SQRD

Command Line Interface

Standards

Templating

envsubst using environment variable to fill-in file templates.

Alternatives

Some commands alternative, many found on modern-unix

For HTTP queries from the command line

xh

curlie a mashup between HTTPie and curl

For quick command reference, alternative to man

tldr

[cheat](go get -u github.com/cheat/cheat/cmd/cheat)

For monitoring

bottom no lazy install yet

glances in python with a web interface

gtop graphical top

With GUI

vigil

monitoror

For DNS

dog

Tunelling

frp is probably the best open source alternative to ngrok. See the whole list of alternatives.