The command above has been changed due to very good constructive criticism - thanks x 2! This command can be used after acquiring mac's, ip's and hostname's or any of the above from a freshly scanned LAN. User must be root, and remember to change your settings on your network managing software manually (Fedc10 NetworkManager Applet 0.7.1 is mine) instead of 'auto DHCP'. You can also substitute eth0 for wlan0 etc - be good and ENJOY!

Useful for Maven multimodule projects, where you want to extract all packaged jar files.

Variant of find grep that ignores files with .svn in the name. Useful for searching through a local repository of source code.

Once issuing the command, hit "esc" and then "k" (not together) to enter the search mode at the shell prompt (each time), and invoke the search with "/" as if you would in vi. Type a command and see the most recently used instance of that command. Use "n" and "N" to go forward and backwards through other instances of that command.

*as long as the drives are exactly the same* then this command copies the partition table on /dev/sda to /dev/sdb

This is based on the Windows Version of VirtualBox.

From the /? ...

VBoxManage clonehd |

[--format VDI|VMDK|VHD|RAW|]

[--variant Standard,Fixed,Split2G,Stream,ESX]

[--type normal|writethrough|immutable|shareable]

[--remember] [--existing]

From the online help..

http://www.virtualbox.org/manual/ch08.html#id2676537

VBoxManage clonehd

This command duplicates a registered virtual hard disk image to a new image file with a new unique identifier (UUID). The new image can be transferred to another host system or imported into VirtualBox again using the Virtual Media Manager; see the section called ?The Virtual Media Manager? and the section called ?Cloning disk images?. The syntax is as follows:

VBoxManage clonehd |

[--format VDI|VMDK|VHD|RAW|]

[--variant Standard,Fixed,Split2G,Stream,ESX]

[--type normal|writethrough|immutable]

[--remember]

where the parameters mean:

format

Allow to choose a file format for the output file different from the file format of the input file.

variant

Allow to choose a file format variant for the output file. It is a comma-separated list of variant flags. Not all combinations are supported, and specifying inconsistent flags will result in an error message.

type

Only honored if --remember is also specified. Defines what kind of hard disk type this image should be.

remember

Keep the destination image registered after it was successfully written.

It takes a few seconds until it has figured out your public ip address. You need to have 'curl' installed of course.

The -R flag prevents you from making changes to a file, useful when you only want to view the file. This command is nicer than the 'more' or 'less' commands because for source codes, vi shows syntax highlight.

netstat has two lines of headers:

Active Internet connections (w/o servers)

Proto Recv-Q Send-Q Local Address Foreign Address State

Added a filter in the awk command to remove them

This download a complete audio podcast

Add this to .bashrc, then you can quickly create backups from files on current directory, but it only backups files on current directory.

useful when changing config files, coding something or just trying something stupid.

I needed this for wine.

If you receives a lot of compiling errors, type 'clear', then reedit your code and press "SHIFT+PGUP".

The pipe to head removes the listing of . as the largest directory.

Yeah, there are many ways to do that.

Doing with sed by using a for loop is my favourite, because these are two basic things in all *nix environments. Sed by default does not allow to save the output in the same files so we'll use mv to do that in batch along with the sed.