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works with fractions like 1/3.5
identica is an open source social networking and micro-blogging service. Based on Laconica, a micro-blogging software package built on the OpenMicroBlogging specification.
http://identi.ca/
I like to label my grub boot options with the correct kernel version/build.
After building and installing a new kernel with "make install" I had to edit my grub.conf by hand.
To avoid this, I've decided to write this little command line to:
1. read the version/build part of the filename to which the kernel symlinks point
2. replace the first label lines of grub.conf
grub.conf label lines must be in this format:
Latest [{name}-{version/build}]
Old [{name}-{version/build}]
only the {version/build} part is substituted.
For instance:
title Latest [GNU/Linux-2.6.31-gentoo-r10.201003]
would turn to
title Latest [GNU/Linux-2.6.32-gentoo-r7.201004]"
ZSH ships a couple random number generators via the $RANDOM environment variable and rand48() via zsh/mathfunc, but neither are cryptographically secure. This code produces a 32-bit random number suitable for cryptography. It's only dependency is /dev/urandom and it does not rely on any shell commands or 3rd party utilities. It assumes ZSH was compiled with 64-bit integer support.
Suppose you made a backup of your hard disk with dd:
dd if=/dev/sda of=/mnt/disk/backup.img
This command enables you to mount a partition from inside this image, so you can access your files directly.
Substitute PARTITION=1 with the number of the partition you want to mount (returned from sfdisk -d yourfile.img).
Create a directory named with the current date in ISO 8601 format (yyyy-mm-dd). Useful for storing backups by date. The --iso switch may only work with GNU date, can use format string argument for other date versions.
Show the webcam output with mplayer.
When you start screen as `ssh-agent screen`, agent will die after detatch.
If you don't want to take care about files when stored agent's pid/socket/etc, you have to use this command.