一些小问题

vi — Tue, 06 Apr 2010 08:55:46 +0000

1)问题描述:如果多个帐户都用root 来登录怎么看另一个用户使用的那些命令

解决方法：vi /etc/profile

增加以下内容:

export PROMPT_COMMAND=’{ date “+[ %Y%m%d %H:%M:%S `whoami` ] `history 1 | { read x cmd; echo “$cmd from ip:$SSH_CLIENT $SSH_TTY”; }`”; }>> /home/pu/login.log’

保存退出，通过source /etc/profile立即生效！

需要注意的事，有可能通过open-ssh客户端软件登陆后，环境变量PROMPT_COMMAND 还是，保持默认值，只需要退出，然后，重新登陆即可.

2010-04-2

1)问题描述:scp 如何拷贝目录

答:scp -r 目录名 user@ip:/user

2010-04-06

1)问题描述：linux下挂载usb设备，一个u盘对应4个part问题，用fdisk -l 显示如下信息:

Disk /dev/sdb: 1023 MB, 1023409152 bytes
32 heads, 61 sectors/track, 1023 cylinders
Units = cylinders of 1952 * 512 = 999424 bytes
This doesn’t look like a partition table
Probably you selected the wrong device.

Device Boot Start End Blocks Id System
/dev/sdb1 ? 398636 983425 570754815+ 72 Unknown
Partition 1 has different physical/logical beginnings (non-Linux?):
phys=(357, 116, 40) logical=(398635, 6, 23)
Partition 1 has different physical/logical endings:
phys=(357, 32, 45) logical=(983424, 30, 61)
Partition 1 does not end on cylinder boundary.
/dev/sdb2 ? 86419 1078237 968014120 65 Novell Netware 386
Partition 2 has different physical/logical beginnings (non-Linux?):
phys=(288, 115, 43) logical=(86418, 26, 1)
Partition 2 has different physical/logical endings:
phys=(367, 114, 50) logical=(1078236, 17, 53)
Partition 2 does not end on cylinder boundary.
/dev/sdb3 ? 957932 1949749 968014096 79 Unknown
Partition 3 has different physical/logical beginnings (non-Linux?):

解决方法：重新分区，fdisk /dev/sda ，先删除四个分区，然后在重新新建一个主分区，按W保存退出，用mkfs.ext3 进行格式化.

2)问题描述:mysql binlog日志非常大，如何删除,如：

mysql>show binary logs;

1.1G mysql-bin.000319
1.1G mysql-bin.000320
1.1G mysql-bin.000321
1.1G mysql-bin.000322
1.1G mysql-bin.000323
1.1G mysql-bin.000324
1.1G mysql-bin.000325
1.1G mysql-bin.000326
1.1G mysql-bin.000327
1.1G mysql-bin.000328
1.1G mysql-bin.000329
1.1G mysql-bin.000330

解决方法：

#purge master logs to ‘mysql-bin.000330′; (方法1）

#purge binary logs to ‘mysql-bin.000330′; (方法2）

#方法三：

配置my.cnf,增加expire_logs_days=10

如果在运行状态下修改，set global expire_logs_days=10;

转载：http://blog.myspace.cn/e/406829013.htm
感谢木易水平

mysql root密码

vi — Fri, 15 Jan 2010 07:46:32 +0000

备份下。老是记不得命令。这下子不用再百度了。

打开命令行窗口，停止mysql服务： Net stop mysql
启动mysql，一般到mysql的安装路径，找到 mysqld-nt.exe
执行：mysqld-nt –skip-grant-tables 当前窗口将会停止。
另外打开一个命令行窗口，执行mysql 如果提示没有这个命令，先进入MYSQL的安装位置下BIN目录再运行mysql>use mysql
>update user set password=password(“viyin.net”) where user=”root”;
>flush privileges;
>exit

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一些小问题

mysql root密码