Commands by d3Xt3r

Commands by d3Xt3r (3)

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Extract the MBR ID of a device

Useful when you want to know the mbrid of a device - for the purpose of making it bootable. Certain hybridiso distros, for eg the OpenSUSE live ISO uses the mbrid to find the live media. Use this command to find out the mbrid of your USB drive and then edit the /grub/mbrid file to match it. Show Sample Output
This is sample output - yours may be different.
```
0x8de54e0a
```
2

dd if=/dev/sda bs=1 count=4 skip=$((0x1b8)) 2>/dev/null | hexdump -n4 -e '"0x%x\n"'

d3Xt3r · 2011-07-30 02:42:32 4
Retrieve the size of a file on a server

- Where $URL is the URL of the file. - Replace the $2 by $3 at the end to get a human-readable size. Credits to svanberg @ ArchLinux forums for original idea. Edit: Replaced command with better version by FRUiT. (removed unnecessary grep)
This is sample output - yours may be different.
5

wget --spider $URL 2>&1 | awk '/Length/ {print $2}'

d3Xt3r · 2011-07-03 00:14:58 11
Displays the current time using HTTP

This command will show the current GMT time using HTTP. This might be useful if you just want to know what's the current human-readable and accurate-enough time, without changing the system time, using a simple command that would work regardless of the availability of NTP. Note: To get a quicker and more accurate response, replace google.com with your local NTP server. Also can be used as an alternative to the "htpdate" program: http://www.commandlinefu.com/commands/view/668/set-your-computers-clock-using-http-and-htp-http-time-protocol-when-ntpsntp-is-not-available Show Sample Output
This is sample output - yours may be different.
```
Date: Fri, 24 Jun 2011 10:57:16 GMT
```
2

curl -Is google.com | grep Date

d3Xt3r · 2011-06-24 11:19:47 4

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Clean all .pyc files from current project. It cleans all the files recursively.

Count accesses per domain

count the times a domain appears on a file which lines are URLs in the form http://domain/resource.

Binary difference of two files

Upload/download newer version of any file with less size and high speed. To remake the new file use $bspatch

Progress bar for MySQL import

Print out the progress of MySQL import using the pv command. Updates every second.

back up your commandlinefu contributed commands

Use `zless` to read the content of your *rss.gz file: $ zless commandlinefu-contribs-backup-2009-08-10-07.40.39.rss.gz

Replace the content of an XML element

Replaces "650" with "999" in simple.xml. xml used - http://www.w3schools.com/xml/simple.xml

view the system memory in clear text

see what's in your memory right now... sometimes you find passwords, account numbers and url's that were recently used. Anyone have a safe command to clear the memory without rebooting?

Lists unambigously names of all xml elements used in files in current directory

This set of commands was very convenient for me when I was preparing some xml files for typesetting a book. I wanted to check what styles I had to prepare but coudn't remember all tags that I used. This one saved me from error-prone browsing of all my files. It should be also useful if one tries to process xml files with xsl, when using own xml application.

Image to color palette generator

Extract a color palette from a image useful for designers. Example usage: $extract-palette myawesomeimage.jpg 4 Where the first argument is the image you want to extract a palette from. The second argument is the number of colors you want. It may be the case where you want to change the search space. In that case, change the -resize argument to a bigger or smaller result. See the ImageMagick documentation for the -resize argument.

Check command history, but avoid running it

!whatever will search your command history and execute the first command that matches 'whatever'. If you don't feel safe doing this put :p on the end to print without executing. Recommended when running as superuser.

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