Package tour market, which is now dominated by a few large tour operators. The major operators are Thomson Holidays and First Choice part of TUI AG and Thomas Cook AG. Under these umbrella brands are different holiday operators catering to different markets, such as Club 18-30 or traveleze. Budget airlines have also created their own package holiday divisions such as Jet2 Holidays or Japan Airlines's J-Pack special. The trend for package holiday bookings saw a comeback in 2009, as customers sought greater financial security in the wake of a number of holiday and flight companies going bust, and as the hidden costs
Package manager will be required to take additional measures, such as manually managing some dependencies or integrating the changes into the package manager. There are tools available to ensure that locally compiled packages are integrated with the package management. For distributions based on .deb and .rpm files as well as Slackware Linux, there is CheckInstall, and for recipe-based systems such as Gentoo Linux and hybrid systems such as Arch Linux, it is possible to write a recipe first, which then ensures that the package fits into the local package database. Particularly troublesome with software upgrades are upgrades of configuration files. Since package