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11. ȥơ֥

11.1 ʸӱ黻

        (1) s1  =  s2    s1  s2 Ʊ
        (2) s1 !=  s2    s1  s2 ƱǤʤ
        (3) s1  <  s2     
        (4) s1  >  s2    
        (5) -n s1        s1  null Ǥʤ(ʸʾޤǤ)
        (6) -z s1        s1  null Ǥ

11.2 ʸӤμ

դĤʸӤ

        #!/bin/bash
        S1='string'
        S2='String'
        if [ $S1=$S2 ];
        then
                echo "S1('$S1') is not equal to S2('$S2')"
        fi
        if [ $S1=$S1 ];
        then
                echo "S1('$S1') is equal to S1('$S1')"
        fi

ǡ嵭 if [ $1 = $2 ] ˴ؤ Andrea Beck äƤ줿 ᡼ΰʸѤޤ

      ޤꤤͤȤϸޤ󡣤⤷$S1  $S2 Τɤ餫ξ硢
      ѡ顼ˤʤ뤫Ǥx$1=x$2  "$1"="$2" Ȥۤ褤
      礦

11.3 黻

11.4 ط黻

        -gt  ( >  )
        -le  ( <= )
        -ge  ( >= )
        -eq  ( == )
        -ne  ( != )

C ץ��ޤȤäƤ黻ҤˤĤƤ⡢ݥåбط򼨤ޤ

11.5 ʥޥ

Υ Kees (ռ򸫤Ƥ)ˤäƥ饤Ȥ줿ΤǤ

ʲΥޥɤΤʤˤϡʥץ��ߥ󥰸񤷤ƤȤ ʤΤ⤢ޤΥޥɤ夲ơˡ פޤܺ٤ʲˤĤƤϡޥɤΥޥ˥奢ڡߤƤ

sed (stream editor)

sed ϥΥ󡦥󥿥饯ƥ֤ʥǥǤ̾ư ʤեѹä뤫ˡԽ˴ؤؼԽ٤ե̾ 񤭹ץȤѤޤޤsed ϰΥե륿Ǥ ȹͤ뤳ȤǤޤĤ򸫤Ƥߤޤ礦

        $ sed 's/to_be_replaced/replaced/g' /tmp/dummy

嵭ˤơsed ϡ/tmp/dummy Ȥեɤ߹ ʸ "to_be_replaced" ʸ "replaced" η̤ɸ(̾ϥ󥽡)˽Ϥޤ嵭ޥɥ饤 (㤨) '> capture' դäʤ顢 "capture" Ȥ̾Υե sed νϷ̤뤳ȤǤޤ

        $ sed 12, 18d /tmp/dummy

嵭ǡsed 12 18 ܤޤǤƤ ԤɽޤΥޥɤˤäƸΥեѹä뤳ȤϤ ޤ

awk (ǡեƥȤθ)

AWK ץ��ߥ󥰸ˤ¿μ¸ߤޤ(Ǥͭ̾ʥ ꥿ϡGNU gawk ȡֿ awk Ǥ mawk Ǥ) AWK θñǤѥõơפѥ(pattern) ФƤʤ餫ν(action)ԤȤȤǤ

١ʲΤ褦ʹԤޤߡեޤ

        test123
        test
        tteesstt

        $ awk '/test/ {print}' /tmp/dummy
        test123
        test

website optimization company |Professional Link Building

嵭ˤơAWK õȤѥ(pattern) "test" ꡢ/tmp/dummy եιԤ椫 "test" Ȥʸ õФȤ˹Ԥä(action)̤ؤɽ "print" Ǥ

        $ awk '/test/ {i=i+1} END {print i}' /tmp/dummy
        3

¿ΥѥõȤƤȤϡơ('')Ϥޤ줿ʸ (㤨) '-f file.awk' Ȥäե֤̾ޤ С٤ƤΥѥȽ 'file.awk' Ȥե˽ ǡޤȤƼ¹ԤǤޤ

grep (ѥ˹פԤν)

grep ޥɤΡѥ˹פԤɽ뵡ǽˤĤƤϡ ޤǤξϤǤĤ⸫ƤȻפޤgrep εǽϤ ǤϤޤ

        $ grep "look for this" /var/log/messages -c
        12

嵭ϡ"look for this" Ȥʸ /var/log/messages եΤʤ 12 󸫤ĤäȤ̣ Ƥޤ

[ OK, ϥեʤ/var/log/messages ˤäȼä ȤΤ :-)]

wc (ԡ졢Хȿޤ)

ʲǤϡϤ̤ˤʤäƤʤΤʬȻפޤ Ȥ줿ߡեˤ(˻ȤäƤȤϰۤʤ)Τ褦ʸ󤬴ޤޤ ƤǤ餹

        bash introduction 
        howto test file

        $ wc --words --lines --bytes /tmp/dummy
        2 5 34 /tmp/dummy

wc Ǥϥѥ᡼ν֤ϼͳǤνϻν֤ϤĤ ޤäƤޤ嵭Τ褦ˡԿХȿե̾ ν֤ ʤޤ

sort (ƥȥեιԤ¤ؤ)

ΥߡեƤϼΤ褦ˤʤäƤޤ

        b
        c
        a

        $ sort /tmp/dummy

ϡΥȥץåȤɤɽ뤫Ǥ

        a
        b
        c

ޥɤȤȤȡۤɴñˤϤʤǤ礦

bc (׻ѤΥץ��ߥ󥰸)

bc ϥޥɥ饤褯Ǥ׻ץ��Ǥ쥯 ȤѥפϤǤޤ󤬡ե뤫Ϥǽǡ桼󥿡 ե⤢ޤʲǤϡΥޥɤ椫餤Ĥºݤ˥ǥ󥹥 졼󤷤Ƥߤޤʤbc ư -q ѥ᡼ ƤΤϡư˥륫åϤʤǤ

        $ bc -q
        1 == 5
        0
        5 != 5
        0
        2 ^ 8
        256
        sqrt(9)
        3
        while (i != 9) { i = i + 1; print i }
        12345689
        quit

tput (üν terminfo ǡ١θ)

tput ʤˤǤ뤫ñ˾Ҳ𤷤ޤ

        $ tput cup 10 4

嵭ǤϡץץȤ (y10,x4) ΰ֤ˤޤ

        $ tput reset

嵭Ǥϡ̤Ȥᤷơ(y1,x1) ΰ֤˥ץץȤɽ (y0,x0) 礦ɺζˤ֤Ǥ

        $ tput cols
        80

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