RCWM: 3月 2010

2010年3月31日星期三

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子丑寅卯辰巳午未申酉戌亥

子丑寅卯辰巳午未申酉戌亥

甲乙丙丁戊己庚辛壬癸

乾三連，坤六斷；

震仰盂，艮覆碗；

離中虛，坎中滿；

兌上缺，巽下斷。

巽離坤

震兌

艮坎乾

Telnet services setup

Telnet服?的配置步?如下:

一、安?telnet?件包(通常要??）

1、 telnet-client (或 telnet)，???件包提供的是 telnet 客?端程序；

2、 telnet-server ，???件包提供的是 telnet 服?器端程序；

安?之前先??是否?些?件包已安?，方法如下：

[root@wljs root]#rpm -q telnet或[root@wljs root]#rpm -q telnet-client

[root@wljs root]#rpm -q telnet-server

如果?有??到?件包，需要?行安?，red hat linux 9默?已安?了telnet?件包，一般只要安?telnet-server?件包。

1、在red hat linux 9的安??中?取telnet-server-0.17-25.i386.rpm?件包。

2、安??件包

[root@wljs root]#rpm -i telnet-server-0.17-25.i386.rpm

二、??telnet服?

1、??服?

方法一：使用ntsysv,在出?的窗口之中，? telnet前面*加上，然后按下 OK 。

方法二：?? /etc/xinetd.d/telnet

[root@wljs root]# vi /etc/xinetd.d/telnet

找到 disable = yes ? yes 改成 no 。

2、激活服?

[root@wljs root]# service xinetd restart

三、??服?

[root@wljs root]#telnet ip(或者hostname）

如果配置正确，系?提示?入?程机器的用?名和密?

Password:

注：默?只允?普通用?

四、?置telnet端口

#vi /etc/services

?入??模式后查找telnet(vi??方式下?入/telnet)

?找到如下?容：

telnet 23/tcp

telnet 23/udp

?23修改成未使用的端口?(如：2000)，退出vi，重?telnet服?，telnet默?端口?就被修改了。

五、Telnet服?限制

telnet是明文?送口令和?据的，如果你?其默?的?置不?意，有必要?其服?范??行限制。假?你的主机的ip是210.45.160.17，就可以按如下方式?置了，^_^!

#vi /etc/xinetd.d/telnet

service telnet

{

disable = no #激活 telnet 服?,no

bind = 210.45.160.17 #your ip

only_from = 210.45.0.0/16 #只允? 210.45.0.0 ~ 210.45.255.255 ??网段?入

only_from = .edu.cn #只有教育网才能?入！

no_access = 210.45.160.{115,116} #???ip不可登?

access_times= 8:00-12:00 20:00-23:59 # 每天只有?????段?放服?

......

}

六、Telnet root用?的登入

telnet 不是很安全，默?的情?之下不允? root 以 telnet ?入 Linux 主机。若要允?root用?登入，可用下列方法：

[root @wljs /root]# vi /etc/pam.d/login

#auth required pam_securetty.so #??一行加上注?！

或

[root@wljs root]# mv /etc/securetty /etc/securetty.bak

??， root 就可以直接?入 Linux 主机了。不?，建?不要??做。也可以在普通用??入后，切?到root用?,?有root的?限。

Configuring Telnet/FTP to login as root (Linux)

Configuring Telnet/FTP to login as root (Linux)

by Jeff Hunter, Sr. Database Administrator

---------------------------

Red Hat Enterprise Linux: RHEL3 / RHEL4

Red Hat (Fedora Core 1 / Core 2)

Red Hat (Release 7.x - 8.x)

----------------------

Red Hat Enterprise Linux: RHEL3 / RHEL4

Enabling Telnet and FTP Services

Linux is configured to run the Telnet and FTP server, but by default, these services are not enabled. To enable the telnet service, login to the server as the root user account and run the following commands:

# chkconfig telnet on

# service xinetd reload

Reloading configuration: [ OK ]

Starting with the Red Hat Enterprise Linux 3.0 release (and in CentOS Enterprise Linux), the FTP server (wu-ftpd) is no longer available with xinetd. It has been replaced with vsftp and can be started from /etc/init.d/vsftpd as in the following:

# /etc/init.d/vsftpd start

Starting vsftpd for vsftpd: [ OK ]

If you want the vsftpd service to start and stop when recycling (rebooting) the machine, you can create the following symbolic links:

# ln -s /etc/init.d/vsftpd /etc/rc3.d/S56vsftpd

# ln -s /etc/init.d/vsftpd /etc/rc4.d/S56vsftpd

# ln -s /etc/init.d/vsftpd /etc/rc5.d/S56vsftpd

Allowing Root Logins to Telnet and FTP Services

Now before getting into the details of how to configure Red Hat Linux for root logins, keep in mind that this is VERY BAD security. Make sure that you NEVER configure your production servers for this type of login.

Configure Telnet for root logins

Simply edit the file /etc/securetty and add the following to the end of the file:

pts/0

pts/1

pts/2

pts/3

pts/4

pts/5

pts/6

pts/7

pts/8

pts/9

This will allow up to 10 telnet sessions to the server as root.

Configure FTP for root logins

Edit the files /etc/vsftpd.ftpusers and /etc/vsftpd.user_list and remove the 'root' line from each file.

---------------------------

Red Hat (Fedora Core 1 / Core 2)

Enabling Telnet and FTP Services

Linux is configured to run the Telnet and FTP server, but by default, these services are not enabled. To enable the telnet these service, login to the server as the root userid and edit the files:

/etc/xinetd.d/telnet

In this file, find the line for disable and change it from the value "yes" to "no".

After changing the above value(s), you will need to restart the xinetd deamon. As the root userid, type the following command:

% /etc/init.d/xinetd reload

Starting with the Fedora Core 1 release, the FTP server (wu-ftpd) is no longer available with xinetd. It has been replaced with vsftp and can be started from /etc/init.d/vsftpd as in the following:

# /etc/init.d/vsftpd start

If you want the vsftpd service to start and stop when recycling the machine, you can create the following symbolic links:

# ln -s /etc/init.d/vsftpd /etc/rc3.d/S56vsftpd

# ln -s /etc/init.d/vsftpd /etc/rc4.d/S56vsftpd

# ln -s /etc/init.d/vsftpd /etc/rc5.d/S56vsftpd

Allowing Root Logins to Telnet and FTP Services

Now before getting into the details of how to configure Red Hat Linux for root logins, keep in mind that this is VERY BAD security. Make sure that you NEVER configure your production servers for this type of login.

Configure Telnet for root logins

/etc/securettySimply edit the file and add the following to the end of the file:

pts/0

pts/1

pts/2

pts/3

pts/4

pts/5

pts/6

pts/7

pts/8

pts/9

This will allow up to 10 telnet sessions to the server as root.

Configure FTP for root logins

Edit the files /etc/vsftpd.ftpusers and /etc/vsftpd.user_list and remove the 'root' line from each file.

---------------------------

Red Hat (Release 7.x - 8.x)

Enabling Telnet and FTP Services

Linux is configured to run the Telnet and FTP server, but by default, these services are not enabled. To enable these services, login to the server as the root userid and edit the files:

/etc/xinetd.d/telnet

/etc/xinetd.d/wu-ftpd

In both files, find the line for disable and change it from the value "yes" to "no".

After changing the above values, you will need to restart the xinetd deamon. As the root userid, type the following command:

% /etc/init.d/xinetd reload

Allowing Root Logins to Telnet and FTP Services

Now before getting into the details of how to configure Red Hat Linux for root logins, keep in mind that this is VERY BAD security. Make sure that you NEVER configure your production servers for this type of login.

Configure Telnet for root logins

Simply edit the file /etc/securetty and add the following to the end of the file:

pts/0

pts/1

pts/2

pts/3

pts/4

pts/5

pts/6

pts/7

pts/8

pts/9

This will allow up to 10 telnet sessions to the server as root.

Configure FTP for root logins

First edit the file /etc/ftpaccess and comment out the 'deny-uid' and 'deny-gid' lines.

