖྗͷߦશମ ʜۭന۠ΓͷO൪ͷϑΟʔϧυ /'ϑΟʔϧυ /3ݱࡏͷߦ൪߸
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<4FQ>(&5XQ DBU)551ʜུ <4FQ>(&5TDSJQUJOHKBWBIUNMʜུ <4FQ>(&5XQ TSBTQCFSSZQʜུ /' /3 ಛघͳม
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<4FQ>(&5XQ DBU)551ʜུ <4FQ>(&5TDSJQUJOHKBWBIUNMʜུ <4FQ>(&5XQ TSBTQCFSSZQʜུ /' /3 ಛघͳม
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<4FQ>(&5XQ DBU)551ʜུ <4FQ>(&5TDSJQUJOHKBWBIUNMʜུ <4FQ>(&5XQ TSBTQCFSSZQʜུ /' /3 ಛघͳม
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ྫߦͷ*1ΞυϨεΛग़ྗ NR==33 { print $1 }
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ྫ֤ߦͷۮྻͷϑΟʔϧυΛग़ྗ { for(i=1; i<=NF; i++) { if(i%2==0) { if(i!=1) { printf(“ “) } printf(“%s”, $i) } } printf(“\n”) } IUUQTHJTUHJUIVCDPNZBNNFSKQEECBBFGCEFDEB
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ྫ"#$ $0=$(gsub(_,FS)/2) ɾʮʹೖ͢Δʯͱ͍͏ύλʔϯ㱺ਅ ɾਅͳͷͰɺΛग़ྗ ˠʮQSJOUʯͱॻ͘ͱ͜ΖΛɺʮʯͱॻ͍ͯจࣈઅ IUUQTHJTUHJUIVCDPNZBNNFSKQDEBCFCGEDG
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εϥΠυதͷBDDFTTMPHɺॻ੶ʮϚελϦϯά-JOVYγΣϧεΫϦϓτʯͷαϯϓϧίʔυΛ༻͍ͯ͠·͢ IUUQTHJUIVCDPNPSFJMMZKBQBONBTUFSJOHMJOVYTIFMMTDSJQUJOHFKBCMPCNBJODIBDDFTTMPH
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BXLΛͨͷ͠͏