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

Linux find process by name

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

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?
Continue reading

HowTo: Use ps, kill, nice, and killall To Manage processes in FreeBSD and OS X Unix Operating System

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

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

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

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

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

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

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

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

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

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

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

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