Linux first logon and online help

PS: This article is a summary of my personal studies. The reference book is the third edition of "linux Private food for laruence-basic learning ".
1. I personally think that the first LOGIN should be familiar with the GNOME Environment and check the options in the taskbar at the top of each screen so that they can be easily found in future settings, for example, you can enter the system task block When configuring the system and device. The location task block can enter the main folder and the file directory and disk mounted by the system. The upper right corner shows the power supply, the sound observation Configuration window, and some opened translation software are also displayed. 1
The other small configurations are not described in detail, because each of them can be set according to your preferences.
2. Chinese Input Method problem: the default Chinese Input Method in CentOS is SCIM. You can also learn to install the input method such as fcitx. Switch from the English input to the SCIM input method and press the combination key [ctrl] + [space] to call it, in addition, you can switch to the SCIM English input status when writing a document, press the [Shift] key, switch to the English input, and press [Shift] again to switch to the Chinese input.
3. command Line Mode Switching: icecream encountered problems when playing linux of various versions, and realized the power and convenience of command line mode, even to the point that makes me suffer (joke ~), In Ubuntu11.04, there is a Unity plug-in, which is similar to Apple's shock. Many software shortcuts can be placed on it, however, when I randomly modify Unity's special effect settings and encounter plug-in conflicts, I don't know how to handle them, that is, simply go to yes
Point no, causing Unity to crash and shut down. I cannot perform any operations. There is no shortcut on the desktop, and I didn't know how many shortcut keys to handle it at the time (I don't know it now ), after checking the internet, you must log on to and restart Unity using text lines .... switch the GNOME (X Window) GUI to the command line mode. Press the shortcut key [Crtl] + [Alt] + [F1 ~ F6] F1 ~ F6 is named as tty1 ~ Tty6 operation interface environment, and then perform your user login steps, after processing, [Crtl] + [Alt] + [F7] switch back to the graphic interface. F1 ~ F6 is caused by run
Level: tty7 is the graphic interface environment.
4. in addition to the software required for installation, do not log on with the ROOT account easily, because the ROOT account gives you unlimited operation permissions, an English dialog box may pop up in your operation, and the system crashes ......................

I want to know more about my personal summary.