Useful howtos - Revision history

Datanasov: Convert index to card grid via Template:Card; add descriptions and commands

2026-08-08T05:22:02Z

Convert index to card grid via Template:Card; add descriptions and commands

← Older revision		Revision as of 05:22, 8 August 2026
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	~~<div style = "line-height: 1.2">~~		__NOTOC__
	~~{{clear}}</div></div><div style = "margin-top: 1~~.~~5em; border: 3px solid #ae8c55; border-radius: .5em; padding: 1em 1.5em; font-size: 1.2em">~~		Short, tested procedures for the things that come up once a year and are never
	~~<strong></strong>~~		where you left them.
	~~==NGINX==~~
	~~===Configs===~~
	~~[[NGINX underscores in headers]]~~

	==~~Cli~~ commands==		== NGINX ==
	[[Clean Linux DNS cache]]		<div class="lz-cardgrid">
	[[Clean MAC DNS cache]]		{{Card\|page=NGINX underscores in headers\|desc=Headers containing underscores are dropped by default. Turn them back on.\|cmd=underscores_in_headers on;}}
	[[Clean Windows DNS cache]]		{{Card\|page=Self-Signed CA\|desc=Issue a wildcard cert with mkcert and get every box on the LAN to trust it.\|cmd=mkcert -install}}
	~~[[Self-Signed CA]]~~		</div>
	==~~LINUX~~==
	==~~=Enable~~ Linux in Windows OS===		== CLI commands ==
	[[Linux subsystem in Windows ~~OS]]~~		<div class="lz-cardgrid">
	~~===Ansible~~===		{{Card\|page=Clean Linux DNS cache\|desc=systemd-resolved, nscd and dnsmasq.\|cmd=resolvectl flush-caches}}
	[[Downgrading Ansible Engine on CentOS 7]]		{{Card\|page=Clean MAC DNS cache\|title=Clean macOS DNS cache\|desc=Flush the resolver and restart mDNSResponder.\|cmd=dscacheutil -flushcache}}
	===~~Mail Subsystem~~===		{{Card\|page=Clean Windows DNS cache\|desc=From an elevated prompt.\|cmd=ipconfig /flushdns}}
	~~[[Spamassasin Manual Learning]]~~		</div>
	===~~sudo~~===
	~~[[Sudo nopasswd]]~~		== Linux ==
	===~~Perl Warnings~~===		<div class="lz-cardgrid">
	~~[[Perl Warnings]]~~		{{Card\|page=Linux subsystem in Windows OS\|title=Linux subsystem in Windows\|desc=Enabling and installing WSL.\|cmd=wsl --install}}
			{{Card\|page=Downgrading Ansible Engine on CentOS 7\|desc=Pinning a working release when the latest breaks your playbooks.\|cmd=yum downgrade ansible}}
			{{Card\|page=Spamassasin Manual Learning\|title=SpamAssassin manual learning\|desc=Feeding ham and spam to the Bayes classifier by hand.\|cmd=sa-learn --spam}}
			{{Card\|page=Sudo nopasswd\|desc=Dropping the password prompt for a user or a group.\|cmd=NOPASSWD: ALL}}
			{{Card\|page=Perl Warnings\|title=Perl warnings\|desc=Silencing locale warnings on a fresh install.}}
			</div>

			== Networking ==
			<div class="lz-cardgrid">
			{{Card\|page=SYS-4-CONFIG_RESOLVE_FAILURE\|desc=What the Cisco log message means and how to stop it.\|cmd=no ip domain-lookup}}
			</div>

	~~==Networking==~~
	~~===cisco===~~
	~~[[SYS-4-CONFIG_RESOLVE_FAILURE]]~~
	[[Category:Howto]]		[[Category:Howto]]
	~~[[Category:NGINX]]~~
	~~[[Category:Linux]]~~
	~~[[Category:Mac OS]]~~
	~~[[Category:Networking]]~~

