root@ubuntu:/etc#?sudo?apt-get?update 錯誤:1?http://mirrors.yun-idc.com/ubuntu?bionic?InRelease ??暫時不能解析域名“mirrors.yun-idc.com” 錯誤:2?http://mirrors.yun-idc.com/ubuntu?bionic-security?InRelease ??暫時不能解析域名“mirrors.yun-idc.com” 錯誤:3?http://mirrors.yun-idc.com/ubuntu?bionic-updates?InRelease ??暫時不能解析域名“mirrors.yun-idc.com” 錯誤:4?http://mirrors.yun-idc.com/ubuntu?bionic-backports?InRelease ??暫時不能解析域名“mirrors.yun-idc.com” 錯誤:5?http://mirrors.yun-idc.com/ubuntu?bionic-proposed?InRelease ??暫時不能解析域名“mirrors.yun-idc.com” 正在讀取軟件包列表...?完成 W:?無法下載?http://mirrors.yun-idc.com/ubuntu/dists/bionic/InRelease??暫時不能解析域名“mirrors.yun-idc.com” W:?無法下載?http://mirrors.yun-idc.com/ubuntu/dists/bionic-security/InRelease??暫時不能解析域名“mirrors.yun-idc.com” W:?無法下載?http://mirrors.yun-idc.com/ubuntu/dists/bionic-updates/InRelease??暫時不能解析域名“mirrors.yun-idc.com” W:?無法下載?http://mirrors.yun-idc.com/ubuntu/dists/bionic-backports/InRelease??暫時不能解析域名“mirrors.yun-idc.com” W:?無法下載?http://mirrors.yun-idc.com/ubuntu/dists/bionic-proposed/InRelease??暫時不能解析域名“mirrors.yun-idc.com” W:?部分索引文件下載失敗。如果忽略它們，那將轉而使用舊的索引文件。 root@ubuntu:/etc#?vi?/etc/hosts root@ubuntu:/etc#?cat?/etc/resolv.conf? nameserver?223.5.5.5? root@ubuntu:/etc#?ping?223.5.5.5 PING?223.5.5.5?(223.5.5.5)?56(84)?bytes?of?data. 64?bytes?from?223.5.5.5:?icmp_seq=1?ttl=52?time=72.4?ms 64?bytes?from?223.5.5.5:?icmp_seq=2?ttl=52?time=76.8?ms 64?bytes?from?223.5.5.5:?icmp_seq=3?ttl=52?time=77.9?ms 64?bytes?from?223.5.5.5:?icmp_seq=4?ttl=52?time=69.4?ms 64?bytes?from?223.5.5.5:?icmp_seq=5?ttl=52?time=77.4?ms 64?bytes?from?223.5.5.5:?icmp_seq=6?ttl=52?time=49.4?ms 64?bytes?from?223.5.5.5:?icmp_seq=7?ttl=52?time=48.4?ms ^C ---?223.5.5.5?ping?statistics?--- 7?packets?transmitted,?7?received,?0%?packet?loss,?time?6017ms rtt?min/avg/max/mdev?=?48.486/67.435/77.980/12.017?ms root@ubuntu:/etc#?ping?mirrors.yun-idc.com PING?mirrors.yun-idc.com?(114.112.43.174)?56(84)?bytes?of?data. 64?bytes?from?114.112.43.174?(114.112.43.174):?icmp_seq=1?ttl=53?time=19.1?ms 64?bytes?from?114.112.43.174?(114.112.43.174):?icmp_seq=2?ttl=53?time=19.1?ms 64?bytes?from?114.112.43.174?(114.112.43.174):?icmp_seq=3?ttl=53?time=19.2?ms 64?bytes?from?114.112.43.174?(114.112.43.174):?icmp_seq=4?ttl=53?time=19.0?ms 64?bytes?from?114.112.43.174?(114.112.43.174):?icmp_seq=5?ttl=53?time=19.0?ms 64?bytes?from?114.112.43.174?(114.112.43.174):?icmp_seq=6?ttl=53?time=19.3?ms 64?bytes?from?114.112.43.174?(114.112.43.174):?icmp_seq=7?ttl=53?time=19.1?ms 64?bytes?from?114.112.43.174?(114.112.43.174):?icmp_seq=8?ttl=53?time=21.1?ms 64?bytes?from?114.112.43.174?(114.112.43.174):?icmp_seq=9?ttl=53?time=19.1?ms 64?bytes?from?114.112.43.174?(114.112.43.174):?icmp_seq=10?ttl=53?time=18.7?ms 64?bytes?from?114.112.43.174?(114.112.43.174):?icmp_seq=11?ttl=53?time=19.2?ms