老師,你把hello.sh放在/root下,執(zhí)行hello.sh的時(shí)候也是在/root下執(zhí)行的,在PATH上加不加上/root這個(gè)路徑都能執(zhí)行成功呀,應(yīng)該換個(gè)目錄來執(zhí)行hello.sh來驗(yàn)證!
2017-03-26
已采納回答 / 慕函數(shù)0111378
$@和$*都是表示“所有參數(shù)”。帶""時(shí)有如下區(qū)別"$*" 會(huì)變成 "$1 $2 $3 $4......",注意參數(shù)間帶著空格。"$@" 會(huì)變成 "$1" "$2" "$3"......for i in "$*" 轉(zhuǎn)化為 for i in "$0 $1 $2 $3 $4......",將用戶輸入的參數(shù)代入,"$*"是一個(gè)長字串。for y in "$@" 轉(zhuǎn)化為 for y in??"$1" "$2" "$3"...... , 代入?yún)?shù)后,有幾個(gè)字串for循環(huán)幾次,"$@"是個(gè)列表。不帶""的話,它們倆一...
2017-03-12