Question

有一个bash菜单，其中变量写入文件以进行mysql输入。继承人我所拥有的：

    echo "CREATE DATABASE '$mysqldbn';

#GRANT ALL PRIVILEGES ON *.* TO '$mysqlu'@'$myhost' IDENTIFIED BY '$mysqlup' WITH GRANT OPTION;

GRANT SELECT, INSERT, UPDATE, DELETE, CREATE, DROP, INDEX, ALTER, CREATE TEMPORARY TABLES, LOCK TABLES ON '$mysqldbn'.* TO '$mysqlu'@'$myhost' IDENTIFIED BY '$mysqlup';
GRANT SELECT, INSERT, UPDATE, DELETE, CREATE, DROP, INDEX, ALTER, CREATE TEMPORARY TABLES, LOCK TABLES ON '$mysqldbn'.* TO '$mysqlu'@'$myip' IDENTIFIED BY '$mysqlup';
GRANT SELECT, INSERT, UPDATE, DELETE, CREATE, DROP, INDEX, ALTER, CREATE TEMPORARY TABLES, LOCK TABLES ON '$mysqldbn'.* TO '$mysqlu'@'localhost' IDENTIFIED BY '$mysqlup';
GRANT SELECT, INSERT, UPDATE, DELETE, CREATE, DROP, INDEX, ALTER, CREATE TEMPORARY TABLES< LOCK TABLES on '$mysqldbn'.* TO '$mysqlu'@'$rip' IDENTIFIED BY '$mysqlup';" > nmysql.db


mysql -u root -p$mypass < nmysql.db

问题是获取变量以显示我必须将它们放在单引号中，单引号显示为我想要的'$ mysqlu'@'localhost'等实例。但是如何删除引号仍然可以在实例中使用变量，例如CREATE DATABASE'$ mysqldbn'？双引号也不会起作用，我不知所措。

提前致谢，乔

Answer 1

我在这里看不到您的问题，但您可以使用${mysqldbn}在bash中引用变量名称，这会有帮助吗？

Answer 2

您应该可以省略不需要它们的单引号。

但我建议使用这里的文件。大约：

mysql -u root -p$mypass <<EOF

CREATE DATABASE $mysqldbn;

#GRANT ALL PRIVILEGES ON *.* TO '$mysqlu'@'$myhost' IDENTIFIED BY '$mysqlup' WITH GRANT OPTION;

GRANT SELECT, INSERT, UPDATE, DELETE, CREATE, DROP, INDEX, ALTER, CREATE TEMPORARY TABLES, LOCK TABLES ON '$mysqldbn'.* TO '$mysqlu'@'$myhost' IDENTIFIED BY '$mysqlup';
GRANT SELECT, INSERT, UPDATE, DELETE, CREATE, DROP, INDEX, ALTER, CREATE TEMPORARY TABLES, LOCK TABLES ON '$mysqldbn'.* TO '$mysqlu'@'$myip' IDENTIFIED BY '$mysqlup';
GRANT SELECT, INSERT, UPDATE, DELETE, CREATE, DROP, INDEX, ALTER, CREATE TEMPORARY TABLES, LOCK TABLES ON '$mysqldbn'.* TO '$mysqlu'@'localhost' IDENTIFIED BY '$mysqlup';
GRANT SELECT, INSERT, UPDATE, DELETE, CREATE, DROP, INDEX, ALTER, CREATE TEMPORARY TABLES< LOCK TABLES on '$mysqldbn'.* TO '$mysqlu'@'$rip' IDENTIFIED BY '$mysqlup';
EOF

Answer 3

据我所知，你必须使用双引号来显示值，这是我的例子：

#!/bin/bash
myvar="MyValue"
echo "$myvar"
echo '$myvar'
echo '${myvar}'

生成：

MyValue
$myvar
${myvar}

希望这有帮助

BASH echo写入mysql输入

3 个答案: