A collection of links to useful cheat sheets.
Only what's properly printable can get in. It should also be small enough to fit on a few pages.
Pleae contribute any you remember you've seen and liked. It would be wonderful if we can get these to be something more commonly made.
https://www.alienvault.com/blog-content/GoogleHackingCheatSheet.pdf (nicely put together!)
http://bhami.com/unix-rosetta.pdf (printable on big printers)
http://www.tablespace.net/quicksheet/aix-quicksheet.pdf
http://www.cheat-sheets.org/saved-copy/linux_quickref.pdf https://www.loggly.com/wp-content/uploads/2015/05/Linux-Cheat-Sheet-Sponsored-By-Loggly.pdf (Linux and its GNUisms)
http://www.oracle.com/technetwork/solaris-11-cheat-sheet-1556378.pdf (printable, great)
https://www.sans.org/security-resources/sec560/windows_command_line_sheet_v1.pdf (printable, old)
http://www.roesen.org/files/cp_cli_ref_card.pdf
https://forums.juniper.net/jnet/attachments/jnet/ConfigLib/147/1/Juniper-SRX-CheatSheet.pdf (printable, old) http://netfixpro.com/wp-content/uploads/2016/09/Juniper-Commands-Cheat-Sheet-1.pdf (printable, looks good)
https://mystajones.files.wordpress.com/2016/06/cisco-ios-quick-reference-cheat-sheet-2-1.pdf (printable)
https://havel.mojeservery.cz/wp-content/uploads/2015/10/routeros-cheat-sheet-v1.1.pdf (printable)
http://eval.veritas.com/downloads/van/vm_quickref.pdf (printable)
http://hamwaves.com/zfs/en/zfs.a4.pdf (good manual, but not 2 pages)
https://en.opensuse.org/images/1/17/Zypper-cheat-sheet-1.pdf (printable, front) https://en.opensuse.org/images/3/30/Zypper-cheat-sheet-2.pdf (printable, back)
http://www.arduino.org/learning/getting-started/download/21_924abaed4958b5b40713907d1099b82c (printable)
http://www.postgresonline.com/downloads/special_feature/postgresql90_cheatsheet_A4.pdf
http://www.dusun-think.net/dosya/czyayin/mysqlcheatsheet.pdf https://havel.mojeservery.cz/wp-content/uploads/2015/10/mysql-ref-card.pdf (better looks)
https://www.docker.com/sites/default/files/Docker_CheatSheet_08.09.2016_0.pdf (printable)
https://sematext.com/wp-content/uploads/2017/04/kubernetes-cheatsheet.pdf (printable)
https://www.cheatography.com/davbfr/cheat-sheets/vagrant-cheat-sheet/
WHY is there none for VBoxManage?
http://public.diversetips.se/XenServer%206.0%20XE-Command%20Reference%20(1.1).pdf (WOW!) http://360is.blogspot.de/2009/03/xenserver-administration-poster.html (~2009, asking for email, good intro anyway)
https://www.adldata.org/wp-content/uploads/2015/07/VMware-vSphere-Performance-Resolution-Cheat-Sheet.pdf (performance debugging) http://www.4d-dc.com/sites/default/files/4D_CHEAT_SHEET%20VM_WARE%201%206.pdf (only Ports and Logs)
https://vmware.github.io/photon-controller/assets/files/command-line-cheat-sheet.pdf
https://azeria-labs.com/assembly-basics-cheatsheet/
http://blog.nanard.org/post/2013/05/23/CFEngine-3-%3A%3A-PCRE-cheatsheet (PCRE Cheatsheet)
..
..
