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¡¡¡¡ÔÚLinuxÃüÁîÖо­³£´øÓвÎÊýÀýÈç[-option]µÈµÈ¡£ÔÚÃüÁîÐÐÖпÉÄÜÓÐ0¸ö»òÕß¶à¸öÕâЩѡÏî¡£ÎÒÃÇÔÚ֮ǰѧϰÁËλÖòÎÊý£¬°üÀ¨$1£¬$2£¬$3…£¬$*£¬$#£¬²Î¼ûLinux Bash Shellѧϰ£¨Æß£©£ºshell±à³Ì»ù´¡——ÔËÐÐShell½Å±¾¡¢function
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ÒÆÎ»Shift
¡¡¡¡shiftÌṩ¶ÔÖ»¶ÁµÄλÖòÎÊýµÄÒÆÎ»¸³ÖµµÄ²Ù×÷£¬½«1=$2£¬2=$3£¬…£¬¿ÉÒÔʹÓÃshift NÀ´Öƶ¨ÒÆÎ»µÄÊýÄ¿£¬ÀýÈçshift 3£¬Ôò±íʾ1=$4£¬2=$5£¬…¡£Èç¹ûÃüÁîÐÐÖÐÓÐ[-options]µÄ£¬ÎÒÃÇ¿ÉÒÔ¶ÔËûÃǽøÐÐÅжϣ¬²¢½øÐÐÒÆÎ»´¦Àí¡£Ò»¸ö¼òµ¥Àý×ÓÈçÏ£º
if [ $1 = -o ]; then

   
[process the -o option] 

    shift

fi

[normal processing of arguments...]
¡¡¡¡ÏÂÃæ¸øÁ½¸öÀý×Ó£¬½éÉÜÈçºÎÓÃshiftÀ´¼ì²é²ÎÊý¡£
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function test1

{

    #¶ÔÓÚgrep£¬^±íʾ´ÓÆ¥ÅäÐÐÊ×£¬$±íʾƥÅäÐÐ⣬ÔÚÕâÀï±íʾÕû¸ö$1Æ¥Å䣬¶ø²»ÊDz¿·ÖÆ¥Å䣬*±íÊ¾Ç°ÃæµÄ×Ö·ûÆ¥Åä0¸ö»òÕß¶à¸ö£¬ÏÂÃæ[0-9]*¼´±íʾºóÃæ¸ú×Å0¸ö»òÕß¶à¸öÊý×Ö£¬[0-9][0-9]*±íʾÊý×ÖºóÃæÓÐ0¸ö»ò¶à¸öÊý×Ö¡£¹Êecho $1 | grep '^-[0-9][0-9]*$'±íʾƥÅä¸ñʽ-N£¬NΪÊý×Ö¡£grepµÄ¾ßÌåÓ÷¨¿´²Î¼ûhttp://www.yesadmin.com/301/135287/index.html
 
    #$(command)±íʾÃüÁîÖ´ÐеÄÄÚÈÝ¡£

    #-n str£¬×Ö·û´®²»Îªnull£¬³¤¶È´óÓÚÁã

    #Çë×¢ÒâË«ÒýºÅµÄʹÓ㬱íʾÕâÊÇÒ»¸öÐèÒª¼ì²éµÄstr
   
    if [ -n "$(echo $1 | grep '^-[0-9][0-9]*$')"
]; then

        howmany=$1

       shift

    elif [ -n "$(echo $1 | grep '^-')" ]; then

  &nbs


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service iptables save
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iptables-save
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vi /etc/sysconfig/iptables Ìí¼ÓÏàÓ¦µÄ¹æÔò
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-A RH-Firewall-1-INPUT -p tcp -m state --state NEW -m tcp --dport 80 -j ACCEPT
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