Linux visual console

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 Linux界面：文本界面，图形界面
第一次文本切换图形：startx
第二次开启图形：startx -- :1
第三次开启图形：startx -- :2
图形切换文本：Alt+Ctrl+F1
图形间切换：Alt+Ctrl+F7
界面之间通讯：
text window: echo <content> > /dev/tty1
graphic window terminal: echo <content> > /dev/pts/0
文本切换图像：Alt+F7
图形彻底切换成文本：
1. 菜单中选择logout；
2. Alt+Ctrl+Backspace
文本界面一共有六个
查看当前为第几个界面：tty
文本界面之前切换：Alt+F1 ~ Alt+F6
锁屏：Ctrl+S （锁屏后只是屏幕不显示，但是操作仍旧有效）
解除锁屏：Ctrl+Q
查看控制台状态：w
关闭控制台：skill -9 pts/2
调整控制台数量：
vi /etc/inittab
删除标签 # Run gettys in standard runlevels下内容
 
Gname terminal
1. can open several terminal
2. <Ctrl+Shift+t>: open a new tab
3. <Ctrl+pgup/pgdn>: next/prev tab
4. <Alt-"n">: change to "n" terminal
5. <Ctrl+Shift+c>: copy
6. <Ctrl+Shift+v>: paste
7. <Ctrl+Shift+w>: close current terminal 

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