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Raw Queries and Responses

1. Shard Calculation

Query:

Response:

Calculated Shard: 181 (from laksa050)

2. Crawled Status Check

Query:

curl -X POST \
  'http://laksa181.int.ahrefs:8124/' \
  -H 'Content-Type: text/plain' \
  -H 'X-ClickHouse-Database: crawler3' \
  -H 'Authorization: Basic YXBpOg==' \
  -d 'SELECT getAhrefsURLFromUnparsed(src_unparsed) AS found_url, ifNull(toUnixTimestamp(download_stamp), 0) AS crawl_time, ifNull(toUnixTimestamp(props_url_first_seen), 0) AS first_indexed_time, download_http_code AS http_code, src_unparsed AS src_unparsed, src_root_hash AS src_root_hash, history_drop_reason AS history_drop_reason, meta_title AS meta_title, meta_descriptions AS meta_descriptions, attrs_boilerpipe_text AS attrs_boilerpipe_text, attrs_markdown AS attrs_markdown, attrs_readable_markdown AS attrs_readable_markdown, meta_canonical AS meta_canonical FROM crawler3.page_info_local FINAL PREWHERE (src_root_hash, src_unparsed) IN ((getAhrefsRootHashFromUnparsed(getAhrefsUnparsedNoserviceFromURL(\'https://maxchadwick.xyz/blog/linux-screen-cheatsheet\')), getAhrefsUnparsedNoserviceFromURL(\'https://maxchadwick.xyz/blog/linux-screen-cheatsheet\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/maxchadwick.xyz\/blog\/linux-screen-cheatsheet","crawl_time":1768430571,"first_indexed_time":1524959847,"http_code":200,"src_unparsed":"xyz,maxchadwick!\/blog\/linux-screen-cheatsheet s443","src_root_hash":"3060307996292955781","history_drop_reason":null,"meta_title":"Linux Screen Cheatsheet | Max Chadwick","meta_descriptions":["A quick reference of useful commands for interacting with the Linux screen utility,"],"attrs_boilerpipe_text":"Published: April 25, 2018\nThere are a few of these, but none have all the answers that I want (e.g. how to scroll back up the terminal while attached to a screen session) or are in a format I like. So, I’ve prepared my own.\nThis is a cheatsheet of how to do the things I typically need to do with Linux (unix)’s\nscreen\ncommand…\nStart A New Screen Session\n$ screen -S [name]\nName is just an alias for the screen session so that it can easily be distinguished what’s happening in that session when looking at a list of all screen sessions via\nscreen -ls\n.\nDetach From The Current Screen Session\nctrl-a d\nIn order to detach from a screen session hold the control key and press “a”. Then press the “d” key.\nYou’ll be back a command prompt like the below after doing so.\n[detached from 28882.db-dump]\n$\nList Running Screen Sessions\n$ screen -ls\nAs mentioned above\nscreen -ls\nwill list running screen sessions. Here’s a sample of the output\n$ screen -ls\nThere are screens on:\n\t28882.db-dump\t(Detached)\n\t46174.mw-scan\t(Detached)\n2 Sockets in \/var\/run\/screen\/S-mchadwick.\nRe-attach to a Screen Session\nscreen -r [name-or-pid]\nscreen -r\nwill allow you to re-attach to a running screen session. You can use the id or name of the screen session.\nScroll up while attached to a screen session\nctrl-a esc\nWhile attached to a screen session, hold the control key and press “a”. Then press escape. At this point you’ll be able to scroll up and down within the screen session.\nPress escape again to regain the ability to enter commands.\nKill the screen session you’re currently attached to\nctrl-a k\nWhile attached to a screen session, hold the control key and press “a”, then press “k”. You’ll need to then press “y” to confirm you’d really like to kill the screen session.\nDetach a screen from another terminal and attach to it\n$ screen -d -r [name]\nYou may have to do this if you unexpectedly lost an SSH connection while attached to a screen session. In this case the\nscreen\nsession may still think it’s connected to that SSH connection (e.g. orphaned). The above command will detach it from that terminal and re-attach it to the current terminal.","attrs_markdown":"- [Home](https:\/\/maxchadwick.xyz\/)\n- [Blog](https:\/\/maxchadwick.xyz\/blog\/)\n- [Talks](https:\/\/maxchadwick.xyz\/talks)\n- [Projects](https:\/\/maxchadwick.xyz\/projects)\n\n# Linux Screen Cheatsheet\n#### Published: April 25, 2018\n**Tags:**\n\n- [Shell](https:\/\/maxchadwick.xyz\/tags\/#shell)\n- [Tools](https:\/\/maxchadwick.xyz\/tags\/#tools)\n\n![:pencil2:](https:\/\/github.githubassets.com\/images\/icons\/emoji\/unicode\/270f.png) [Improve this page on GitHub](https:\/\/github.com\/mpchadwick\/mpchadwick.github.io\/edit\/master\/_posts\/2018-04-25-linux-screen-cheatsheet.md)\n\nThere are a few of these, but none have all the answers that I want (e.g. how to scroll back up the terminal while attached to a screen session) or are in a format I like. So, I’ve prepared my own.