Process Identifier (PID)

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3
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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 | ...
0
votes
1answer
1k views

Could not access pid file for elasticsearch

I am not a die-hard linux engineer, but I am having some problems with starting Elastic Search. Some stats: Server: Ubuntu Server 11.04 Elastic Search: 1.2.3 (installed with appitude) When I start ...
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 ...
0
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1answer
56 views

How to identify if a process is unique vs a coincidental same PID?

Having the ability to identify a PID for a process, let's say HTTPD for example, how can I determine later on, on that same server, if that PID/Process is still the original one ? For instance, I ...
0
votes
1answer
88 views

systemd, logrotate and PID-files

I'm packaging some daemon for debian 8 and systemd. The daemon can create PID-file by itself, but it has no permissions to write into /run because of non-root user. It used to create PID-file via old ...
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
33 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: ...
0
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0answers
14 views

OpenStack Swift: PID files don't correspond to running processes' PIDs; can't restart services - port already bound

I am running a Docker container with Swift ("Swift all-in-one") on a CentOS 7 host. I noticed that the PIDs in /var/run/swift/*.pid files differ from the actual PIDs running in the system: root@...
2
votes
1answer
41 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 ...
-1
votes
1answer
57 views

pidof service doesn't exist

I am trying to set init.d script for some service - let it be uptime that is located in /usr/bin/uptime. Here is my script: #!/bin/bash # description: read service #Source function library . /etc/rc....
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 ...
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 ...
0
votes
1answer
916 views

Apache Failure on Centos 7 not starting

hellau everyone, i have a problem, that i cant resolve alone, so i need your help. i have installed on a centos 7 apache when im asking for the status of the service (systemctl status httpd) so i ...
1
vote
1answer
175 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 ...
-2
votes
1answer
114 views

How to run a program in a new PID namespace

How to run a program in a new PID namespace? All tutorials on the internet show writing some custom C code in order to do it. Is there a command instead for that?
8
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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 ...
1
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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 ...
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 ...
0
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3answers
44 views

Log pid than cpu higher than a value

I'm looking for a way to log the pid of process higher than a fixed value of cpu (ex 40%). I tried with command like this : ps -eo pcpu,pid,user,args | sort -k 1,2 -r | head -10 But, first, it sorts ...
0
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1answer
101 views

Where to create an AF_LOCAL/AF_UNIX socket file when not allowed to write in /var/run?

FSH says that socket and pid files should go to /var/run However, for security purpose, only root can creates file and subdirectories in this location. A common solution is creating a subdirectory ...
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, ...
12
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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 ...
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 ...
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 ...
1
vote
5answers
687 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....
3
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2answers
313 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: ...
4
votes
2answers
916 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 ...
1
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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/...
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votes
1answer
68 views

How to get a process ID automaticly with command prompt [closed]

I´d want to know how to get a PID of a process with a single command in command prompt. I tried it with findstr, but I´m (apparently) not so smart to figure it out. You cannot use tasklist, because ...
-2
votes
1answer
523 views

Pid and Lock files are not created in Nginx custom build Centos 7

I am trying to install nginx from source. After make install, I had a look at /var/run/ folder but I cant find the nginx.pid file and nginx.lock files there. This is my configuration: sudo ./...
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 ...
0
votes
1answer
503 views

Restarting shell script with &disown using Monit

I have a shell script that runs a C++ backend mail system (PluginHandler). I need to monitor this process in Monit and restart it if it fails. The script: export LD_LIBRARY_PATH=/usr/local/lib/:/...
0
votes
1answer
638 views

Weird stuff in server error log?

I have a PHP script that shuts down server processes based on their PIDs. It seems like it works well, however, I found this weird stuff in Apache's error log. Any idea on what it's saying? [Thu Jul ...
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 ...
28
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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&...
2
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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 ...
8
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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?
0
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1answer
2k views

Monit is not restarting process

I have monit to monit a process but it doesn't realize it is down. My monit configuration is this: check process xxx with pidfile /var/run/xxx.pid group yyy start program = "/etc/init.d/xxx start" ...
0
votes
1answer
1k views

sh bash script ambiguous redirect pid of file using single quotes

I have the following new line in my .sh file su --session-command='$javaCommandLine & >>$serviceLogFile 2>&1 & echo \$! >$pidFile' $serviceUser || return 1 When I had it ...
2
votes
2answers
190 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 ...
1
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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 ...
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.
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?
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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?
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 ...
0
votes
2answers
688 views

What happens when pid_max is reached

As the title suggests, what happens when pid_max (32bit standard is 32768) is reached with many zombie-processes? On our server a user generates a lot of suphp defunct zombie processes and this ...
0
votes
1answer
109 views

Interfacing strace with Process Name instead of PID

How do I implement a wrapper script pstrace in bash that changees the interface of [sudo] strace -c -p [PID] to [sudo] pstrace -c -p [PROCESS-NAME] similar to how killall [PROCESS-NAME] is ...
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 ...
3
votes
1answer
643 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 ...
0
votes
1answer
24 views

dead parents tree for debugging

$ ps UID PID PPID C STIME TTY TIME CMD il 17626 1 0 14:02 ? 00:00:00 /bin/bash /usr/bin/xdg-open file:///media/distrpart/Downloads/utorrent/test.png I want to ...