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5. Ñ¿ (variable)

Ñ¿È¤Ê¤×¥í¥°Ï¤Þ¤ó¡£¤bash ˤϥǡ (data type)Þ¤bash ѿϡʸʸǼ 뤳ȤǤޤ

ѿɬפϤʤȤ٤ѿͤС Ǥޤ

5.1 ץ: ѿȤä Hello World! 

        #!/bin/bash
        STR="Hello World!"
        echo $STR

2 ܤ STR Ȥѿäơ "Hello World" Ȥ ʸƤޤѿΡ͡פѿκǽ "$" ȤǼФޤ ⤷ "$" È¤È¤Ê¤Ã¤×¥í¥°Î½Ï¤Ï°ã¤¦Î¤È¤ ꡢ˾̤ʤȤȤò¤·¤(뤤ϼºݤˤäƤߤ)

5.2 ץ: ˥ץʥХååץץ() 

        #!/bin/bash          
        OF=/var/my-backup-$(date +%Y%m%d).tgz
        tar -cZf $OF /home/me/

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嵭ΥץȤϡޤǤȤϾ㤦ȤҲ𤷤Ƥޤޤܤˤ ѿκˤĤƤϤ⤦줿Ȼפޤ Ǥϡ"$(date +%Y%m%d)" ȤɽܤƤ ץȤ¹ԤȡݥåΤʤΥޥɤ¹ԤơνϤ ޤ褦ˤʤäƤޤ

ΥץȤǤϡdate ޥɤ(+%Y%m%d)Ȥ񼰥å˽ ơϤե̾Ѥ뤳ȤդƤä񼰤 뤳ȤǡȤϰۤʤե̾ˤ뤳ȤǤޤ

ʳλͻȤơ

  • echo ls
  • echo $(ls)
ȤäΤޤ

5.3 í¡¼Ñ¿

í¡¼Ñ¿Ï¡local ȤɤȤäƺ뤳ȤǤ Þ¤ 

        #!/bin/bash
        HELLO=Hello 
        function hello {
                local HELLO=World
                echo $HELLO
        }
        echo $HELLO
        hello
        echo $HELLO

í¡¼Ñ¿Î»È¤Ë¤Ä¤Æ¤Ï¡Ê¾Ç½Ê¬È»×¤Þ¤

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