What is Dietpi,,,,
DietPi is a extremely lightweight Debian Jessie OS. With images starting at 400MB, thats 3x lighter than 'Raspbian Lite'.
Here the different about rasbian lite and dietpi.
| DietPi v100 (Jessie) vs Raspbian Lite (Jessie). 11/11/15 | |||
| System used = RPi v2 / Sandisk Extreme 16gb / Official RPi PSU (2amp) | |||
| Find out More: DietPi.com | |||
| General Stats | Description | DietPi | Raspbian Lite |
| Total Image Size | Once uncompressed, total size of image. Lower is better. | 589 MB | 1424 MB |
| Minimum SD Card Size | The lowest possible SD card size required to run. | 1 GB | 2 GB |
| Memory Usage (RAM) | Total memory usage after boot. Lower is better | 23 MB | 27 MB |
| Total Processes | How many programs and services are running after boot. Lower is better. | 11 | 18 |
| Total Installed Packages | Lower is better. | 265 | 406 |
| Bootup Time (Seconds) | How long it takes the system to display the login prompt. | 14.2 Seconds | 15.5 Seconds |
| Root Filesystem Usage | Lower is better (includes swapfile of 100mb) | 533 MB | 931 MB |
| Core System Optimizations | Description | DietPi | Raspbian Lite |
| Ramlog | Storing logfiles to RAM, instead of DISK, will improve SD card lifespan and system performance | RAM - DietPi-Ramlog | Disk |
| Swapfile swapiness | A lower value ensures the swapfile isn't used, unless your system is out of memory. | 1 | - |
| NTP Usage (System time) | Does ntpd close when its updated the time to save resources? | Yes + Other Choices | No |
| Auto HDD spindown | HDparm will power off drives when idle to reduce power usage. | 10 Minutes | - |
| System Response Times | Latency before the ondemand CPU govenor can check to increase CPU clocks. Lower provides better system response times. | 25 Milliseconds | 100 Milliseconds |
| Temp mounted to Ram | Are temp files stored on disk or RAM? Ram can improve performance. | RAM | Disk |
| Scheduler | Noop or Deadline. Noop should increase performance for systems with SSD (including SD) drives. | Noop | Deadline |
| Programs & Features | Description | DietPi | Raspbian Lite |
| Lightweight SSH Server | Dropbear is lightweight | OpenSSH is bulky, yet feature rich. | Dropbear + Other Choices | OpenSSH |
| Automatic Filesystem Expansion | Allows your system to use the full size of your SD card | Yes | manual (raspi-config) |
| Dedicated USB Drive | Quickly and easily use your USB drive on your system. DietPi will also configure your software installations to use it automatically. | Yes | - |
| DietPi-Software | Optional, automated installation, configuration and optimizations of popular software. | DietPi-Software | - |
| DietPi-Config | Feature rich configuration system for your device. | DietPi-Config | raspi-config |
| Network Configuration Tool | Allows you to setup your Wifi/Ethernet connection with ease. | DietPi-Config | - |
| Tweak CPU Settings | eg: adjust CPU governors (eg: ondemand/powersave), upscale threshold, temp limits etc. | DietPi-Config | - |
| Autostart Options | Choose which software runs after boot. | DietPi-AutoStart | - |
| Optional System Stats Display | Turn your monitor or 320x240 LCD into a lightweight system stats display. | DietPi-Cloudshell | - |
| DietPi-Backup | Allows you to backup and restore your entire system using a simple menu. Rsync based. | DietPi-Backup | - |
| DietPi-Cleaner | Removes unwanted "Junk" from your system. | DietPi-Cleaner | - |
| DietPi-Sync | Duplicates one directory to another (mirror sync). Rsync based. | DietPi-Sync | - |
| DietPi-Cron | Allows you to change cron start times from a simple menu interface | DietPi-Cron | - |
| DietPi-Process Tool | Tweak and customize program nice, affinity and scheduler priorities (EG: FIFO) for most installed software. | DietPi-Process Tool | - |
I aggre about the lightweight Justice what about you....
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