\n\nThis is a cheatsheet of how to do the things I typically need to do with Linux (unix)’s `screen` command…\n\n### Start A New Screen Session\n```\n$ screen -S [name]\n```\nName is just an alias for the screen session so that it can easily be distinguished what’s happening in that session when looking at a list of all screen sessions via `screen -ls`.\n\n### Detach From The Current Screen Session\n**ctrl-a d**\n\nIn order to detach from a screen session hold the control key and press “a”. Then press the “d” key.\n\nYou’ll be back a command prompt like the below after doing so.\n```\n[detached from 28882.db-dump]\n$\n```\n### List Running Screen Sessions\n```\n$ screen -ls\n```\nAs mentioned above `screen -ls` will list running screen sessions. Here’s a sample of the output\n```\n$ screen -ls\nThere are screens on:\n\t28882.db-dump\t(Detached)\n\t46174.mw-scan\t(Detached)\n2 Sockets in \/var\/run\/screen\/S-mchadwick.\n```\n### Re-attach to a Screen Session\n```\nscreen -r [name-or-pid]\n```\n`screen -r` will allow you to re-attach to a running screen session. You can use the id or name of the screen session.\n\n### Scroll up while attached to a screen session\n**ctrl-a esc**\n\nWhile attached to a screen session, hold the control key and press “a”. Then press escape. At this point you’ll be able to scroll up and down within the screen session.\n\nPress escape again to regain the ability to enter commands.\n\n### Kill the screen session you’re currently attached to\n**ctrl-a k**\n\nWhile attached to a screen session, hold the control key and press “a”, then press “k”. You’ll need to then press “y” to confirm you’d really like to kill the screen session.\n\n### Detach a screen from another terminal and attach to it\n```\n$ screen -d -r [name]\n```\nYou may have to do this if you unexpectedly lost an SSH connection while attached to a screen session. In this case the `screen` session may still think it’s connected to that SSH connection (e.g. orphaned). The above command will detach it from that terminal and re-attach it to the current terminal.\n\n![Max Chadwick](https:\/\/maxchadwick.xyz\/img\/me.jpg) **Hi, I'm Max\\!**\n\nI'm a software developer who mainly works in [PHP](https:\/\/maxchadwick.xyz\/tags\/#php), but loves dabbling in other languages like [Go](https:\/\/maxchadwick.xyz\/tags\/#go) and [Ruby](https:\/\/maxchadwick.xyz\/tags\/#ruby). Technical topics that interest me are [monitoring](https:\/\/maxchadwick.xyz\/tags\/#monitoring), [security](https:\/\/maxchadwick.xyz\/tags\/#security) and [performance](https:\/\/maxchadwick.xyz\/tags\/#performance). I'm also a stickler for good documentation and clear technical writing.\n\nDuring the day I lead a team of developers and solve challenging technical problems at [Rightpoint](https:\/\/www.rightpoint.com\/) where I mainly work with the [Magento](https:\/\/maxchadwick.xyz\/tags\/#magento) platform. I've also [spoken](https:\/\/maxchadwick.xyz\/talks) at a number of events.\n\nIn my spare time I [blog about tech](https:\/\/maxchadwick.xyz\/blog), [work on open source](https:\/\/github.com\/mpchadwick) and [participate in bug bounty programs](https:\/\/bugcrowd.com\/mpchadwick).\n\nIf you'd like to get in contact, you can find me on [Twitter](https:\/\/twitter.com\/maxpchadwick) and [LinkedIn](https:\/\/www.linkedin.com\/in\/mpchadwick\/).\n\nLoad comments\n\nPlease enable JavaScript to view the [comments powered by Disqus.](https:\/\/disqus.com\/?ref_noscript)\n\nThe entire source of this site is [available on Github](https:\/\/github.com\/mpchadwick\/mpchadwick.github.io).\n\nIf there's a specific topic you're looking to read about try [searching](https:\/\/maxchadwick.xyz\/search) or [browsing by tag](https:\/\/maxchadwick.xyz\/tags\/).\n\n- [GitHub](https:\/\/github.com\/mpchadwick)\n- [Twitter](https:\/\/twitter.com\/maxpchadwick)\n- [LinkedIn](https:\/\/www.linkedin.com\/in\/mpchadwick)\n- [RSS](https:\/\/maxchadwick.xyz\/feed.xml)\n\n**© 2025 Max Chadwick**","attrs_readable_markdown":null,"meta_canonical":null}

3. Robots.txt Check

Query:

Response:

4. Spam/Ban Check

Query:

Response:

5. Seen Status Check

ℹ️ Skipped - page is already crawled

📄

INDEXABLE

✅

CRAWLED

2 months ago

🤖

ROBOTS ALLOWED

Page Info Filters

Filter	Status	Condition	Details
HTTP status	PASS	`download_http_code = 200`	HTTP 200
Age cutoff	PASS	`download_stamp > now() - 6 MONTH`	2.7 months ago
History drop	PASS	`isNull(history_drop_reason)`	No drop reason
Spam/ban	PASS	`fh_dont_index != 1 AND ml_spam_score = 0`	ml_spam_score=0
Canonical	PASS	`meta_canonical IS NULL OR = '' OR = src_unparsed`	Not set

Page Details

Property	Value
URL	https://maxchadwick.xyz/blog/linux-screen-cheatsheet
Last Crawled	2026-01-14 22:42:51 (2 months ago)
First Indexed	2018-04-28 23:57:27 (7 years ago)
HTTP Status Code	200
Meta Title	Linux Screen Cheatsheet \| Max Chadwick
Meta Description	A quick reference of useful commands for interacting with the Linux screen utility,
Meta Canonical	null
Boilerpipe Text	Published: April 25, 2018 There are a few of these, but none have all the answers that I want (e.g. how to scroll back up the terminal while attached to a screen session) or are in a format I like. So, I’ve prepared my own. This is a cheatsheet of how to do the things I typically need to do with Linux (unix)’s screen command… Start A New Screen Session $ screen -S [name] Name is just an alias for the screen session so that it can easily be distinguished what’s happening in that session when looking at a list of all screen sessions via screen -ls . Detach From The Current Screen Session ctrl-a d In order to detach from a screen session hold the control key and press “a”. Then press the “d” key. You’ll be back a command prompt like the below after doing so. [detached from 28882.db-dump] $ List Running Screen Sessions $ screen -ls As mentioned above screen -ls will list running screen sessions. Here’s a sample of the output $ screen -ls There are screens on: 28882.db-dump (Detached) 46174.mw-scan (Detached) 2 Sockets in /var/run/screen/S-mchadwick. Re-attach to a Screen Session screen -r [name-or-pid] screen -r will allow you to re-attach to a running screen session. You can use the id or name of the screen session. Scroll up while attached to a screen session ctrl-a esc While attached to a screen session, hold the control key and press “a”. Then press escape. At this point you’ll be able to scroll up and down within the screen session. Press escape again to regain the ability to enter commands. Kill the screen session you’re currently attached to ctrl-a k While attached to a screen session, hold the control key and press “a”, then press “k”. You’ll need to then press “y” to confirm you’d really like to kill the screen session. Detach a screen from another terminal and attach to it $ screen -d -r [name] You may have to do this if you unexpectedly lost an SSH connection while attached to a screen session. In this case the screen session may still think it’s connected to that SSH connection (e.g. orphaned). The above command will detach it from that terminal and re-attach it to the current terminal.
Markdown	- [Home](https://maxchadwick.xyz/) - [Blog](https://maxchadwick.xyz/blog/) - [Talks](https://maxchadwick.xyz/talks) - [Projects](https://maxchadwick.xyz/projects) # Linux Screen Cheatsheet #### Published: April 25, 2018 Tags: - [Shell](https://maxchadwick.xyz/tags/#shell) - [Tools](https://maxchadwick.xyz/tags/#tools) ![:pencil2:](https://github.githubassets.com/images/icons/emoji/unicode/270f.png) [Improve this page on GitHub](https://github.com/mpchadwick/mpchadwick.github.io/edit/master/_posts/2018-04-25-linux-screen-cheatsheet.md) There are a few of these, but none have all the answers that I want (e.g. how to scroll back up the terminal while attached to a screen session) or are in a format I like. So, I’ve prepared my own. This is a cheatsheet of how to