113 lines
6.3 KiB
Markdown
113 lines
6.3 KiB
Markdown
# [MOTDfetch][motdfetch_repo]
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**MOTDfetch** is a modular & dynamic **MOTD replacement** written in Bash and a nice **command line information tool** for Debian/Ubuntu systems.
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>*MOTD - "message of the day"
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>Feature used on Unix-like CLI systems to send a common message to all users after a successful login, and just before it executes the login shell.
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>Newer Unix-like systems may generate the message dynamically when the host boots or a user logs in.*
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**Drawbacks** with the current implementation of **MOTD with PAM on Debian and Ubuntu** are at least 3:
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1. The **SSH client does not decide** whether to activate the MOTD.
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As it is loaded before the shell login is opened:
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2. User has to **wait blindly** for the end of the execution if there is a dynamic script.
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3. Scripts **can not check the user sessions** status.
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MOTDfetch **avoids** and partially **disable the original MOTD implementation**, but **remains compatible** with it for PAM login.
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---
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>###### Table of contents
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>**[FEATURES](#features)**
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>**[INSTALLATION](#installation)**
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>**[USAGE](#usage)**
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[![Preview of MOTDfetch][preview_image]][preview_image_url]
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---
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## Features
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- Usable as a **command**, a **login MOTD** or **SSH MOTD**.
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- **[8 Core modules](#8_core_modules)**.
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- Uniform and **easily customizable**.
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- **Emphasis** of important elements and status by **colors, symbols or flashing**.
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- **Notice message** upon missing dependencies
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- **Reduced operation mode fot high load** (enforceable).
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- Separate **system and users configuration** files.
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- **Scripted installation** and updates.
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- **Modules or sections can be disabled**.
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- Standalone **executable modules**.
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### 8 Core modules
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#### **HEADER module**
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- decorative banner (custom text or username)
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- welcome message with username, date and time
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- user mail inbox status
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#### **SYSYINFO module**
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- distribution name, kernel version, uptime
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- CPU, cores, load, processes, memory, swap
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- hostname, network interface, DNS servers, public IPs/DNS/rDNS records
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- custom external API for public IP check
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- skip connectivity related tests if the API check fail
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- short timeout on dig & curl commands to keep the script snappy
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#### **SERVICES module**
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- check systemd services status
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- by service name and user UID if not system
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- :warning: user cannot check other user's services
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#### **FILESYSTEM module**
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- 2 sections: general filesystems, ZFS filesystems
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- name, fs type, usage and size of disk or ZFS pool
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- inodes usage and size when relevant
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- health status for ZFS
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- custom usage threshold for warning hints
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#### **TLS module**
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- check X.509 certificates status with openssl
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- accept domain and optional port (443 by default)
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- validate name correspondence and expiration date
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- skip the test if there is no internet connectivity
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- short timeout on openssl command to keep the script snappy
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#### **POSTQUEUE module**
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- postfix deferred queue status
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- short timeout on the parsing to keep the script snappy if there is thousands of mails
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#### **FAIL2BAN module**
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- display fail2ban jails status
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- :warning: need to be executed with root or sudo
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#### **USERSLOG module**
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- display last user logged in
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- name, IP and connection range
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- if the current user is different, display his last log too
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- display currently logged sessions with usernames
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## Installation
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### Requirements
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## Usage
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---
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[//]: # (LINKS)
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[motdfetch_repo]: https://git.tkapias.net/tkapias/MOTDfetch
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[preview_image]: docs/img/preview.jpg "Preview of MOTDfetch"
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[preview_image_url]: https://git.tkapias.net/tkapias/MOTDfetch/raw/master/docs/img/preview.jpg
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