到官網下載最新安裝檔案
wget http://sourceforge.net/projects/roundcubemail/files/roundcubemail-dependent/0.9.2/roundcubemail-0.9.2-dep.tar
tar -zxvf roundcubemail-0.9.2-dep.tar
cd roundcubemail-0.9.2-dep
原本的config設定檔可copy也可不copy，請記得先備份
cp -rf ./bin/ ./installer/ ./program/ ./SQL/ ./skins/ ./index.php ./LICENSE ./README.md ./robots.txt ./CHANGELOG ./composer.json-dist /var/www/webmail/
0.9.1 to 0.9.2版不需更新sql
官網的更新說明
Update 0.9.2 is out
We're proud to announce the second service release for the 0.9 series of Roundcube. It contains 25 bug fixes and improvements as well as some translation updates.
參考資料：
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