The latest version of the Ubuntu operating system for desktop PCs and laptops, Ubuntu 18.10 comes with nine months, until July 2019, of security and maintenance updates.

PS：系统最小化安装的。
sougou pinyin install
$ sudo apt install fcitx
语言支持-键盘输入法系统-fcitx
$ sudo dpkg -i sogoupinyin_2.2.0.0108_amd64.deb
$ sudo apt -f install
$ sudo reboot

Adobe Flash Player install
方法一：
下载适应于linux系统的tar包
https://fpdownload.adobe.com/get/flashplayer/pdc/31.0.0.122/flash_player_npapi_linux.x86_64.tar.gz
$ tar -zxvf flash_player_npapi_linux.x86_64.tar.gz
$ sudo cp libflashplayer.so /usr/lib/firefox-addons/plugins
$ sudo cp -r usr /usr
  将解压的usr目录里的所有文件都拷贝到 /usr
方法二：
$ sudo apt install flashplugin-installer

LibreOffice install
$ sudo tar -xzvf LibreOffice_6.1.2_Linux_x86-64_deb.tar.gz -C /opt
$ sudo tar -xzvf LibreOffice_6.1.2_Linux_x86-64_deb_langpack_zh-CN.tar.gz -C /opt
$ sudo unzip SourceHanSansCN.zip   # 思源黑体
$ sudo unzip SourceHanSerifCN.zip   # 思源宋体
$ sudo dpkg -i ./LibreOffice_6.1.2.1_Linux_x86-64_deb/DEBS/.deb
$ sudo dpkg -i ./LibreOffice_6.1.2.1_Linux_x86-64_deb_langpack_zh-CN/DEBS/.deb
$ sudo mv SourceHanS* /usr/share/fonts/
$ sudo fc-cache -fv

Foxit Reader install
$ sudo tar -xvzf FoxitReader.enu.setup.2.4.4.0911.x64.run.tar.gz -C /opt
$ sudo ./FoxitReader.enu.setup.2.4.4.0911(r057d814).x64.run
弹出图形化安装界面后一步步操作即可

SecureCRT install
$ sudo dpkg -i scrt-8.5.1-1764.ubuntu18-64.x86_64.deb
注册信息如下，亲测可用：
Name:meisi
Company:TEAM ZWT
Serial Number:03-14-367662
License Key:ACCFAX R9FHJ7 QZVS2P JPBCVA ABCMBF HNEJ2T R9EVZN 2EEK2Q
Issue Date:01-30-2018

$ sudo dpkg --purge scrt
--purge删除安装文件和配置文件