From： http://blog.oddbit.com/2012/11/05/fedora-private-tmp/

發現 apache 的 /tmp 不是真的作業系統下的 /tmp

原因是在 /etc/systemd/system/multi-user.target.wants/httpd.service
/usr/lib/systemd/system/php70-php-fpm.service

裡面有一行 PrivateTmp=true ，改成 false　再重新 reload systemctl 的 daemon 即可


Grasping at straws I took a close look at the systemd service file for httpd, which looks like this:

[Unit]
Description=The Apache HTTP Server (prefork MPM)
After=syslog.target network.target remote-fs.target nss-lookup.target

[Service]
Type=forking
PIDFile=/var/run/httpd/httpd.pid
EnvironmentFile=/etc/sysconfig/httpd
ExecStart=/usr/sbin/httpd $OPTIONS -k start
ExecReload=/usr/sbin/httpd $OPTIONS -t
ExecReload=/bin/kill -HUP $MAINPID
ExecStop=/usr/sbin/httpd $OPTIONS -k stop
PrivateTmp=true

[Install]
WantedBy=multi-user.target

Browsing throught file the following line caught my eye:

PrivateTmp=true