mkisofs -J -r -o your.iso /your/files/
sudo add-apt-repository ppa:<ppa_name>
add-apt-repository ppa:webupd8team/java
sudo apt-get update
sudo apt-get install oracle-java7-installer
sudo apt-get install oracle-java8-installer
sudo update-java-alternatives -s java-7-oracle
(find / -xdev -print0 | xargs -0 du) | sort -k 1 -n -r > /disk_usage.txt
less /disk_usage.txt
kill -TERM -1234
pkill -TERM -P 1234