In Unix-based computer operating systems, init (short for initialization) is the first process started during booting of the computer system. Init is a daemon process that continues running until the system is shut down. It is the direct or indirect ancestor of all other processes and automatically adopts all orphaned processes. Init is started by the kernel using a hard-coded filename; a kernel panic will occur if the kernel is unable to start it. Init is typically assigned process identifier 1. Wikipedia
systemd is a suite of basic building blocks for a Linux system. It provides a system and service manager that runs as PID 1 and starts the rest of the system. Homepage
systemd is an init system used by some Linux distributions to bootstrap the user space and manage all processes subsequently, instead of the UNIX System V or Berkeley Software Distribution (BSD) init systems. The name systemd adheres to the Unix convention of naming daemons by appending the letter d. Wikipedia
Systemd is an init system and system manager that is widely becoming the new standard for Linux machines. While there are considerable opinions about whether systemd is an improvement over the traditional SysV init systems it is replacing, the majority of distributions plan to adopt it or have already done so. DigitalOcean
systemctl — Control the systemd system and service manager. systemctl may be used to introspect and control the state of the "systemd" system and service manager. Homepage
systemctl command, the central management tool for controlling the init system
root@edison:~# systemctl status clloader
● clloader.service - Daemon to handle arduino sketches
Loaded: loaded (/lib/systemd/system/clloader.service; enabled)
Active: active (running) since Sun 2016-05-08 04:15:11 UTC; 54min ago
Main PID: 209 (launcher.sh)
CGroup: /system.slice/clloader.service
├─209 /bin/sh /opt/edison/launcher.sh
└─210 /opt/edison/clloader --escape --binary --zmodem --disable-ti...
May 08 04:15:11 edison systemd[1]: Started Daemon to handle arduino sketches.
May 08 04:15:11 edison launcher.sh[209]: Opened /dev/ttyGS0 as inputOpened /...s
Hint: Some lines were ellipsized, use -l to show in full.
root@edison:~# systemctl status sketch_reset
● sketch_reset.service - Daemon to reset sketches
Loaded: loaded (/lib/systemd/system/sketch_reset.service; enabled)
Active: active (running) since Sun 2016-05-08 04:15:11 UTC; 55min ago
Main PID: 211 (sketch_reset)
CGroup: /system.slice/sketch_reset.service
└─211 /opt/edison/sketch_reset -i 207 -o 215 -s /opt/edison/sketch...
May 08 04:15:11 edison systemd[1]: Started Daemon to reset sketches.
root@edison:~# systemctl status rsmb
● rsmb.service
Loaded: not-found (Reason: No such file or directory)
Active: inactive (dead)
root@edison:~# systemctl status mdns
● mdns.service - Zero-configuration networking
Loaded: loaded (/lib/systemd/system/mdns.service; enabled)
Active: active (running) since Sun 2016-05-08 04:15:14 UTC; 53min ago
Main PID: 265 (mdnsd)
CGroup: /system.slice/mdns.service
└─265 /usr/sbin/mdnsd
May 08 04:54:08 edison mDNSResponder[265]: mDNSPlatformSendUDP got error 99 ...3
May 08 04:54:08 edison mDNSResponder[265]: mDNSPlatformSendUDP got error 99 ...3
May 08 04:54:12 edison mDNSResponder[265]: mDNSPlatformSendUDP got error 101...3
May 08 05:00:00 edison mDNSResponder[265]: mDNSPlatformSendUDP got error 99 ...3
May 08 05:00:00 edison mDNSResponder[265]: mDNSPlatformSendUDP got error 99 ...3
May 08 05:00:01 edison mDNSResponder[265]: mDNSPlatformSendUDP got error 99 ...3
May 08 05:00:01 edison mDNSResponder[265]: mDNSPlatformSendUDP got error 99 ...3
May 08 05:00:08 edison mDNSResponder[265]: mDNSPlatformSendUDP got error 99 ...3
May 08 05:00:08 edison mDNSResponder[265]: mDNSPlatformSendUDP got error 99 ...3
May 08 05:00:09 edison mDNSResponder[265]: mDNSPlatformSendUDP got error 99 ...3
Hint: Some lines were ellipsized, use -l to show in full.
root@edison:~# systemctl status edison_config
● edison_config.service - The Edison status and configuration service
Loaded: loaded (/lib/systemd/system/edison_config.service; enabled)
Active: active (running) since Sun 2016-05-08 04:15:15 UTC; 54min ago
Main PID: 289 (su)
CGroup: /system.slice/edison_config.service
‣ 289 /bin/su root -c node /usr/lib/edison_config_tools/edison-con...
May 08 04:15:15 edison systemd[1]: Started The Edison status and configurat...e.
May 08 04:15:15 edison su[289]: Successful su for root by root
May 08 04:15:15 edison su[289]: + ??? root:root
May 08 04:15:15 edison su[289]: pam_unix(su:session): session opened for us...0)
Hint: Some lines were ellipsized, use -l to show in full.
root@edison:~# systemctl status systemd-resolved
● systemd-resolved.service - Network Name Resolution
Loaded: loaded (/lib/systemd/system/systemd-resolved.service; enabled)
Active: active (running) since Sun 2016-05-08 04:15:14 UTC; 56min ago
Docs: man:systemd-resolved.service(8)
Main PID: 253 (systemd-resolve)
Status: "Processing requests..."
CGroup: /system.slice/systemd-resolved.service
└─253 /lib/systemd/systemd-resolved
May 08 04:15:14 edison systemd[1]: Started Network Name Resolution.