Clear history of QuickTime Player on Mac OS X

  • To clear recent items, File>Open Recent>Clear Menu
  • To prevent the history from being created, run the following commands in Terminal:
    defaults write NSRecentDocumentsLimit 0
    defaults delete RecentDocuments
    defaults write RecentDocuments -dict-add MaxAmount 0

Clear history of MplayerX for Mac

Open Terminal and type the following command:
defaults delete org.niltsh.MPlayerX.LSSharedFileList RecentDocuments
To prevent history from being created:
defaults write org.niltsh.MPlayerX NSRecentDocumentsLimit 0

Ubuntu: system wide proxy settings

  • edit /etc/bash.bashrc
    export http_proxy=
    export https_proxy=
    export ftp_proxy=
    export no_proxy=localhost,,,*,172.23.65.*