Cheatsheet: Docker

Cheatsheet: vi/vim

I just started to learn how to boost my productivity skill making some tasks faster and faster not by quality reduction, but by routine reduction.

It’s thought that I don’t know any text editor as a usual developer should know. I’ve got a choice between emacs, Sublime Text and vim. I can’t describe why, but I tried vim. May be because of enhanced command choice and full keyboard use.

Cheatsheet: AWS CLI

At the middle of 2010`s cloud infrastructure became necessity for software infrastructure. There is a huge trend to move a hardware maintenance from local datacenters to the cloud.

Cheatsheet: Linux system variables

Many people think that the problem of application performance, security and networking lies in supported services. Like Nginx is proxying too slow or remote DBMS cannot see my network. Frequently the problem in OS. Default values of system settings can restrict our environment to make the service jobs quick and simple. The best way to change your system configuration – change the system variables.

Cheatsheet: database shell commands

In first steps young DBA can greedily soak up all kinds of database knowledges: as RDBMS as NoSQL. We’re realising things like how table index works, how to optimize memory caching, write triggers and procedurs etc.. But we still can forget a simple command to create user or show tables list. Also we can get stuck when switching from MySQL to PostgreSQL or whatever else, cause command syntax is different.

Cheatsheet: .bashrc

File ~/.bashrc is a simple configuration of Linux user where user can describe all shell instructions necessary for each session. It’s a frequent practice to leave useful command at this file, but aliases and functions looks much more suitable for this configuration file.

Cheatsheet: iptables

iptables is Linux firewall standard. You can easily open and close network connections through it. Actually it’s pretty easy, but sometimes we can’t remember any flags and commands to create firewall rules. Here is a cheatsheet table constituted by all necessary iptables rules for novices. I’ll try to update it once in a while.