Visualize data structures in perl
use Data::Dumper; print Dumper ($data);
Month: October 2013
Convert time interval from seconds to days, hours, minutes, seconds with perl.
use Time::Interval; $data = parseInterval(seconds => $intervalseconds); print “$data->{days} d $data->{hours} h $data->{minutes} m $data->{seconds} s\n”;
Create QR code via shell script or via console converting content to utf-8
echo ‘eat my shörts!’ | iconv -f iso-8859-1 -t utf8 | qrencode -t PNG -o /PATH/TO/eat_my_shorts.qr.png
watch and grep a growing active log file for some pattern
tail -f FILE | grep ‘PATTERN’
gentoo – otrs – emerge error – ‘chown $S not allowed’
SetPermissions.pl –otrs-user=otrs –web-user=apache –otrs-group=apache –web-group=apache “${S}” dies with “Could not set permissions” Caused by running emerge as user portage. This user has sometimes insufficient file rights. This is the default behaviour since 2013SEP, when the portage FEATURE userpriv was enabled per default. See man make.conf. Disable this FEATURE using the awesome /etc/portage/package.env file. Edit this […]
find word boundaries with grep
grep -w ‘stuff to find’
gentoo – enable initramfs
# emerge genkernel then mount the boot volume # genkernel –install initramfs edit the grub.conf: > title Gentoo Linux 3.10.7-gentoo > root (hd0,0) > kernel /boot/kernel-3.10.7-gentoo root=/dev/sda3 rootfstype=ext3 > initrd /boot/initramfs-genkernel-x86_64-3.10.7-gentoo do not forget to create a new initramfs in case of building new kernels
bytes and bones 
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