(I remember one for knife)
..
http://www.cheat-sheets.org/saved-copy/2675288-Veritas-Cluster-Cheat-Sheet.pdf (printable) http://eval.veritas.com/downloads/van/vcs_quickref.pdf (printable, better)
https://services.github.com/on-demand/downloads/github-git-cheat-sheet.pdf (printable) https://www.atlassian.com/dms/wac/images/landing/git/atlassian_git_cheatsheet.pdf (printable, better)
https://www.mercurial-scm.org/wiki/QuickReferenceCardsAndCheatSheets?action=AttachFile&do=view&target=Mercurial-Cheatsheet-Adrian-v1.0.pdf (once you know it, this is beneficial) http://www.cheatography.com/codeshane/cheat-sheets/mercurial-hg/pdf/ (printable)
http://orgmode.org/orgcard.pdf (printable, org mode only?)
https://www.ibm.com/developerworks/community/files/form/anonymous/api/library/0e088c99-9f24-4c5c-a79a-a65ab8323565/document/ea62f503-ceaa-403f-8142-26a946e0723a/media (printable, good explanations I've not seen before)
http://www.glump.net/files/2012/08/vi-vim-cheat-sheet-and-tutorial.pdf (printable, information density: flight sim users)
https://learncodethehardway.org/unix/bash_cheat_sheet.pdf http://www.asfa.k12.al.us/ourpages/auto/2016/8/10/55689107/reference_bash-cheat.pdf (not too specific) https://www.cheatography.com/citguy/cheat-sheets/bash-shortcuts/ (emacs mode movement only) http://www.catonmat.net/download/bash-vi-editing-mode-cheat-sheet.pdf (vi mode movement only, highly recommended if you want to actually USE your shell)
http://st23.org/misc/sysadmin/downloads/reference.card-ksh.programming.pdf (printable, 1994)
https://download.microsoft.com/download/2/1/2/2122F0B9-0EE6-4E6D-BFD6-F9DCD27C07F9/WS12_QuickRef_Download_Files/PowerShell_ISE_v3.pdf https://static1.squarespace.com/static/552092d5e4b0661088167e5c/t/5760096ecf80a129e0b17634/1465911664070/Windows+PowerShell+Logging+Cheat+Sheet+ver+June+2016+v2.pdf (about logging)
Win: https://code.visualstudio.com/shortcuts/keyboard-shortcuts-windows.pdf Mac: https://code.visualstudio.com/shortcuts/keyboard-shortcuts-macos.pdf Linux: https://code.visualstudio.com/shortcuts/keyboard-shortcuts-linux.pdf
http://packetlife.net/media/library/16/Markdown.pdf (printable) https://www.rstudio.com/wp-content/uploads/2015/02/rmarkdown-cheatsheet.pdf (printable, for R users)
http://www.digilife.be/quickreferences/QRC/Doxygen%20Quick%20Reference.pdf (printable, ftw)
http://pentestmonkey.net/cheat-sheet/shells/reverse-shell-cheat-sheet (not pdf, but useable)
... nothing yet
... didnt find anything good
(For the record, anything that is not purely PDF should be down here)
https://www.cyberciti.biz/howto/question/linux/apt-get-cheat-sheet.php
https://devhints.io/bash.html (really nice)
http://www.cyberfella.co.uk/2012/08/28/emc-networker/
http://lzone.de/cheat-sheet/OpenNebula
https://sabaini.at/pages/ceph-cheatsheet.html
http://www.datadisk.co.uk/html_docs/sun/sun_zfs_cs.htm
https://workaround.org/bacula-cheatsheet/
https://www.cambus.net/freebsd-cheatsheet/ https://gist.github.com/steakknife/77619edfa67c501c8aa0
http://linux-iscsi.org/wiki/ISCSI#Cheat_sheet
https://github.com/bertvv/cheat-sheets/blob/master/print/VyOS.pdf
http://blogofsysadmins.com/xenserver-commands-cheat-sheet (text, not pdf :)
http://richgoldstein.net/KB/esx_cheatsheet.html https://ervikrant06.wordpress.com/2014/07/16/esx-5-5-cheat-sheet-part-1/
http://www.pica8.com/document/v2.3/pdf/ovs-commands-reference.pdf (pica8 is only good docs, pdf, but not a cheat sheet)
https://github.com/neilhwatson/nustuff/blob/master/perl/cheatsheet.pod