How To Do Eveything With DD
Written by AwesomeMachine - 2005-10-04 21:53

The real dd command

The basic command is structured as follows:

dd if= of= bs=(usually some power of 2, not less than 512 bytes(ie, 512, 1024, 2048, 4096, 8192, 16384, but can be any number.) skip= seek= conv=.

Source is the data being read. Target is where the data gets written. If you mess up, and accidentally reverse the source and target, you can wipe out a lot of data.

Examples::

Copy one hard disk partition to another hard disk:

dd if=/dev/sda2 of=/dev/sdb2 bs=4096 conv=notrunc,noerror

This tells how to create and maintain a shared directory on BioComp.
This is useful when at least two people in a group need to modify common
files in a project directory.

The default on BioComp is that users in a group can read each other's
files but not write them (users cannot read files in someone else's
group). It is fairly easy to implement shared directories by creating
subdirectories under a group member's username using UNIX protection
modes -- specifically the group mode -- to allow all group members to write
into the shared directory.

Useful Commands

?

Show ? Online help

show interface ? Online help

show interface serial 1 (sho int s1) sho interfaces activity of serial port 1

show interface ethernet 1(sho int e1) sho interfaces activity of ethernet port 1

show configuration (sho conf) show your routers saved configuration

show line sho the information on all your modem lines

show line 1 show the information of modem line 1

show modem show information of your modem

telnet command ...telnet xxx.xxx.xxx.xxx