ps command

I manage MS-Windows server and recently started to play with OpenBSD server. How do I reload or restart the dhcpd server on OpenBSD using shell command line option?

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

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pwdx command

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?

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How do I view minor and major page faults statistics for a process under Linux operating systems?

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I‘m using ps command to read a snapshot of the current processes under Unix / Linux operating systems. However, ps -e or ps aux only displays command / processes names. I need to see complete information about the process including all parameters passed to it. How do I see it under Unix / Linux using ps command?

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How can I find all the file descriptors used by a process such as httpd (Apache web server) or mysqld (MySQL Database server)?

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How do I stop a process under Ubuntu Linux using command line and GUI tools?

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