Set the perfect permissions for WordPress:

cd /path/to/wp/webroot; find . -type d -print0|xargs -0 chmod 755; find . -type f -print0|xargs -0 chmod 644; chown nginx:nginx * -R

*Update nginx:nginx to your web daemon user and group

Recently had an issue where I was unable to upload media within WordPress. Turned out the user and group in php-fpm’s www.conf was incorrect. To fix:

vim /etc/php-fpm.d/www.conf

user: nginx
group: nginx

Restart php-fpm

service php-fpm restart

tcpdump udp portrange 1000-5000 -w capture.pcap

The above can be opened with wireshark for inspection.

> /var/spool/mail/username

Disk space remains the same pre and post file deletion. It is likely a process is still using the deleted file. To get a list of deleted files which are still marked open by processes:

lsof +L1

COMMAND PID USER   FD   TYPE DEVICE SIZE/OFF NLINK    NODE NAME
tuned   111 root    7u   REG  202,2     4333091     0 2141 /tmp/jar_cache23323.tmp (deleted)

Simply kill the process to dump the file in question:

kill -9 111