do the things I typically need to do with Linux (unix)’s `screen` command… ### Start A New Screen Session ``` $ screen -S [name] ``` Name is just an alias for the screen session so that it can easily be distinguished what’s happening in that session when looking at a list of all screen sessions via `screen -ls`. ### Detach From The Current Screen Session ctrl-a d In order to detach from a screen session hold the control key and press “a”. Then press the “d” key. You’ll be back a command prompt like the below after doing so. ``` [detached from 28882.db-dump] $ ``` ### List Running Screen Sessions ``` $ screen -ls ``` As mentioned above `screen -ls` will list running screen sessions. Here’s a sample of the output ``` $ screen -ls There are screens on: 28882.db-dump (Detached) 46174.mw-scan (Detached) 2 Sockets in /var/run/screen/S-mchadwick. ``` ### Re-attach to a Screen Session ``` screen -r [name-or-pid] ``` `screen -r` will allow you to re-attach to a running screen session. You can use the id or name of the screen session. ### Scroll up while attached to a screen session ctrl-a esc While attached to a screen session, hold the control key and press “a”. Then press escape. At this point you’ll be able to scroll up and down within the screen session. Press escape again to regain the ability to enter commands. ### Kill the screen session you’re currently attached to ctrl-a k While attached to a screen session, hold the control key and press “a”, then press “k”. You’ll need to then press “y” to confirm you’d really like to kill the screen session. ### Detach a screen from another terminal and attach to it ``` $ screen -d -r [name] ``` You may have to do this if you unexpectedly lost an SSH connection while attached to a screen session. In this case the `screen` session may still think it’s connected to that SSH connection (e.g. orphaned). The above command will detach it from that terminal and re-attach it to the current terminal. ![Max Chadwick](https://maxchadwick.xyz/img/me.jpg) Hi, I'm Max\! I'm a software developer who mainly works in [PHP](https://maxchadwick.xyz/tags/#php), but loves dabbling in other languages like [Go](https://maxchadwick.xyz/tags/#go) and [Ruby](https://maxchadwick.xyz/tags/#ruby). Technical topics that interest me are [monitoring](https://maxchadwick.xyz/tags/#monitoring), [security](https://maxchadwick.xyz/tags/#security) and [performance](https://maxchadwick.xyz/tags/#performance). I'm also a stickler for good documentation and clear technical writing. During the day I lead a team of developers and solve challenging technical problems at [Rightpoint](https://www.rightpoint.com/) where I mainly work with the [Magento](https://maxchadwick.xyz/tags/#magento) platform. I've also [spoken](https://maxchadwick.xyz/talks) at a number of events. In my spare time I [blog about tech](https://maxchadwick.xyz/blog), [work on open source](https://github.com/mpchadwick) and [participate in bug bounty programs](https://bugcrowd.com/mpchadwick). If you'd like to get in contact, you can find me on [Twitter](https://twitter.com/maxpchadwick) and [LinkedIn](https://www.linkedin.com/in/mpchadwick/). Load comments Please enable JavaScript to view the [comments powered by Disqus.](https://disqus.com/?ref_noscript) The entire source of this site is [available on Github](https://github.com/mpchadwick/mpchadwick.github.io). If there's a specific topic you're looking to read about try [searching](https://maxchadwick.xyz/search) or [browsing by tag](https://maxchadwick.xyz/tags/). - [GitHub](https://github.com/mpchadwick) - [Twitter](https://twitter.com/maxpchadwick) - [LinkedIn](https://www.linkedin.com/in/mpchadwick) - [RSS](https://maxchadwick.xyz/feed.xml) © 2025 Max Chadwick
Readable Markdown	null
Shard	181 (laksa)
Root Hash	3060307996292955781
Unparsed URL	xyz,maxchadwick!/blog/linux-screen-cheatsheet s443