Centos 7 user management

1. After creating a user, the user's home folder is based on/Etc/skel/The file copied under is equivalent to the main directory template.

2. Yum-related operations

YumCheck-UpdateCheck software updates; YUM update package_name install updates; YUM update install all updates.

Yum search package name, available * and? Symbol search; YUM search all registration, slow search, more detailed

Yum list package name, same as above

Yum List Installed Package name, which is found in installed

Yum list available registration, all available