I have just installed Newscoop on a Debian 7 Wheezy, I have 25GB of free space, followed setupguide, changed PHP settings for filesize etc, and got this error, both in admin panel, and in command line backup.
Available disk space is <b>25.57 GiB.</b> The actual necessary space depends mostly on size of your database and multimedia files. If the backup does not succeed, try to create more free space, please.
* Backing up the database...sh: 1: Syntax error: ")" unexpected sh: 1: Syntax error: ")" unexpected
ERROR! Unable to create temporary archive. General error root@folketsforlag:/var/lib/newscoop#