scottjacobsen

SSH agent forwarding is great. It allows you to ssh from one server to
another all the while using the ssh-agent running on your local
workstation. The benefit is you don't need to generate ssh key pairs
on the servers you are connecting to in order to hop around.

When you ssh to a remote machine the remote machine talks to your
local ssh-agent through the socket referenced by the SSH_AUTH_SOCK
environment variable.

So you the remote server you can do something like: 

buhman

localhost ~ # cat <<EOF> /etc/wpa_supplicant.conf
ctrl_interface=DIR=/run/wpa_supplicant GROUP=wheel
update_config=1
EOF
localhost ~ # wpa_supplicant -iwlp1s0 -Dnl80211 -c/etc/wpa_supplicant.conf -B
Successfully initialized wpa_supplicant
localhost ~ # wpa_cli
wpa_cli v2.0
Copyright (c) 2004-2012, Jouni Malinen <j@w1.fi> and contributors

aaronhurt

/**
 * example C code using libcurl and json-c
 * to post and return a payload using
 * http://jsonplaceholder.typicode.com
 *
 * License:
 *
 * This code is licensed under MIT license
 * https://opensource.org/licenses/MIT
 *

fabiosantoscode

# This enables a publicly available server to forward connections to your computer behind a NAT.
# So if you access http://xx.xx.xx.xx:8080/ on your browser, traffic is redirected to your machine behind a NAT.

# on your local host, type:
ssh -R xx.xx.xx.xx:8888:localhost:80 root@xx.xx.xx.xx

# now wait for your shell, and type:
socat TCP-LISTEN:8080,FORK TCP:127.0.0.1:8888

# This command outputs nothing, just keep it running. While you don't ^C, your tunnel is up and running!

kwilczynski

If you want to check whether a node run_list includes a specific role (upon expansion), then you could use role? method on the Node object:

node.role?('name')

Alternatively, you can see whether either would work for you:

node.roles.include?('name')

node.run_list?('role[name]')

Kovrinic

# one or the other, NOT both

[url "https://github"]
  insteadOf = git://github

# or

[url "git@github.com:"]
  insteadOf = git://github

asukakenji

Go (Golang) GOOS and GOARCH

All of the following information is based on go version go1.17.1 darwin/amd64.

GOOS Values

GOOS	Out of the Box
aix	✅
android	✅

hjertnes

SPC
    SPC: find file
    , switch buffer
    . browse files
    : MX
    ; EX
    < switch buffer
    ` eval
    u universal arg
    x pop up scratch

nat-418

Why Tcl?

Introduction

I use [Tcl] as my scripting language of choice, and recently someone asked me why. This article is an attempt to answer that question.

Ousterhout's dichotomy claims that there are two general categories of programming languages: