How to block indexing by search bots for multiple websites in Plesk for Linux?

Add the following nginx web server additional directives to all domains that for which you would like to block search bots by using the steps in this article:

CONFIG_TEXT: if ($http_user_agent ~ SputnikBot|omgili|socialmediascanner|Jooblebot|SeznamBot|Scrapy|CCBot|linkfluence|veoozbot|Leikibot|Seopult|Faraday|hybrid|Go-http-client|SMUrlExpander|SNAPSHOT|getintent|ltx71|Nuzzel|SMTBot|Laserlikebot|facebookexternalhit|mfibot|OptimizationCrawler|crazy|Dispatch|ubermetrics|HTMLParser|musobot|filterdb|InfoSeek|omgilibot|DomainSigma|SafeSearch|CommentReader|meanpathbot|statdom|proximic|spredbot|StatOnlineRuBot|openstat|DeuSu|semantic|postano|masscan|Embedly|NewShareCounts|linkdexbot|GrapeshotCrawler|Digincore|NetSeer|help.jp|PaperLiBot|getprismatic|360Spider|Ahrefs|ApacheBench|Aport|Applebot|archive|BaiduBot|Baiduspider|Birubot|BLEXBot|bsalsa|Butterfly|Buzzbot|BuzzSumo|CamontSpider|curl|dataminr|discobot|DomainTools|DotBot|Exabot|Ezooms|FairShare|FeedFetcher|FlaxCrawler|FlightDeckReportsBot|FlipboardProxy|FyberSpider|Gigabot|HTTrack|ia_archiver|InternetSeer|Jakarta|Java|JS-Kit|km.ru|kmSearchBot|Kraken|larbin|libwww|Lightspeedsystems|Linguee|LinkBot|LinkExchanger|LinkpadBot|LivelapBot|LoadImpactPageAnalyzer|lwp-trivial|majestic|Mediatoolkitbot|MegaIndex|MetaURI|MJ12bot|MLBot|NerdByNature|NING|NjuiceBot|Nutch|OpenHoseBot|Panopta|pflab|pirst|PostRank|crawler|ptd-crawler|Purebot|PycURL|Python|QuerySeekerSpider|rogerbot|Ruby|SearchBot|SemrushBot|SISTRIX|SiteBot|Slurp|Sogou|solomono|Soup|spbot|suggybot|Superfeedr|SurveyBot|SWeb|trendictionbot|TSearcher|ttCrawler|TurnitinBot|TweetmemeBot|UnwindFetchor|urllib|uTorrent|Voyager|WBSearchBot|Wget|WordPress|woriobot|Yeti|YottosBot|Zeus|zitebot|ZmEu|Crowsnest|PaperLiBot|peerindex|ia_archiver|Slurp|Aport|NING|JS-Kit|rogerbot|BLEXBot|MJ12bot|Twiceler|Baiduspider|Java|CommentReader|Yeti|discobot|BTWebClient|Tagoobot|Ezooms|igdeSpyder|AhrefsBot|Teleport|Offline|DISCo|netvampire|Copier|HTTrack|WebCopier) {
return 444;
}

As an alternative, a robots.txt file can be created (for each domain that needs to block search bots) in the domain's document root directory (by default it is /var/www/vhosts/example.com/httpdocs/) and this file will disallow access to bots for the whole website. The code that must be placed within the robots.txt file in order to achieve this is the following:

CONFIG_TEXT: User-agent: *
Disallow: /