Erm, a slightly more useful answer: it allows you to run multiple console applications, or commands, in one terminal. Kind of like a tabbed terminal emulator. In fact, that's exactly what it is (just not done with the regular GUI toolkits)
Why is it so great? Simple, you can run a program in a screen session (Run screen and it runs your default shell, run screen myapp and it runs myapp in the session), hit ctrl+a (the screen control sequence) and then press d (ctrl+a,d) to detach.
The program keeps running in the background, but, unlike doing mycmd &, you can run screen -r to reattach the session, and everything is as you left it. You can send input to the command, if it's a curses UI, everything still works just like if it were a "real" terminal.
It's very popular with console IRC clients - you can run (say) screen irssi and reattach the session from anywhere you can SSH from.
A few useful commands:
ctrl+a, c to make a new virtual terminal (or "window") in the session
ctrl+a, n and ctrl+a, p to cycle through multiple windows
ctrl+a, 1 to select window 1, ctrl+a, 4 to select window 4 and so on
ctrl+a, ctrl+a to flick between the last two active windows
ctrl+a, shift+a (upper-case a) allows you to rename the current window
ctrl+a, ` (for me, that's shift+2 - the quote mark) lists windows, you can use the arrows and select one. Also useful with the "tab bar" setting I'll list in a second
A few other useful things I've stumbled across:
Use the -U flag when you launch screen so it supports Unicode (for example, screen -xU)
The -x flag allows you to reattach the same session multiple times. (-r disconnects existing connections)
You can do interesting stuff with the status bar. I have my setup to display [ hostname ][ 0-$ bash (1*$ irssi) ][16/09 9:32] (Running on hostname, it has two windows. This is set by the hardstatus lines in my .screenrc (at the end of the answer)
startup_message off
vbell off
hardstatus alwayslastline
hardstatus string '%{gk}[ %{G}%H %{g}][%= %{wk}%?%-Lw%?%{=b kR}(%{W}%n*%f %t%?(%u)%?%{=b kR})%{= kw}%?%+Lw%?%?%= %{g}]%{=y C}[%d/%m %c]%{W}'
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什么是GNU Screen？ 伟大的！
嗯，一个稍微有用的答案：它允许您在一个终端中运行多个控制台应用程序或命令。 有点像选项卡式终端模拟器。 事实上，这正是它的本质（只是没有使用常规 GUI 工具包完成）
为什么它如此出色？ 很简单，您可以在 screen 会话中运行程序（运行
screen它会运行您的默认 shell，运行screen myapp它会在会话中运行 myapp），点击 ctrl+a（屏幕控制序列），然后按 d（ctrl+a ,d) 分离。该程序在后台继续运行，但是，与
mycmd &不同，您可以运行screen -r来重新附加会话以及所有内容是你离开时的样子。 您可以将输入发送到命令，如果它是一个curses UI，一切仍然像“真实”终端一样工作。它在控制台 IRC 客户端中非常流行 - 您可以运行（例如）
screen irssi并从可以通过 SSH 的任何地方重新附加会话。一些有用的命令：
我偶然发现的其他一些有用的东西：
-U标志，以便它支持 Unicode（例如,screen -xU)-x标志允许您多次重新附加同一会话。 （-r断开现有连接）[ hostname ][ 0-$ bash (1*$ irssi) ][16/09 9:32]（在主机名上运行，它有两个窗口。这是由我的 .screenrc 中的 Hardstatus 行（在答案的末尾）What is GNU Screen? Great!
Erm, a slightly more useful answer: it allows you to run multiple console applications, or commands, in one terminal. Kind of like a tabbed terminal emulator. In fact, that's exactly what it is (just not done with the regular GUI toolkits)
Why is it so great? Simple, you can run a program in a screen session (Run
screenand it runs your default shell, runscreen myappand it runs myapp in the session), hit ctrl+a (the screen control sequence) and then press d (ctrl+a,d) to detach.The program keeps running in the background, but, unlike doing
mycmd &, you can runscreen -rto reattach the session, and everything is as you left it. You can send input to the command, if it's a curses UI, everything still works just like if it were a "real" terminal.It's very popular with console IRC clients - you can run (say)
screen irssiand reattach the session from anywhere you can SSH from.A few useful commands:
A few other useful things I've stumbled across:
-Uflag when you launch screen so it supports Unicode (for example,screen -xU)-xflag allows you to reattach the same session multiple times. (-rdisconnects existing connections)[ hostname ][ 0-$ bash (1*$ irssi) ][16/09 9:32](Running on hostname, it has two windows. This is set by the hardstatus lines in my .screenrc (at the end of the answer)