由于此地板涉嫌违规，因此它将折叠在系统中以隐藏此地板并显示此地板
root @ Ubuntu-virtual-machine :/home/Ubuntu # sudo apt-getinstallopenssh-server
Reading package lists. Done
reading state信息. done
thefollowingextrapackageswillbeinstalled :
ncurses-term ssh-import-id
Suggested packages:
rssh Molly-guard OpenSSH-black list OpenSSH-black list-extramonkeysphere
thefollowingnewpackageswillbeinstalled :
ncurses-term OpenSSH-serverssh-import-id
0升级，3新安装，0 to remove and 0 not upgraded。
Need to get 775 kB of archives。
After this操作，3，066 kbofadditionaldiskspacewillbeused。
Do you want to continue tmdmz/n]？ y
warning : thefollowingpackagescannotbeauthenticated！
ncurses-term OpenSSH-serverssh-import-id
installthesepackageswithoutverification [ y/n ]？ y
err http://us.archive.Ubuntu.com/Ubuntu/quantal/main ncurses-termall 5.9-10 Ubuntu 1
404 not found [ IP :91.189.91.1580 ]
err http://us.archive.Ubuntu.com/Ubuntu/quantal/main OpenSSH-serveri 3861:6.0 P1-3 Ubuntu 1
404 not found [ IP :91.189.91.1580 ]
err http://us.archive.Ubuntu.com/Ubuntu/quantal/main ssh-import-idall 2.12-0 Ubuntu 1
404 not found [ IP :91.189.91.1580 ]
failedtofetch http://us.archive.Ubuntu.com/Ubuntu/pool/main/n/ncurses/ncurses-term _ 5.9-10 u u u u all
failedtofetch http://us.archive.Ubuntu.com/Ubuntu/pool/main/o/OpenSSH/OpenSSH-server _ 6.0p1-3Ubuntu1_ in
failedtofetch http://us.archive.Ubuntu.com/Ubuntu/pool/main/s/ssh-import-id/ssh-import-id _ 2.12-0 ubu 0
e : unabletofetchsomearchives，mayberunapt-getupdateortrywith---- fix-missing？