旧版Ubuntu下载地址

https://old-releases.ubuntu.com/releases/

下载离线包

sudo apt-get --download-only -o=dir::cache=/ncayu install net-tools

下载snmp离线安装包

sudo apt-get --download-only -o=dir::cache=/root/snmp install snmp snmpd snmp-mibs-downloader

sudo apt-get --download-only -o=dir::cache=/root/ncayu install vim

root@heyu-virtual-machine:~# ntpdate time.nist.gov 
13 Oct 14:12:28 ntpdate[30343]: adjust time server 132.163.97.1 offset -0.069826 sec
root@heyu-virtual-machine:~# 
root@heyu-virtual-machine:~# 
root@heyu-virtual-machine:~# ntpdate ntp.aliyun.com
13 Oct 14:13:08 ntpdate[31348]: adjust time server 203.107.6.88 offset -0.021694 sec
root@heyu-virtual-machine:~# 

下载ssh工具

sudo apt-get --download-only -o=dir::cache=/root/ubuntu-ssh install openssh-server

批量安装离线包

sudo dpkg -i --force-depends *.deb

卸载安装包

apt-get --purge remove openssh-server