解决xtrabackup MySQL server: Access denied

Can't locate Digest/MD5.pm in @INC (@INC contains: /usr/local/lib/perl5 /usr/local/share/perl5 /usr/lib/perl5/vendor_perl /usr/
share/perl5/vendor_perl /usr/lib/perl5 /usr/share/perl5 .) at - line 693.
BEGIN failed--compilation aborted at - line 693.
220415 10:41:59 Connecting to MySQL server host: localhost, user: backup, password: set, port: 3306, socket: /export/servers/data
/my3306/run/mysqld.sock
Failed to connect to MySQL server: Access denied for user 'backup'@'localhost' (using password: YES)

在使用xtrabackup 命令进行全量备份的时候，（命令如下）

xtrabackup --defaults-file=/export/my.cnf --user=backup --password=xxxxxxx --stream=tar --slave-info --tmpdir=/export/xtrabackup --backup --target -dir=/export/xtrabackup

里面使用了用户名和密码，这里存在一个问题是，这个密码的内容里不能包括特殊字符“$”，否则就会报上面的错误，请修改密码去吧。