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Tag: pid

can i delete nohup.out, Because it stopped writing?

I executed a python code in the AWS Lightsail linux server in the background It contains 5M Records insertions and I added logs after every insertion. I don’t see log output after 852. I Can see my process is still running the background If I delete the nohup.out file will it recreate the file with new Logs? How can I

ProcessHandle returns ambiguous results

I’ve two Java 11 methods that check whether a process for a given PID is running: When checking multiple PIDs on Linux clients, I’m getting sometimes different results for certain PIDs, where the first implementation always returns true and the second one always false. Checking some “false positives” with shell command ps -ef | grep <pid> shows that first implementation

Error: Unable to write pid file Mosquitto v2.0.3

since I updated Mosquitto v2.0.3 on Ubuntu 16.04 the users can’t connect to the broker. When I tried to run with /usr/sbin/mosquitto -c /etc/mosquitto/mosquitto.conf it threw the following message. 2020-12-22|12:37:02: Error: Unable to write pid file. I saw some people had the same problem, so I added pid_file /var/run/mosquitto/mosquitto.pid in mosquitto config but the problem did no go away. I

Python’s daemon PPID not equal to 1

Creating daemons in Linux is quite complex issue, but it’s very well documented in daemon(7) manual. Thankfully there is python-daemon module for Python 2 and 3 that implement PEP3143, so I’m using it. Here comes the question: when I was playing with python-daemon module I was surprised that daemon’s PPID is not 1. Why? Simple example: Content of test.log after

Given a PPID, how to find all of associated PID?

It might be a weird question as I searched and found many people asking about how to find the PPID given a PID. However, I’m interested in finding out all the PID of a given PPID. The incentive was to run a process check using pidstat and from my test with pidstat, it seems to be that pidstat only reports

What is a .pid file and what does it contain?

I recently come across a file with the extension .pid and explored inside it but didn’t find much. The documentation says: A Pid-File is a file containing the process identification number (pid) that is stored in a well-defined location of the filesystem thus allowing other programs to find out the pid of a running script. Can anyone shed more light

Wait until a certain process (knowing the “pid”) end

I have this: Then i do this: I think this is not the best way to wait for the process to terminate, there must be some function wait or something, but i can’t find it. Disclaimer: The process is not a child process Answer I’m not really a Python programmer, but apparently Python does have os.waitpid(). That should consume less

Determine programmatically if a program is running

In C, how can I find out programmatically if a process is already running on Linux/Ubuntu to avoid having it start twice? I’m looking for something similar to pidof. Answer You can walk the pid entries in /proc and check for your process in either the cmdline file or perform a readlink on the exe link (The following uses the

How do I find my PID in Java or JRuby on Linux?

I need to find the PID of the current running process on a Linux platform (it can be a system dependent solution). Java does not support getting the process ID, and JRuby currently has a bug with the Ruby method, Process.pid. Is there another way to obtain the PID? Answer If you have procfs installed, you can find the process

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