Commands by nerd65536

Commands by nerd65536 (4)

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Duplicate several drives concurrently

If you have some drive imaging to do, you can boot into any liveCD and use a commodity machine. The drives will be written in parallel. To improve efficiency, specify a larger block size in dd: dd if=/dev/sda bs=64k | tee >(dd of=/dev/sdb bs=64k) | dd of=/dev/sdc bs=64k To image more drives , insert them as additional arguments to tee: dd if=/dev/sda | tee >(dd of=/dev/sdb) >(dd of=/dev/sdc) >(dd of=/dev/sdd) | dd of=/dev/sde
This is sample output - yours may be different.
23

dd if=/dev/sda | tee >(dd of=/dev/sdb) | dd of=/dev/sdc

nerd65536 · 2009-12-11 17:34:38 35
Mount a .iso file in UNIX/Linux

"-o loop" lets you use a file as a block device
This is sample output - yours may be different.
47

mount /path/to/file.iso /mnt/cdrom -oloop

nerd65536 · 2009-02-05 17:28:06 35
Make bash look like DOS

Credit goes here: http://blag.xkcd.com/2008/12/03/some-lists/ Show Sample Output
This is sample output - yours may be different.
```
user@hostname:~$

becomes:

C:\home\user>
```
0

export PS1='C:${PWD//\//\\\}>'

nerd65536 · 2009-02-05 17:23:53 26
Resets a terminal that has been messed up by binary input
This is sample output - yours may be different.
1

reset

nerd65536 · 2009-02-05 17:18:48 20

What's this?

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Install pip with Proxy

Installs pip packages defining a proxy

extract email addresses from some file (or any other pattern)

Rename files in batch

Adding a startup script to be run at bootup Ubuntu

This script will run each time you boot up.The script must be in /etc/init.d directory.

Set laptop display brightness

Run as root. Path may vary depending on laptop model and video card (this was tested on an Acer laptop with ATI HD3200 video). $ cat /proc/acpi/video/VGA/LCD/brightness to discover the possible values for your display.

Get IP address from domain

shorter (thus better ;-)

Prepend a text to a file.

Using the sed -i (inline), you can replace the beginning of the first line of a file without redirecting the output to a temporary location.

Fix borked character coding in a tty.

Often you find some tty programs are messed up and confused about character encoding - 'man' is a common problem and sometimes displays weird characters for apostrophes, hyphens etc etc. Another class of programs that suffer from this are those that try to use the line drawing characters - eg RedHat's tty system admin functions such as system-config-firewall-tui system-config-network-tui etc. Adding 'LC_ALL=C' fixes most of these problems (as long as you want English! Perhaps speakers of other languages can add a comment here). For bonus points, I've added the '-c' option to the man command so that it ignores it's cache and re-computes the man page using the C locale.

Coping files, excluding certain files

Preserve file structure when coping and exclude some file o dir patterns

Limit the transfer rate and size of data over a pipe

This example will close the pipe after transferring 100MB at a speed of 3MB per second.

Stay in the loop…

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