Commands by abdullhashaikh (0)

  • bash: commands not found

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Create QR codes from a URL.
QR codes are those funny square 2d bar codes that everyone seems to be pointing their smart phones at. Try the following... $ qrurl http://xkcd.com Then open qr.*.png in your favorite image viewer. Point your the bar code reader on your smart phone at the code, and you'll shortly be reading xkcd on your phone. URLs are not the only thing that can be encoded by QR codes... short texts (to around 2K) can be encoded this way, although this function doesn't do any URL encoding, so unless you want to do that by hand it won't be useful for that.

check open ports without netstat or lsof

Print number of mb of free ram
Here we instead show a more real figure for how much free RAM you have when taking into consideration buffers that can be freed if needed. Unix machines leave data in memory but marked it free to overwrite, so using the first line from the "free" command will mostly give you back a reading showing you are almost out of memory, but in fact you are not, as the system can free up memory as soon as it is needed. I just noticed the free command is not on my OpenBSD box.

count how many times a string appears in a (source code) tree
grep -o puts each occurrence in a separate line

Replace spaces in filename
This command will replace spaces in filename with underscore, for all file in directory that contain spaces.

Search some text from all files inside a directory

determine if a shared library is compiled as 32bit or 64bit
Determines the flavor of a shared library by looking at the addresses of its exposed functions and seeing if they are 16 bytes or 8 bytes long. The command is written so the library you are querying is passed to a variable up font -- it would be simple to convert this to a bash function or script using this format.

Make vim open in tabs by default (save to .profile)
I always add this to my .profile rc so I can do things like: "vim *.c" and the files are opened in tabs.

Mount the first NTFS partition inside a VDI file (VirtualBox Disk Image)
Found at: http://forums.virtualbox.org/viewtopic.php?t=52

a short counter
Maybe you know shorter ?


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