Process Identifier (PID)

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32
votes
5answers
40k views

what permission to write PID file in /var/run

Ubuntu touch: cannot touch `/var/run/test.pid': Permission denied I am starting start-stop-daemon and like to write the PID file in /var/run start-stop-daemon is run as my-program-user /var/run ...
28
votes
5answers
51k views

How to get pid of just started process

I want to start process (eg. myCommand) and get its pid (to allow to kill it later). I tried ps and filter by name, but I can not distinguish process by names myCommand ps ux | awk '/<myCommand&...
23
votes
3answers
3k views

Given a PID on Windows - how do I find the command line instruction that executed it?

On a database, I can get a list of all the currently running processes, and the sql command that kicked them off. I'd like to do a similar thing on a windows box. I can get the list of processes, ...
16
votes
2answers
10k views

Directory in /var/run gets deleted after hard reboot

I keep my sphinx pid in /var/run/sphinx/searchd.pid but every time I hard reboot the directory /var/run/sphinx disappears and sphinx fails to start. Is there a way to make that directory stick or ...
12
votes
4answers
32k views

The PID of a bash child proccess (imapsync) - how do you get it?

Can any one tell me how to get the PID of a command executed in bash. E.g. I have a bash script that runs imapsync. When the script is killed the imapsync process does not always get killed, so I'd ...
10
votes
1answer
19k views

Init script does not create a PID file

I need to create an init script for an IRC logger. I copied /etc/init.d/skeleton. I filled in the configuration section to fit my needs and I also had to add --background to the start daemon command ...
8
votes
3answers
8k views

What is the range of a PID on Linux and Solaris?

What is the maximum and minimum value for a PID (Process ID) on Linux and Solaris?
8
votes
5answers
6k views

Are .pid files reliable for determining whether a process is running?

Many programs such as sshd create .pid files in /var/run/ that contain their process ID. Are these files reliable for determining whether a process is running? My guess is that these files are ...
8
votes
4answers
18k views

What's a proper way of checking if a PID is running?

I have a .pid file, and I need to check if the process is running. So far I found two options kill -0 `cat something.pid` which prints out an error if the pid isn't running. I know this can be ...
7
votes
5answers
6k views

how to get process file name from PID in MacOS?

Is it possible to get a file name of a process using PID? ps displays a lot of useful information about a process, but not a hint about a process executable file location.
6
votes
2answers
7k views

Can start-stop-daemon use environmental variables?

I need to daemonize a Windows app running in Wine, and create a pid in /var/run. Since it requires an X11 session to run, I need to make sure the $DISPLAY variable is set in the running user's ...
5
votes
1answer
23k views

How to find the .pid file for a given process

I'm setting up monit and want to monitor a given python application. Monit does this by looking at the .pid files for processes, but I don't know where this would be. I also tried creating my own ...
5
votes
2answers
10k views

Can't create PID file on MySQL server, permission denied

The MySQL server won't start and is reporting the following error: /usr/local/mysql/bin/mysqld: Can't create/write to file '/usr/local/mysql/data/James-Barnhills-Mac-Pro.local.pid' (Errcode: 13) ...
4
votes
2answers
5k views

Possible to send kill signal to all processes with a given ppid?

I have found myself having to regularly send kill -STOP one million processes, but they all come from the same parent. Is there a smarter way to do this?
4
votes
8answers
33k views

Port 80 is being used by SYSTEM (PID 4), what is that?

I am trying to use port 80 for my application server, but when I perform "netstat -aon" I get TCP 0.0.0.0:80 0.0.0.0:0 LISTENING 4 When I look up the process in ...
4
votes
2answers
911 views

Is it normal for PID's to be over 65535?

I have a managed VPS running on CloudLinux 6.6 x86_64 standard. It has a few websites with MySQL, PHP and Apache running with CPanel. I am working on a PHP system that needs to manage a PID and ...
4
votes
1answer
2k views

How to get the PID of a process started by /bin/su -c

I'm writing a init.d-script for an java-app. But the java-app should be run by another user. (The OS I'm using is Debian Squeeze.) I already got this: /bin/su - $USER - c "cd $PATH;echo $PASSWORD | ...
3
votes
1answer
1k views

Can I recover a nano process from a previous terminal?

My system crashed while I was in a nano session with unsaved changes. When I log back in via SSH I see the nano process still running when I do a ps. davidparks21@devdb1:/opt/frugg_batch$ ps -ef | ...
3
votes
1answer
349 views

AIX: is it somehow possible to get a ForeignAddress/PID pair like we are able to get in Linux with netstat?

In Linux (RHEL), we are able to get a ForeignAddress/PID pair with "netstat -ntp" command: [root@rhel ~]# netstat -ntp Active Internet connections (w/o servers) Proto Recv-Q Send-Q Local Address ...
3
votes
2answers
312 views

Reduce PID_MAX Safely

I have one server in a cluster that was experiencing a process table leak. Because the developer responsible for the code was unavailable for a few days I increased pid_max on the machine as follows: ...
3
votes
1answer
642 views

Looking for way to log process terminations on OS X (Mac)

I'm looking for a way to log all process terminations on my Mac (OS X 10.6.8). (And see pid, timestamp, process name) I've implemented something similar for HP-UX, but it required a kernel-level ...
2
votes
2answers
9k views

Does kill -3 actually terminate a java process? Or just generate a thread dump?

CentOS 5.9 If I run kill -3 <java process pid> what actually happens? As per this red hat article, I understand that a Java Thread Dump is generated but is the process terminated? It doesn't ...
2
votes
2answers
189 views

How to map an ephemeral port to a pid?

I have a RHEL server with several apps on it and I am attempting to figure out which one of them is making calls to an external web service. I have TCP dumps that show the calls being made and through ...
2
votes
4answers
3k views

Apache process consumes too much CPU

I have an ubuntu apache/php server running php doing appx 100 hits/sec and a PHP cron running in the background. I get occasionally high CPU load on one of the Apache processes which stays high ...
2
votes
2answers
818 views

How can I enable pid and ppid fields in psacct dump-acct?

I am currently using the psacct package on Centos to perform accounting on processes run by users. The info file1 suggests that it is possible to output pid and ppid depending on what information ...
2
votes
2answers
1k views

If I know the PID number of a process can I know its name?

If I have the PID number for a process (on a UNIX machine), how can I know the name of its associated process? What do I have to do?
2
votes
1answer
77 views

Ubuntu: Postfix and Cyrus expecting saslauthd PID file in different locations

I'm running postfix and cyrus in parallel on my server, as far as I understand this is a quite common think to do. Both daemons use sasl authorization. However, postfix is looking for the saslauthd ...
2
votes
3answers
7k views

sshd running but no PID file

I'm recently started using monit to monitor the status of sshd on my CentOS 5.4 server. This works fine, but every so often monit reports that sshd is no longer running. This isn't true - I am still ...
2
votes
1answer
38 views

How properly handle deletion of pid.file in service script

I'm trying to write service script for application. So I can control it like this: ./myscript.sh start|stop|status On startup pid.file with process id creates, and based on it I can check status ...
2
votes
0answers
33 views

Process identifier mask in z/OS

I've noticed a curious pattern to process identifier numbers on the z/OS system I'm working on (uname reports it as OS/390), they're either 1-4 digits long or 8 digits long but never in between. The ...
2
votes
3answers
3k views

How to kill these PHP process safely?

I have installed php5 in ubuntu and WordPress. It can run after installed. But after few days I've found there are lots of process and occupied a lot of memories. I try to use ps -aux | grep www-data ...
1
vote
3answers
14k views

PID history of a process

What I want to know is PIDs that were assigned to a process before its last 2-3 restart. Scenario is after this particular process crashes, a log file is generated and PID of the process is ...
1
vote
2answers
1k views

screen command process id

First of all sorry for my bad english and i am new at linux. When i do this, it can write process id to pid file start () { echo -n "Starting someserver.jar: " java -jar /home/someserver/...
1
vote
2answers
966 views

PID file for C program for monit [closed]

How can I create a pid file for a C program to be used in monit, and how do I monitor that C program using monit?
1
vote
1answer
2k views

Thread dump to a file

I read that I can find the process ID and then use kill command to save the thread dump to a file. But the following example does not return anything... # ps aux | grep -i java wcuser 9136 0.0 17....
1
vote
4answers
4k views

Nagios monitor process by pid file

Is there any possibilty to monitor processes with nagios? I found the check_procs command, which I can't use because it doesn't let me specify a file to read the PID from. Also, I don't seem to find ...
1
vote
2answers
839 views

Where is the apache pid file on Gentoo?

