重新安装了NextCloud，因为之前一直报SSL 60错误
大概率是根证书问题，重装了服务器系统，更新了根证书，所以其他服务重新部署一遍。
重装NC过程中踩了不少坑。
现在把配置文件备份一下。

upstream php-handler {
    #server 127.0.0.1:9000;
    server unix:/tmp/php-cgi-74.sock;#此处修改为自己的php-fpm版本。
}
server
{
    listen 80;
	listen 443 ssl http2;
    server_name cloud.yourdomanin.com;
    index index.php index.html index.htm default.php default.htm default.html;
    root /your/nextcloud/path;
    
    #SSL-START SSL相关配置，请勿删除或修改下一行带注释的404规则
    #error_page 404/404.html;
    #HTTP_TO_HTTPS_START
    if ($server_port !~ 443){
        rewrite ^(/.*)$ https://$host$1 permanent;
    }
    #HTTP_TO_HTTPS_END
    ssl_certificate    /SSl/cert/path/fullchain.pem;
    ssl_certificate_key    /SSl/cert/path//privkey.pem;
    ssl_protocols TLSv1.1 TLSv1.2 TLSv1.3;
    ssl_ciphers EECDH+CHACHA20:EECDH+CHACHA20-draft:EECDH+AES128:RSA+AES128:EECDH+AES256:RSA+AES256:EECDH+3DES:RSA+3DES:!MD5;
    ssl_prefer_server_ciphers on;
    ssl_session_cache shared:SSL:10m;
    ssl_session_timeout 10m;
    add_header Strict-Transport-Security "max-age=31536000; includeSubDomains; preload;" always;
    error_page 497  https://$host$request_uri;

    #SSL-END
    #伪静态，去除index.php
    location / {
        rewrite ^ /index.php;
    }

    # 设置最大上传文件尺寸
    client_max_body_size 512M;
    fastcgi_buffers 64 4K;

    # 开启gzip压缩请不要移除ETag headers
    gzip on;
    gzip_vary on;
    gzip_comp_level 4;
    gzip_min_length 256;
    gzip_proxied expired no-cache no-store private no_last_modified no_etag auth;
    gzip_types application/atom+xml application/javascript application/json application/ld+json application/manifest+json application/rss+xml application/vnd.geo+json application/vnd.ms-fontobject application/x-font-ttf application/x-web-app-manifest+json application/xhtml+xml application/xml font/opentype image/bmp image/svg+xml image/x-icon text/cache-manifest text/css text/plain text/vcard text/vnd.rim.location.xloc text/vtt text/x-component text/x-cross-domain-policy;

    # 如果使用了 `ngx_pagespeed` 模组，可以取消此处的注释.
    #pagespeed off;

    # HTTP response headers borrowed from Nextcloud `.htaccess`
    add_header Referrer-Policy                      "no-referrer"   always;
    add_header X-Content-Type-Options               "nosniff"       always;
    add_header X-Download-Options                   "noopen"        always;
    add_header X-Frame-Options                      "SAMEORIGIN"    always;
    add_header X-Permitted-Cross-Domain-Policies    "none"          always;
    add_header X-Robots-Tag                         "none"          always;
    add_header X-XSS-Protection                     "1; mode=block" always;

    # Remove X-Powered-By, which is an information leak
    fastcgi_hide_header X-Powered-By;
    # Rule borrowed from `.htaccess` to handle Microsoft DAV clients
    location = / {
        if ( $http_user_agent ~ ^DavClnt ) {
            return 302 /remote.php/webdav/$is_args$args;
        }
    }

    location = /robots.txt {
        allow all;
        log_not_found off;
        access_log off;
    }

    # Make a regex exception for `/.well-known` so that clients can still
    # access it despite the existence of the regex rule
    # `location ~ /(\.|autotest|...)` which would otherwise handle requests
    # for `/.well-known`.
    location ^~ /.well-known {
        # The following 6 rules are borrowed from `.htaccess`

        location = /.well-known/carddav     { return 301 /remote.php/dav/; }
        location = /.well-known/caldav      { return 301 /remote.php/dav/; }
        # Anything else is dynamically handled by Nextcloud
        location ^~ /.well-known            { return 301 /index.php$uri; }

        try_files $uri $uri/ =404;
    }

    # Rules borrowed from `.htaccess` to hide certain paths from clients
    location ~ ^/(?:build|tests|config|lib|3rdparty|templates|data)(?:$|/)  { return 404; }
    location ~ ^/(?:\.|autotest|occ|issue|indie|db_|console)              { return 404; }

    # Ensure this block, which passes PHP files to the PHP process, is above the blocks
    # which handle static assets (as seen below). If this block is not declared first,
    # then Nginx will encounter an infinite rewriting loop when it prepends `/index.php`
    # to the URI, resulting in a HTTP 500 error response.
    location ~ \.php(?:$|/) {
        # Required for legacy support
        rewrite ^/(?!index|remote|public|cron|core\/ajax\/update|status|ocs\/v[12]|updater\/.+|oc[ms]-provider\/.+|.+\/richdocumentscode\/proxy) /index.php$request_uri;
        fastcgi_split_path_info ^(.+?\.php)(/.*)$;
        set $path_info $fastcgi_path_info;
        try_files $fastcgi_script_name =404;
        include fastcgi_params;
        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
        fastcgi_param PATH_INFO $path_info;
        fastcgi_param HTTPS on;
        fastcgi_param modHeadersAvailable true;         # Avoid sending the security headers twice
        fastcgi_param front_controller_active true;     # Enable pretty urls
        fastcgi_pass php-handler;

        fastcgi_intercept_errors on;
        fastcgi_request_buffering off;
    }
    location ~ \.(?:css|js|svg|gif)$ {
        try_files $uri /index.php$request_uri;
        expires 6M;         # Cache-Control policy borrowed from `.htaccess`
        access_log off;     # Optional: Don't log access to assets
    }
    location ~ \.woff2?$ {
        try_files $uri /index.php$request_uri;
        expires 7d;         # Cache-Control policy borrowed from `.htaccess`
        access_log off;     # Optional: Don't log access to assets
    }
    
    #禁止访问的文件或目录
    location ~ ^/(\.user.ini|\.htaccess|\.git|\.svn|\.project|LICENSE|README.md|data)
    {
        return 404;
    }    
    
    location ~ .*\.(gif|jpg|jpeg|png|bmp|swf)$
    {
        expires      30d;
        error_log /dev/null;
        access_log /dev/null;
    }
    
    location ~ .*\.(js|css)?$
    {
        expires      12h;
        error_log /dev/null;
        access_log /dev/null; 
    }
}

以上，大概率解除NC后台的部分权限问题。
其他的PHP设置需要禁用output_buffing参数，memory_limit设置到512M，
在PHP-FPM设置文件中加入
env[PATH] = /usr/local/bin:/usr/bin:/bin:/usr/local/php/bin
解除后台报错信息

PHP似乎没有设置好查询的系统环境变量。 用 getenv(“PATH”) 测试只返回一个空值。

以上的踩坑大概就这些，留存记录，以备后用。