My tips and dot files

Docker

Increase docker container shell columns link

docker exec -e COLUMNS="`tput cols`" -e LINES="`tput lines`" -ti container bash

Remove all stoped containers:

docker container prune

Open the docker daemon to the network

/etc/default/docker

DOCKER_OPTS="--dns 1.1.1.1 --dns 8.8.4.4 -H 0.0.0.0:2375 -H unix:///var/run/docker.sock"

/lib/systemd/system/docker.service

EnvironmentFile=/etc/default/docker
ExecStart=/usr/bin/dockerd $DOCKER_OPTS

sudo systemctl daemon-reload && sudo systemctl restart docker.service

Build from git repository

# https://docs.docker.com/engine/reference/commandline/build/#git-repositories
#                                                                                 #branch(default: master):directory of Dockerfile
docker build -t apachepulsar/pulsar-dashboard https://github.com/apache/pulsar.git#master:dashboard

Tool to explore docker images

https://github.com/wagoodman/dive

Solve the pip bug on Ubuntu 18.04

After running pip3 install -U pip the pip breaks with the following error:

Traceback (most recent call last):
  File "/usr/bin/pip3", line 9, in <module>
    from pip import main
ImportError: cannot import name 'main'

To solve this problem execute:

RUN bash -c "hash -d pip3"

You can found more details about the problem and the solution here.

Linux

When the system is very slow or not responding use the following key combinations:

# Wait 1 second between each letter key press
# Maintain the CTRL + ALT + SysRQ pressed
CTRL + ALT + SysRQ r e i s u b

Find all hosts online on network:

sudo arp-scan --interface=eth0 --localnet

Monitoring files and running command. In this example I will run the python unittest.

while inotifywait -e close_write -r .; do python -m unittest discover; done

Shell

install zgen

git clone https://github.com/tarjoilija/zgen.git "${HOME}/.zgen"
# edit .zshrc to load zgen
source "${HOME}/.zgen/zgen.zsh"

spaceship prompt

emoji

Arch

sudo pacman -Sy noto-fonts-emoji

Ubuntu

https://launchpad.net/~ubuntu-desktop/+archive/ubuntu/transitions/+files/fonts-noto-color-emoji_0~20170913-0ubuntu1~bionic1_all.deb?_ga=2.144106620.812436444.1537798894-1076452805.1537798894

Git

Remove remote tag

git push --delete origin tagname

Remove local tag

git tag --delete tagname

Create commit message template

git config --global commit.template ~/.gitmessage

echo > ~/.gitmessage << EOF
# [Add/Fix/Remove/Update/Refactor/Document] [summary]


# Why is it necessary? (Bug fix, feature, improvements?)
-
# How does the change address the issue? 
-
# What side effects does this change have?
-
# Include a link to the ticket, if any.
EOF

Partial stage new file

git add -N <file>
git add -p <file>

Arch

Remove a package and all dependencies.

pacman -Runs gnome

Tools

• gitmoji
• pbpst
• jq playground
• regex101

KDE 5

• shortcuts

Gnome 3

Disable keyboard layout switch with ALT+Shift

dconf write /org/gnome/desktop/input-sources/xkb-options "['grp_led:scroll']"

asdf install python and erlang

Dependencies(Ubuntu)

sudo apt-get install build-essential libbz2-dev libsqlite3-dev libreadline-dev \
libssl-dev libffi-dev libc6-dev zlib1g-dev automake autoconf libncurses5-dev \
unixodbc-dev libwxgtk3.0-dev libxslt1-dev xsltproc fop libxml2-utils

httpie

cheatsheet

Minikube

How to manage using systemctl

systemctl status snap.docker.dockerd.service

Load test tools

• hey
• siege

Network

Redirect local service calling

• socat TCP4-LISTEN:80,fork TCP4:www.yourdomain.org:8080

Backup with rsync

Local sync

rsync -avzh /my/origin/dir /my/dest/dir

Remote sync

rsync -avzhe ssh --progress /my/origin/dir <USER>@<HOST>:/my/dest/dir