参考网上经验，写了个WP文件权限设置脚本。方便部署迁移只用。
#!/bin/bash
# $1 => wp_path
if [ 0 -eq $# ]; then
exit
fi
if [ ! -d "${1}" ]; then
echo invalid path.
exit
fi
cd ${1}
if [ ! -d "./wp-content/" ]; then
echo wordpress not found.
exit
fi
chgrp www-data ./ -R
chmod 644 ./ -R
chmod 755 ./
find ./ -type d -exec chmod 755 {} \;
find ./ -iname "*.php" -exec chmod 644 {} \;
chmod 775 ./wp-content/
chmod 775 ./wp-content/plugins/
chmod 775 ./wp-content/themes/
find ./wp-content/themes/ -iname "*.php" -exec chmod 664 {} \;
find ./wp-content/themes/ -iname "*.css" -exec chmod 664 {} \;
chmod 644 ./wp-content/themes/index.php
if [ -d "./wp-content/uploads" ]; then
chmod 664 ./wp-content/uploads/ -R
chmod 775 ./wp-content/uploads/
find ./wp-content/uploads/ -type d -exec chmod 775 {} \;
fi
if [ -d "./wp-content/upgrade" ]; then
chmod 775 ./wp-content/upgrade/
fi
echo done.