pgrep command – nixCraft

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

December 31, 2014December 31, 2014in 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

June 9, 2013December 13, 2013in 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

January 22, 2013February 1, 2014in 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

January 15, 2013January 15, 2013in 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

December 6, 2012December 6, 2012in 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

June 8, 2008May 3, 2017in 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?