avconv -i DP4U12.ogv -vcodec copy -acodec copy -ss 00:00:00 -t 00:04:20 DP4U12_complete.ogv
The above command preserves the same format of the input file, where:
DP4U12.ogv is the input file
DP4U12_complete.ogv is the output file
The command cuts the video from the beginning till 4 minutes 20 seconds.
I couldn’t extract an archive that I downloaded from edelivery which was in 3 files, 1.zip, 1.z01 and 1.z02:
In order to extract on Ubuntu, do the following:
zip -s- Input.zip -O output.zip
This will gather the Input.zip file and all following .z0x in one file called output.zip, which you can then extract and do whatever you want on it, e.g
zip -s- dac_win_11g_infa_win_64bit_901.zip -O output.zip
The following command was needed after upgrading the VirtualBox version to install the new version of the extension pack and replace the old one:
sudo VBoxManage extpack install –replace Oracle_VM_VirtualBox_Extension_Pack-4.2.12-84980.vbox-extpack
This is a must-know for those who love some old extensions that are no longer compatible with their new upgrade of gnome shell, since many extensions are already compatible with the new versions of the gnome-shell, but all what differs is that this is not explicitly stated in the meta-data file.
My system is on Ubuntu 13.04 beta with Gnome 3.8.
Here are the steps:
export hobba=ksjdjf123ksks
export nokka=`sed “s/[^0-9]//g” <<< $hobba`
echo $nokka
123
Sources: http://stackoverflow.com/questions/13055889/sed-with-a-literal-string-not-input-file, http://stackoverflow.com/questions/6388046/extract-integer-from-string-using-bash
Just Some Techie Notes! 