Datanasov at 10:24, 14 May 2026

2026-05-14T10:24:55Z

← Older revision		Revision as of 10:24, 14 May 2026
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	[[Clean MAC DNS cache]]		[[Clean MAC DNS cache]]
	[[Clean Windows DNS cache]]		[[Clean Windows DNS cache]]
			[[Self-Signed CA]]
	==LINUX==		==LINUX==
	===Enable Linux in Windows OS===		===Enable Linux in Windows OS===

Datanasov: /* LINUX */

2025-07-08T07:31:50Z

LINUX

← Older revision		Revision as of 07:31, 8 July 2025
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	===sudo===		===sudo===
	[[Sudo nopasswd]]		[[Sudo nopasswd]]
			===Perl Warnings===
			[[Perl Warnings]]

	==Networking==		==Networking==
	===cisco===		===cisco===

Datanasov: /* Cli commands */

2025-07-08T07:31:03Z

Cli commands

← Older revision		Revision as of 07:31, 8 July 2025
Line 10:		Line 10:
	[[Clean MAC DNS cache]]		[[Clean MAC DNS cache]]
	[[Clean Windows DNS cache]]		[[Clean Windows DNS cache]]
	~~[[Perl Warnings]]~~

	==LINUX==		==LINUX==

Datanasov: /* Cli commands */

2025-07-08T07:30:33Z

Cli commands

← Older revision		Revision as of 07:30, 8 July 2025
Line 10:		Line 10:
	[[Clean MAC DNS cache]]		[[Clean MAC DNS cache]]
	[[Clean Windows DNS cache]]		[[Clean Windows DNS cache]]
			[[Perl Warnings]]

	==LINUX==		==LINUX==
	===Enable Linux in Windows OS===		===Enable Linux in Windows OS===

Datanasov at 09:46, 23 April 2025

2025-04-23T09:46:38Z

← Older revision		Revision as of 09:46, 23 April 2025
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	===sudo===		===sudo===
	[[Sudo nopasswd]]		[[Sudo nopasswd]]
			==Networking==
	===cisco===		===cisco===
	[[SYS-4-CONFIG_RESOLVE_FAILURE]]		[[SYS-4-CONFIG_RESOLVE_FAILURE]]

Datanasov at 09:41, 23 April 2025

2025-04-23T09:41:09Z

← Older revision		Revision as of 09:41, 23 April 2025
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	==Cli commands==		==Cli commands==
			[[Clean Linux DNS cache]]
	[[Clean MAC DNS cache]]		[[Clean MAC DNS cache]]
	[[Clean Windows DNS cache]]		[[Clean Windows DNS cache]]

Datanasov at 19:26, 20 June 2024

2024-06-20T19:26:44Z

← Older revision		Revision as of 19:26, 20 June 2024
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	===Configs===		===Configs===
	[[NGINX underscores in headers]]		[[NGINX underscores in headers]]
	~~==MAC OS==~~
	===Cli commands===		==Cli commands==
	[[Clean MAC DNS cache]]		[[Clean MAC DNS cache]]
			[[Clean Windows DNS cache]]
	==LINUX==		==LINUX==
	===Enable Linux in Windows OS===		===Enable Linux in Windows OS===

Datanasov at 22:12, 7 June 2024

2024-06-07T22:12:26Z

← Older revision		Revision as of 22:12, 7 June 2024
Line 17:		Line 17:
	===sudo===		===sudo===
	[[Sudo nopasswd]]		[[Sudo nopasswd]]
			===cisco===
			[[SYS-4-CONFIG_RESOLVE_FAILURE]]
	[[Category:Howto]]		[[Category:Howto]]
	[[Category:NGINX]]		[[Category:NGINX]]
	[[Category:Linux]]		[[Category:Linux]]
	[[Category:Mac OS]]		[[Category:Mac OS]]
			[[Category:Networking]]

Datanasov at 20:12, 6 March 2024

2024-03-06T20:12:50Z

← Older revision		Revision as of 20:12, 6 March 2024
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			<div style = "line-height: 1.2">
			{{clear}}</div></div><div style = "margin-top: 1.5em; border: 3px solid #ae8c55; border-radius: .5em; padding: 1em 1.5em; font-size: 1.2em">
			<strong></strong>
	==NGINX==		==NGINX==
	===Configs===		===Configs===