pgrep command HowTo - Linux / Unix Q & A from nixCraft

Linux find process by name

in CentOS, Debian / Ubuntu, Linux, RedHat and Friends, Suse last updated January 8, 2018

I am a new Linux user. How can I find a computer program/process by name on Linux? Is it possible to find a process by name instead of PID on a Linux?
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HowTo: Use ps, kill, nice, and killall To Manage processes in FreeBSD and OS X Unix Operating System

in Commands, FreeBSD, FreeBSD Jails (VPS), Mac OS X, OpenBSD, UNIX last updated December 31, 2014

I‘m a new Unix system user. How can I manage process on a FreeBSD operating systems?

CentOS / RHEL: Check If A Service Is Running Or Not

in CentOS, Monitoring, RedHat and Friends last updated December 13, 2013

How do I find out if a service such as MySQL or Apache running on my Centos/RHEL/Fedora Linux server?

Linux / Unix: pwdx Command Examples

in Commands, Linux, UNIX last updated February 1, 2014

I am new Linux and Unix system administrator. How do I find the current working directory of a process or server on Linux or Unix-like system using shell prompt?

Linux: Find Out What Process Are Using Swap Space

in BASH Shell, Debian / Ubuntu, Linux, RedHat and Friends last updated January 15, 2013

The top and free command display the total amount of free and used physical and swap memory in the server. How do I determine which process is using swap space under Linux operating systems? How do I find out swap space usage of particular process such as memcached?

Gracefully Restart Nginx Web Server After Changes Made In a Config File

in Linux, Nginx, UNIX last updated December 6, 2012

I know how to gracefully restart Apache web server under Unix like operating system. I made changes to nginx.conf. How do I gracefully restart Nginx web server? How do I make changes in a Nginx server config file to take effect without restarting the Nginx server itself without interrupting users’ current session?

Linux Verify crond Daemon And Cronjobs Are Running

in CentOS, Debian / Ubuntu, Linux, RedHat and Friends, Ubuntu Linux last updated May 3, 2017

How do I verify or check cronjob is running or not under a CentOS / RHEL / Fedora Linux from a shell prompt?