I need it to configure Monit, but the path in the sample config file is /usr/local/apache/logs/httpd.pid and it's not there. It's also not anywhere in /etc (at least not with that name).
1
vote
3answers
2k views

Identify PID of a transient network connection on HP-UX 11.23

We've tried lsof and tcpdump to capture the PID of a process that is attempting to make connections. Any ideas?
1
vote
2answers
84 views

Clustered cron with one server only overlap allowed

I've setuped load balancers: lb1 (active) and lb2 (passive), Glustered web servers: web1 (active), web2 (backup), and some clustered database. Both web servers and databases are A pointed to the VIP ...
1
vote
2answers
223 views

Problems with pid files when restoring OpenVZ snapshot

I am trying different ways to take snapshots of running openvz containers. Following this guide : http://openvz.org/Checkpointing_and_live_migration, I always encounter an issue with pid files ...
1
vote
2answers
493 views

pid directory is deleted

I'm having a service (Sonatype's Nexus) which failed to init since it PID folder (/var/run/nexus) was deleted. Any idea how that folder can be deleted? The nexus service, when gracefully stopped, ...
1
vote
5answers
682 views

Get the pid if 2 tomcat(s) is running

I have 2 tomcat's running, how do I get the pid if both have similar names? ps -ef | grep java root 12952 1 0 10:01 pts/0 00:00:03 /usr/lib/jvm/jre/bin/java -Djava.util.logging.config....
1
vote
1answer
13k views

MySQL server quit without updating PID file

I need help on how to start the mysql server. The problem arise when the root directory was full. To be able to login to directadmin and start mysql, I added a soft link of the /var/lib/mysql/ to /...
1
vote
1answer
142 views

Making directories visible only by owners

I am in the process of creating a secured shared hosting and, between the hosting features, I want to give SSH access. I've already chrooted the users via SSH, FTP and PHP (using PHP-FPM), and would ...
1
vote
1answer
32 views

zombie lxc swap file: text file busy but no pid

I have a server running Ubuntu 12.04.5 LTS (Precise Pangolin). On that server I created a new Linux container: $ sudo lxc-create -n mycontainer After a while I decided to get rid of this container: ...
1
vote
1answer
174 views

RamMap shows millions of processes that Task manager doesn't

I have a server 2008 box with 32GB RAM on and i have been investigating why it runs out of memory every 150 ish days. Task manager shows that we are running at 99% memory usage but all the processes ...
1
vote
0answers
19 views

When is a pid needed in log rotation?

I've read that providing pid in the newsyslog.conf is to ensure that the process writes in the new log file. However, I've tried log rotation without providing a pid because I couldn't find one for ...
1
vote
0answers
168 views

Upstart shows non-existent process running

I am using upstart 1.8-0ubuntu1 on Ubuntu-1210-quantal-64-minimal. It shows me nginx to be running, when it's not. # service nginx status nginx start/running, process 2543 # ps -p 2543 PID TTY ...
1
vote
1answer
108 views

failure daemon and changing pid number

proftpd, sshd and apache processes run with /etc/init.d/its-script on linux distro. I was monitoring 21, 22 and 80 ports with farm monitoring service: every 5 minutes service check each port and ...
1
vote
2answers
1k views

freebsd pid file not created

Pid files not created in /var/run folder. rc.d script: #!/bin/sh . /etc/rc.subr name=phpcgi rcvar=phpcgi_enable pidfile=/var/run/${name}.pid command=/usr/local/bin/php-cgi load_rc_config $name ...