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UNIXという考え方

Avatar for ikuwow ikuwow
September 28, 2015
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 UNIXという考え方

Avatar for ikuwow

ikuwow

September 28, 2015
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  1. ঺հ͞Ε͍ͯΔUNIXͷఆཧ • Small is beautiful • ҰͭͷϓϩάϥϜʹ͸Ұͭͷ͜ͱΛ͏·͘΍ΒͤΔ • Ͱ͖Δ͚ͩૣ͘ࢼ࡞Λ࡞੒͢Δ •

    ޮ཰ΑΓҠ২ੑ • ਺஋σʔλ͸ASCIIϑϥοτϑΝΠϧʹอଘ͢Δ • ιϑτ΢ΣΞͷᑏࢠΛ༗ޮʹ׆༻͢Δ • γΣϧεΫϦϓτΛ࢖͏͜ͱͰᑏࢠͷޮՌͱҠ২ੑΛߴΊΔ • ա౓ͷର࿩తΠϯλʔϑΣʔεΛආ͚Δ • ͢΂ͯͷϓϩάϥϜΛϑΟϧλʹ͢Δ
  2. $ echo `who | awk ‘{print $1}’ | sort |

    uniq ` | sed ’s/ /, /g’ 6ͭͷίϚϯυ ߦ਺ FDIP  XIP  BXL   TPSU   VOJR  TFE   ߹ܭ   ύΠϓ( | )ʹΑͬͯ ෳ਺ͷϓϩάϥϜ͕ ͏·͘࿈ܞ͢Δ ιϑτ΢ΣΞͷᑏࢠΛར༻͢Δ ɾͦΕͧΕ͕ϑΟϧλͱͯ͠ಈ࡞
  3. • ޷ΈʹԠͯࣗ͡෼Ͱ؀ڥΛௐઅͰ͖ΔΑ͏ʹ͢Δ • OSͷΧʔωϧΛখܰ͘͘͢͞Δ • খจࣈΛ࢖͍ɺ୹͘͢Δ • ৿ྛΛकΔ • ௜໧͸ۚ

    • ಉ࣌ʹߟ͑Δ • ෦෼ͷ૯࿨͸શମΑΓ΋େ͖͍ • 90%ͷղΛ໨ࢦ͢ • ྼΔ΄͏͕༏Ε͍ͯΔɻ • ֊૚తʹߟ͑Δ ͦͷଞখఆཧ
  4. lsʢUNIXʣͱdirʢMS-DOSʣ $ ls $ > dir DIRECTORY: NO FILES FOUND

    > Կ΋ͳ͍σΟϨΫτϦͷதͰͦΕͧΕͷίϚϯυΛଧͭͱɾɾɾ ग़ྗ͕ͳ͍ = ϑΝΠϧ͕ͳ͍ ਓ͕ݟͯϑΝΠϧ͕ͳ͍͜ͱ͸Θ͔Δ͕ ύΠϓ͢Δͱ͖͸ʁ ଞͷϓϩάϥϜͱҰॹʹ࢖͏ʹ͸ʁ