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The MySQL server mysqld
can be started and run by any user.
In order to change mysqld
to run as a Unix user user_name
, you must
do the following:
mysqladmin shutdown
).
user_name
has
privileges to read and write files in them (you may need to do this as
the Unix root
user):
shell> chown -R user_name /path/to/mysql/datadir |
If directories or files within the MySQL data directory are
symlinks, you'll also need to follow those links and change the directories
and files they point to. chown -R
may not follow symlinks for
you.
user_name
, or, if you are using
MySQL Version 3.22 or later, start mysqld
as the Unix root
user and use the --user=user_name
option. mysqld
will switch
to run as the Unix user user_name
before accepting any connections.
user
line that specifies the username to
the [mysqld]
group of the `/etc/my.cnf' option file or the
`my.cnf' option file in the server's data directory. For example:
[mysqld] user=user_name |
At this point, your mysqld
process should be running fine and dandy as
the Unix user user_name
. One thing hasn't changed, though: the
contents of the permissions tables. By default (right after running the
permissions table install script mysql_install_db
), the MySQL
user root
is the only user with permission to access the mysql
database or to create or drop databases. Unless you have changed those
permissions, they still hold. This shouldn't stop you from accessing
MySQL as the MySQL root
user when you're logged in
as a Unix user other than root
; just specify the -u root
option
to the client program.
Note that accessing MySQL as root
, by supplying -u
root
on the command-line, has nothing to do with MySQL running
as the Unix root
user, or, indeed, as another Unix user. The access
permissions and usernames of MySQL are completely separate from
Unix usernames. The only connection with Unix usernames is that if you
don't provide a -u
option when you invoke a client program, the client
will try to connect using your Unix login name as your MySQL user
name.
If your Unix box itself isn't secured, you should probably at least put a
password on the MySQL root
users in the access tables.
Otherwise, any user with an account on that machine can run mysql -u
root db_name
and do whatever he likes.
On Windows, you can install MySQL 4.0.17 and MySQL 4.1.2 as services as a normal user. (Older MySQL versions required you to have administrator rights; This was a bug introduced in MySQL 3.23.54).
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