CentOS 7

1. You need to see the format of your software package,

if you have yum, you can directly Yum remove XXX
if it is RPM package, RPM - e XXX
tar package, you need to directly delete the file or make universal XXX
these are the three common ones.

2. Formal operating environment, the system can be considered to install stable version.

3. You are all the same here, but the download image website is different. Just find a quick address

4. sed -i '1a nameserver 8.8.8.8' /etc/resolv.conf
yum -y install traceroute

5. This is the CPU to turn on the virtualization switch, if the CPU does not support 32-bit system, do not install 64 bit system

6. Whether you are using 7.3 or 6.7, the version in the installation source should be consistent with the current system version

7. Basically, the process is similar to the previous version, and there is not much change. According to the tutorial to practice it, what specific questions to ask.

8. Exception in thumbnail buffer
it is recommended to run disk cleaning, check the thumbnail, and then the system will re-establish all folder thumbnails.

9. Hello
this is not very clear
because I am really not good at this kind of problem
I suggest the landlord to ask the corresponding classification again
so that someone can answer it
I hope it will help you