0
0 is used as a Valid Process identifier. It is used as the PPID for /etc/init that starts everything on the server. The PPID Is the Parent Process Identifier. The Parent Process is Process 0, or the System Startup Process. All processes spawn from this PPID. PID 1 is /etc/init which starts up everything else.
What else can I help you with?
What is a PID and how is it useful when troubleshooting a system?
PID stands for Process Identifier, a uniquely assigned integer that identifies a process in the operating system. In any system, applications use PID to identify the process uniquely. Also, it is used in diagnosing the problems with the process in Multi-Tasking systems.
What is the use of execute command in unix?
There is no traditional 'execute' command in Unix.
What is the Unix command to get the name of a process?
Use the 'PS' (process status) command to find out the name of the executable file for a process. If you use the long form and you know the process id, try: PS -p process-id -l or PS -p process-id -f
Is it possible to use BSD software on Unix systems?
It is possible to use BSD software on Unix systems. It is possible but many do not and they use other softwares on Unix systems beside the BSD software.
Where you can use Unix?
Unix can be used on a large number of mainframes, servers, and workstations. If you would like to use a certified UNIX system on commodity hardware, Solaris 10 can be downloaded free of charge for non-commercial use.
What are the ways to enter into Unix?
To enter into Unix, you can use a terminal emulator on a Unix-based operating system like Linux or macOS. Additionally, you can access Unix remotely via SSH (Secure Shell) from another computer. Alternatively, you can use a virtual machine or a container, such as Docker, to run a Unix environment on a non-Unix system. Lastly, you can boot from a live USB or CD containing a Unix distribution.
Are there still people using unix?
Yes, quite a bit of companies and users use unix.
How do you terminate a process in unix?
Generally any process may be terminated by sending the appropriate signal to it. The command to send signals to a process is called 'kill', and the various signals you can use are identified by 'kill -l' or by 'man kill'
What do you mean by 'processes' in unix environment?
A "process" is a program. In multitasking environments such as Unix or Windows - in fact, in most modern operating systems - the computer can run multiple processes at the same time. Note that not all of such processes need to have a visible window - some can be hidden from the user, until you use a special tool or command to list the processes.
I am currently using windows XP2. For practice purpose i want to use UNIX shell scripting. Without installing UNIX OS how can i use the UNIX shell scripting?
You should be able to download the Unix Services for Windows, version 3.5, from Microsoft (free). There are other shell emulators that are available for Windows, which would allow you to use Unix type shell scripting without installing any additional OS. Your question about "virtual UNIX" is unclear ..
How do you create a tee in unix?
The 'tee' command creates one for you automatically. You would use it to simultaneously look at output from a process and redirect it to a disk file (for example).
Can you use a DOS formatted floppy in UNIX?
Yes you can. Unix understands both FAT32 and NTFS file systems.