Also, don't forget to remove the 'root' line from /etc/ftpusers

House

查閱政府的索引圖有冇路可行車

*花園是否有入契

*是否有僭建物

*內部是否有改建

*丁權是否要補地價

一般每層30萬補地價

*屋前是否再起屋

*發展商是否有原居民授權交易

*是否低窪地帶

*去水問題化糞池

Linux Command

[System Services]

/usr/sbin/setup

[check sshd status]

netstat -a | more

tcp 0 0:ssh *:* LISTEN

-----------------------------

[start httpd]

cd /etc/rc.d/init.d/

then type:

./httpd start

[start mysql]

cd /etc/rc.d/init.d/

then type:

./mysqld start

[start telnet]

Edit the file /etc/xinetd.d/telnetd

changing the two lines to:

# default: on

disabled = no

then try doing this

/etc/rc.d/init.d/xinetd restart

[ftp]

Edit the file /etc/xinetd.d/wu-ftpd

changing the two lines to:

# default: on

disabled = no

then run the command

/etc/rc.d/init.d/xinetd restart

------------------------------------------

# chkconfig telnet on

# service xinetd reload

Reloading configuration: [ OK ]

-----------------------------------------

[Configure Telnet for root logins]

#Simply edit the file /etc/securetty and add the following to the end of the file:

pts/0

pts/1

pts/2

pts/3

pts/4

pts/5

pts/6

pts/7

pts/8

pts/9

This will allow up to 10 telnet sessions to the server as root.

-----------------------------------------

??/etc/xinetd.d/telnet

把disable=yes修改?disable=no，

保存退出；

#service xinetd restart

Distributed File System (DFS)

Distributed File System (DFS)

Reply by Luis Colon (GE)

1)What type of data (text, photo, etc) will be stored in DFS?

Photos, Badge Designs, Signatures and Alarm Graphics.

2)What is the usual Data Volume to be synchronize between the three DB through WAN?

Depends on the size of the system. Each transaction (alarm and badge) are roughly 1kb in size. You would have to calculate the expected system activity and proceed from there.

3)What is the recover procedure if any one of the Regional Server down?

It's a manual process. After the Regional is back to full operation, you would have to initiate a manual recovery from the Client Form.

4)What is the mechanism of SP DFS Synchronization?

Standard, Microsoft DFS technology. This is a Windows technology that has nothing to do with SP.

Please provide your clients using SP Global system with DFS configuration.

5)All Global systems in the US and abroad are using DFS, as this is a requirement for the setup.

MS free Sync tool

MS free Sync tool

Microsoft offers free file-synchronization tool

Serdar Yegulalp, Contributor

10.17.2005

Rating: -4.57- (out of 5)

Once upon a time, you could find files in only two places -- either on your computer's hard drive or on a floppy disk. But these days, there's more media than ever: USB flash drives, external FireWire hard disks, packet-written DVD+RWs that mount like removable drives, network shares, cameras and phones that double as removable disks and so on. Synchronizing files between computers and removable devices has become exponentially more difficult. The Briefcase function in Windows covers some of this territory, but it has gone largely unused: Most people find it too unintuitive or don't even know it exists.

Microsoft has come to the rescue with a freeware tool called SyncToy. Written for Windows XP and Windows 2003 and higher (since it uses the .NET framework), SyncToy uses a very simple methodology for keeping any two pairs of folders in sync.

The user defines a pair of folders and the synchronization actions between them that will need to be performed. The program refers to the two folders as the "left" and "right" folders, according to their positions in the program's display. For instance, if you have a removable drive you want to keep synchronized with a folder on your desktop, you can define the removable drive as the left half of the pair and the desktop folder as the right half. The program can then run one of a set of actions against the two folders:

Synchronize: New and updated files are copied in both directions. Anything renamed or deleted on one drive is renamed or deleted on the other. Most people will want to use this option. By default, overwritten files are copied to the Recycle Bin, so they can be recovered if need be.

Echo: New and updated files are copied left to right. Anything renamed or deleted in the left folder is also done in the right folder.

Subscribe: Updated files on the right are copied to the left, provided the left-hand folder has a file with that name.

Contribute: New and updated files are copied left to right. Renames are echoed in that direction, but nothing will be deleted.

Combine: New and updated files are copied in both directions. Nothing is renamed or deleted.

If you're not sure if a particular action will be what you need, you can always click Preview in the folder pair's action page to see what the results of running the selected action will be. There are other copying options that, for instance, let you include or exclude specific subfolders and/or let you decide whether or not you want it to check the contents of files (if they're the same run length) as a criterion for change.

Windows File Syn

Once upon a time, you could find files in only two places -- either on your computer's hard drive or on a floppy disk. But these days, there's more media than ever: USB flash drives, external FireWire hard disks, packet-written DVD+RWs that mount like removable drives, network shares, cameras and phones that double as removable disks and so on. Synchronizing files between computers and removable devices has become exponentially more difficult. The Briefcase function in Windows covers some of this territory, but it has gone largely unused: Most people find it too unintuitive or don't even know it exists.