I want to do at first hyperledger fabric environment set up, I go in the installation environment docker docker compose is ok and took a snapshot, but in the fabric pull docker mirror when I found my environment variable has a problem, I will modify the/etc/profile environment variables in this file, and still no I will try to restore the snapshot but return to the previous a docker compose the installation is complete when not on the net, then I modify the manage by online says=true restart up or not, then I restart the system, good yao, black screen into not to go, I said online methods such as winsock reset, cancel the 3 d, and I have tried in the operation of the command line is still doesn't work, and now no matter which snapshot cannot surf the Internet to + restart the black screen, so I want to know isn't taking a snapshot of the virtual machine all current configuration backup, that even after I accidentally changed the system files, don't restore the snapshot system file not reply?? This two week I installed the system, crying, beg god guide!!!!!!