Roundcube is a browser-based multilingual IMAP client with an application-like user interface. It provides full functionality you expect from an email client, including MIME support, address book, folder manipulation, message searching and spell checking.
1) Login to SSH (Using putty)
2) Backup old roundcube configuration.
mkdir /home/roundcube_backup
cp -R /usr/local/apache/htdocs/roundcube/* /home/roundcube_backup
3) Download latest version of roundcube.
wget https://downloads.sourceforge.net/project/roundcubemail/roundcubemail/1.1.3/roundcubemail-1.1.3.tar.gz
tar zxvf roundcubemail-1.1.3.tar.gz
cd roundcubemail-1.1.3
4) Proceed with the installation
bin/installto.sh /usr/local/apache/htdocs/roundcube
Press “y”
Press “y”
5) Change to correct permission.
chown -R nobody:nobody /usr/local/apache/htdocs/roundcube
