Using vi is like being in a relationship, you are involved. Using Emacs is like a marriage, you are committed, in large part because there is so much to learn. This is one of the reasons I don’t recommend it for everyone. – devopsanywhere
Lets first answer the question: who is DevOps ? What kind of activities he or she is performing ? Answering this question is necessary precondition to get into workflow implementation details.
- Typical sysadmin activities: logging onto remote servers, managing files and directories, editing configurations, restarting services, watching logs and so on.
- Software development activities: all DevOps work somehow connected to writing various scripts on different languages and formats: Bash, Python, Go, Ansible, Salt, Puppet, JSON, YAML, etc. Those all are stored in projects in DVCS systems like git or Mercurial.
- Management activities - because DevOps work is more about managing your organisation via code - it usually requires developing documentation on current processes, documenting improvements, architectures and new procedures.
Lets see how all of the above can be implemented using Emacs.
Step by step Emacs introduction to DevOps activities
Shell scripting is a large part of any sysadmin or DevOps activities. Emacs supports various shells syntax by default, you don’t need to install any additional modules.
Emacs provides the following for shell scripting:
- Support for shell scripting syntax and templates (check the top menu “Sh-Script” for all operations)
- Ability to execute script within the emacs
A short video with shell scripting introduction:
Various scripts and languages support
Emacs has hundreds of available modules for different languages. You can install those by running
In the following video it is explained how various Emacs modes can help doing DevOps jobs.
General work with files
Working with any lists is easy in Emacs because files/buffers/functions and other things are lists, and Lisp was always good on fast manipulation of lists.
Following extension packages are recommended:
Using the combination of above you will be able to quickly open files for:
- Project context
All the operations you usually do in Midnight Commander can be done in Emacs as well: finding files, searching for text, replacing in multiple files, copy and move between directories, etc.
|Open file||C-x C-f||find-file|
|Close file||C-x k||kill-buffer|
|Open file (helm)||* C-z C-f||helm-find-files|
|Open file from current project (helm-projectile)||* C-c h p||helm-projectile|
|Show Ztree||* C-x z||ztree-dir|
|Dired (file manager)||C-x d||dired|
|Dired (jump to current file)||C-x j||dired-jump|
|Buffers list||C-x C-b||list-buffers|
All keys starting from * are custom.
Work with remote files
Its a good alternative for editing files on host. Why?
- Sometimes text editor on the other end don’t provide simple things like syntax highlighing or support for various modes - even if you install basic Emacs on other side, it will still require some configuration, and using local editor can be preferrable, especifally when there are a lot of buffer exchange operations with other snippets
- It can be even faster, especially when you open remote files from bookmark.
- In situations like editing file inside of Docker container you would’t have good terminal emulation.
Note on multi-hop
You can open files on remote hosts and hop to next method which can be SSH or sudo.
For example to open file under ‘root’ user on remote ‘smith16’ server do this:
C-x C-f /ssh:smith16|sudo:root@smith16:/etc/
This approach is very good as its a combination of sys-admin work and documentation work. As result of this activity DevOps produces working documentation on some step-by-step process of installation or maintenance.
… See also this one: Literate Devops with Emacs
Management activities: documentation, trackers and calendar
Emacs org-mode is well known suite for managing documentation. The main advantage is that you can write documentation in
org format and then export it to any of preferred formats like Markdown, PDF or Jira/Confluence/Redmine/etc.
Emacs org-mode can connect to trackers like Redmine and Trello and show you the final
Agenda screen for current date. It also contains additional tags, like repeating events or deadlines.
Shared sessions for software development
Using text-based editor is the advantage for pair programming - in some situations you can share your screen with
tmate and then several people can work on the same code.
Powerful text editing abilities
Emacs text editing capabilities are very good. Look at this video for example:
Integration with DVCS
DVCS - Distributed Version Control Systems like
Mercurial. Using those from Emacs makes your life much easier as you don’t need to remember sometimes cryptic commands. It also makes it possible to browse history, branches, revisions and other things easy.
Useful emacs packages
- which-key - shows available key combinations
- flychech - syntax checker
- bm - bookmarks manager
- elpy, jedi - for Python development
- avk-emacs-themes - mine!
… and more at https://emacsthemes.com/
- Input Mono
- Source Code Pro
- DejaVu Sans Mono
- Ubuntu Mono
- BP Mono
- Literate DevOps
- Emacs is great for sysadmins, too
- Emacs for Sysadmins
- Should I learn both, Emacs and Vim as a lifetime text editor?
- system administration with emacs
- My (avkoval) emacs config
Text editors are like wine. The older the better. You do not want a shiny new text editor. You want the text editor that has been around long enough and used by enough geeks that every conceivable pattern of manipulating symbols on the screen has been thought of, and crystallized into a re-usable pack. – Vivek Haldar