Hi, Right now, I have three or four terminals open, with 1 to 5 tabs in each terminal, most are ssh out. In one terminal, I typed "more " just one blink, all those terminal-emulators gone. It's my first time meet this issue. So I wonder which may lead to this episode? Thanks, Best regards, $ dpkg --get-selections | grep termin gnome-terminal install gnome-terminal-data install terminal.app install