CodeSandBox-and-ptero-setup

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# Use via CDN

jsDelivr

jsDelivr serves any public GitHub repository as a CDN with zero setup. Pick a version and a file to get a ready-to-paste link and snippet.

Link
Example

Command Glossary

Commands referenced in this DOCs, explained below.

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crontab

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Schedule cron jobs to run on a time interval for the current user.

crontab -e

[e]dit the crontab file for the current user:

sudo crontab -e -u {{user}}

[e]dit the crontab file for a specific [u]ser:

crontab {{path/to/file}}

Replace the current crontab with the contents of the given file:

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nano

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Text editor. An enhanced `pico` clone.
See also: `pico`, `rnano`.

nano {{path/to/file1 path/to/file2 ...}}

Open specific files, moving to the next file after closing the previous one:

nano {{[-I|--ignorercfiles]}}

Start the editor without using configuration files:

nano +{{line}},{{column}} {{path/to/file}}

Open a file and position the cursor at a specific line and column:

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openssl req

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Manage PKCS#10 Certificate Signing Requests.

openssl req -new -sha256 -key {{filename.key}} -out {{filename.csr}}

Generate a certificate signing request to be sent to a certificate authority:

openssl req -new -x509 -newkey {{rsa}}:{{4096}} -keyout {{filename.key}} -out {{filename.cert}} -subj "{{/C=XX/CN=foobar}}" -days {{365}}

Generate a self-signed certificate and a corresponding key-pair, storing both in a file:

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journalctl

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Query the systemd journal.
See also: `dmesg`.

journalctl {{[-n|--lines]}} {{n}} {{[-f|--follow]}}

Show the latest `n` lines and follow new messages (like `tail --follow` for traditional syslog):

journalctl {{[-b|--boot]}} -1 {{[-p|--priority]}} 3

Show all messages with priority level 3 (errors) from the boot before last shutdown:

journalctl {{[-u|--unit]}} {{unit}}

Show all messages by a specific unit:

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systemctl enable

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Enable systemd services.
See also: `systemctl revert`.

systemctl enable {{unit}}

Enable a service to run on boot:

systemctl enable {{unit}} --now

Enable a service to run on boot and start it now:

systemctl enable {{unit}} --user

Enable a user unit to run on login:

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systemctl restart

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Stop and then start one or more systemd units.
Can be used in place of `systemctl start` on a stopped unit, but `start` is safer so that a running unit isn't accidentally restarted.

systemctl restart {{unit}}

Restart a unit:

systemctl restart {{unit1 unit2 ...}}

Restart more than one unit:

systemctl restart {{unit}} --user

Restart a user unit:

// repository documentation