- youtube A plus
- wekipidia
- safari books
- learn ms com
- ubuntu com
rtfm
- amazon books comptia
- certificate
anywhere- to help
church it
community college lab
home lab
georgetown it department
help desk
sec是info sys的子领域
vpl it
lufthansa
desktop helper
managed switch
homelab
sys admin
NAS
Linux - 电脑就可以做服务器