mysql --prompt

 mysql --prompt修改命令行链接mysql时的提示符，shell脚本示例如下

#!/bin/bash

case $1 in
    crm) cmd='mysql  -h192.168.1.2 -uroot -proot -P3306 -Dcrm'
;;
*)
    echo "数据库变量不存在:$1 仅支持输入 crm"
    exit 0
;;
esac
shift 1
$cmd --prompt="[\u@\h:\p(\d) \R:\m:\s] mysql>" --default-character-set=utf8 -A "$@"

在命令行输入 db crm 执行效果如下

liuzhao ~ $ db crm
Warning: Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 54706839
Server version: 5.5.40-36.1-log Percona Server (GPL), Release 36.1, Revision 707

Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

[root@192.168.1.2:3306(crm) 16:59:15] mysql>

 --prompt选项列表，示例脚本中用到的选项已经标红

\c	A counter that increments for each statement you issue
\D	当前日期
\d	当前数据库
\h	数据库主机
\l	The current delimiter (new in 5.1.12)
\m	当前时间（分）
\n	A newline character
\O	The current month in three-letter format (Jan, Feb, …)
\o	The current month in numeric format
\P	am/pm
\p	The current TCP/IP port or socket file 端口号
\R	当前时间（小时）(0–23)
\r	当前时间（小时）(1–12)
\S	Semicolon
\s	当前时间（秒）
\t	A tab character
\U	Your full user_name@host_name account name
\u	数据库用户名
\v	The server version
\w	The current day of the week in three-letter format (Mon, Tue, …)
\Y	The current year, four digits
\y	The current year, two digits
\_	A space
\	A space (a space follows the backslash)
\'	Single quote
\"	Double quote
\\	A literal “\” backslash character
\x	x, for any “x” not listed above