What does the init command do?

init stands for initialization. In simple words the role of init is to create processes from script stored in the file /etc/inittab which is a configuration file which is to be used by initialization system. It is the last step of the kernel boot sequence. /etc/inittab Specifies the init command control file.

How do I start a process in AIX?

init process start from / in the rootvg

  1. /etc/init starts and reads /etc/inittab ( LED=553)
  2. runs /sbin/rc.boot 3.
  3. fsck -f /dev/hd3 i.e. check /tmp.
  4. mount /tmp.
  5. sysncvg rootvg &; i.e. run syncvg in background and reportstale PPs.
  6. cfgmgr -P2 i.e. run cfgmgr in phase 2 in normal startup. (

What is runlevel in AIX?

The system run level specifies the system state and defines which processes are started. The /etc/inittab file contains a record for each process that defines run levels for that process. When the system boots, the init command reads the /etc/inittab file to determine which processes to start.

How do I check my AIX runlevel?

At the command line, type cat /etc/. init. state . The system displays one digit; that is the current run level.

What is make init?

Init is the parent of all Linux processes. It is the first process to start when a computer boots up and it runs until the system shuts down. It is the ancestor of all other processes. Its primary role is to create processes from a script stored in the file /etc/inittab.

How do I check my system runlevel?

For SysVinit system, it will be execute from the following location.

  1. Run level 0 – /etc/rc.d/rc0.d/
  2. Run level 1 – /etc/rc.d/rc1.d/
  3. Run level 2 – /etc/rc.d/rc2.d/
  4. Run level 3 – /etc/rc.d/rc3.d/
  5. Run level 4 – /etc/rc.d/rc4.d/
  6. Run level 5 – /etc/rc.d/rc5.d/
  7. Run level 6 – /etc/rc.d/rc6.d/

What init means?

: to say something that causes someone to be embarrassed, upset, or hurt especially when the speaker did not expect that reaction.

What is an init script?

An init script is a shell script that runs during startup of each cluster node before the Apache Spark driver or worker JVM starts. Some examples of tasks performed by init scripts include: Install packages and libraries not included in Databricks Runtime.

How do I shut down Linux?

Linux shutdown commands are entered in the Linux terminal that is launched by using the keyboard shortcut[Ctrl] + [Alt] + [T]. You can then close the terminal window with the shortcut [Ctrl] + [D]. Command for shutting down Linux at 5:30 p.m.

How do I start Aix services automatically?

To have services started up automatically, AIX offers (similar to other UNIX/Linux operating systems) the inittab file to achieve this. From /etc/inittab you can either: Start the services directly from within inittab by issuing a command (script) to be run.

What is the PPID of a process on AIX?

On AIX there are two types of processes – regular processes and kernel processes. Kernel processes, also known as kprocs, are special processes that are created and used by the kernel. Regular processes can be displayed with the ps -ef command, and kernel processes can be displayed with the ps -kf command. The PPID of kernel processes is always 0.

How do I boot Aix in single user mode?

Booting AIX in Single-User Mode. 1 1. Boot system with no media in the CD/DVD drive. 2 2. Wait until you see the options of choosing another boot list, and hear beeps on the console. 3 3. Press 6 to start diagnostics. 4 2. Select Operations -> Activate. 5 3. In the Activate window, click the button that says “Advanced”.

How to activate the LPAR in Aix?

1. Select the LPAR in the HMC GUI 2. Select Operations -> Activate 3. In the Activate window, click the button that says “Advanced” 4. Change “Boot mode” to “Diagnostic with stored boot list” 5. Click “OK” to save that change, then “OK” again to activate. Welcome to AIX.

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