Linux For Beginners & Advanced Users

Tutorials, howtos, faqs, hacks, and tips about GNU/Linux operating systems for Linux users sorted by easy, intermediate and advanced level. ( rss feed ).

I am a new Unix system admin. How do I find ouw who has recently use the Linux or Unix-like server? Which terminals they used, and when they logged in and out of the my server?

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whereis command

I am a new Linux and Unix-like system command line user. How do I find and locate the binary, source, and manual page files for a given command?

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I have four Apache backend servers in front of nginx reverse proxy server. How do I make sure nginx reverse proxy load balancer always send specific client IP address (say IP 1.2.3.4) request to http://apachereadwrite/ backend and rest to http://apachereadonly/ backend?

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Is there is a tool that can provide me a maximum of information (such as cpu, disk I/O, network, nfsd, memory and more) about my Linux/Unix server in a minimum of space in a terminal?

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I am a new Python user. I would like to delay execution for five seconds in a Python script. How do I add a time delay in Python on Unix/Linux? Is there a sleep command in python like the Unix/Linux sleep utility to suspend execution of a bash script?

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Apache has status page that can provide data about Apache. How do I enable and display such page using nginx server? How do I enable nginx status page on Linux or Unix-like operating systems?

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My MySQL database installation has been corrupted. I would like to delete old mysql server. How do I reinstall MySQL database server version 5.x on Linux or Unix-like oses? A software upgrade broke my system. How can I uninstall and re-install mysql again to get fresh full mysql again?

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