Commands by inductiveload (1)

  • Convert an SVG to PNG and then crush the filesize brutally with pngcrush. Good for icons and website junk that you want to keep small, expecially before base64 encoding. Uses inkscape, not imagemagick, as IM doesn't always handle gradients well. This way also seems to sometime save some file size (eg. 619 with Inkscape compared to 695 with IM). IM can do general images: img2png(){ png="${1%.*}.png"; convert -background none "$1" "$png" && pngcrush -brute -rem alla -rem text "$png" "$" && mv "$" "$png"; }

    svg2png(){ png="${1%.*}.png"; inkscape --export-png="$png" --without-gui "$1" && pngcrush -brute -rem alla -rem text "$png" "$" && mv "$" "$png";}
    inductiveload · 2013-05-08 15:21:52 0

What's this? is the place to record those command-line gems that you return to again and again. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.

Share Your Commands

Check These Out

Take screenshots with imagemagick

Virtualbox: setup hardware
where - memory 256 assign 256 Mb RAM - acpi on enable ACPI (mandatory if you use Winfog 2000 - ioapic off disable the IO APIC. Not useful if you use one CPU (on virtual machine or a 32 bit operative system). As ACPI, this switch is mandatory for Winbug 2000 - pae on enable the Phisical Address Extension how to use more than 4Gb of RAM on x86 CPU - hwvirtex on enables hardware virtualization extensions for microprocessors that have this feature (which should be also enabled in the BIOS of the motherboard) - nestedpaging on allows part of the processes of memory management hardware are made directly

Getting the last argument from the previous command

Switch 2 characters on a command line.
If you typed 'sl', put the cursor on the 'l' and hit ctrl-t to get 'ls'.

List out classes in of all htmls in directory
Lists out all classes used in all *.html files in the currect directory. usefull for checking if you have left out any style definitions, or accidentally given a different name than you intended. ( I have an ugly habit of accidentally substituting camelCase instead of using under_scores: i would name soemthing counterBox instead of counter_box) WARNING: assumes you give classnames in between double quotes, and that you apply only one class per element.

Make sure a script is run in a terminal.
Exit with error if script is not run in a terminal

move all files older than 60 days to a folder

password recovery on debian
Appended to grub boot parameters ... gives shell ... password recovery

Adding Prefix to File name
Good old bracket expansion :-) For large numbers of files, "rename" will spare you the for-loop, or the find/exec...

notify brightness level [custom]
Brightness indicator to be used in scripts that adjust brightness [especially sys that doesn't support automatically]

Stay in the loop…

Follow the Tweets.

Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.


Subscribe to the feeds.

Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):

Subscribe to the feed for: