Hi All, When trying to install libache2-mod-php using apt-get install libapache2-mod-php5, I get the following error: /usr/share/apache2/apache2-maintscript-helper: line 291: [: !=: unary operator expected apache2_switch_mpm prefork: No action required dpkg: error processing package libapache2-mod-php5 (--configure): subprocess installed post-installation script returned error exit status 1 Full process here: After this operation, 9,876 kB of additional disk space will be used. Selecting previously unselected package libapache2-mod-php5. (Reading database ... 170031 files and directories currently installed.) Preparing to unpack .../libapache2-mod-php5_5.6.19+dfsg-0+deb8u1_amd64.deb ... Unpacking libapache2-mod-php5 (5.6.19+dfsg-0+deb8u1) ... Setting up libapache2-mod-php5 (5.6.19+dfsg-0+deb8u1) ... php5_invoke: Enable module opcache for apache2 SAPI php5_invoke: Enable module sqlite3 for apache2 SAPI php5_invoke: Enable module xmlrpc for apache2 SAPI php5_invoke: Enable module pdo_sqlite for apache2 SAPI php5_invoke: Enable module xcache for apache2 SAPI php5_invoke: Enable module recode for apache2 SAPI php5_invoke: Enable module imagick for apache2 SAPI php5_invoke: Enable module json for apache2 SAPI php5_invoke: Enable module intl for apache2 SAPI php5_invoke: Enable module pspell for apache2 SAPI php5_invoke: Enable module imap for apache2 SAPI php5_invoke: Enable module memcached for apache2 SAPI php5_invoke: Enable module tidy for apache2 SAPI php5_invoke: Enable module pdo_mysql for apache2 SAPI php5_invoke: Enable module xsl for apache2 SAPI php5_invoke: Enable module pdo for apache2 SAPI php5_invoke: Enable module readline for apache2 SAPI php5_invoke: Enable module mysqli for apache2 SAPI php5_invoke: Enable module snmp for apache2 SAPI php5_invoke: Enable module mysql for apache2 SAPI php5_invoke: Enable module mcrypt for apache2 SAPI php5_invoke: Enable module curl for apache2 SAPI php5_invoke: Enable module gd for apache2 SAPI php5_invoke: Enable module memcache for apache2 SAPI /usr/share/apache2/apache2-maintscript-helper: line 291: [: !=: unary operator expected apache2_switch_mpm prefork: No action required dpkg: error processing package libapache2-mod-php5 (--configure): subprocess installed post-installation script returned error exit status 1 Errors were encountered while processing: libapache2-mod-php5 E: Sub-process /usr/bin/dpkg returned an error code (1) I have tried removing and apt-get -f install. Thanks Steve