A small how to written to assist sys admins. It offers tools and high level advice to solve slow websites problems:

Oh boy it’s been an intense 4 weeks. I was pulled in to assist with troubleshooting several major failures at work with loosely related systems. Including my own. All systems are public facing, hence the intensity.

This article attempts to capture a high level view of one of the problems and the methods and tools used (not how to use the tools, that’s for another time) to try and solve it. I’m not putting all the details in. Some details are emphatically not appropriate, other details won’t increase understanding of the methodology and process taken.

In the interest of helping other sysadmins, I’ve linked to the various tools used. Some are well known, others more obscure.

=> Advanced Sysadmin Troubleshooting: Slow Websites (via RootPrompt)


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CategoryList of Unix and Linux commands
Disk space analyzersdf duf ncdu pydf
File Managementcat cp mkdir tree
FirewallAlpine Awall CentOS 8 OpenSUSE RHEL 8 Ubuntu 16.04 Ubuntu 18.04 Ubuntu 20.04
Modern utilitiesbat exa
Network UtilitiesNetHogs dig host ip nmap
OpenVPNCentOS 7 CentOS 8 Debian 10 Debian 8/9 Ubuntu 18.04 Ubuntu 20.04
Package Managerapk apt
Processes Managementbg chroot cron disown fg glances gtop jobs killall kill pidof pstree pwdx time vtop
Searchingag grep whereis which
User Informationgroups id lastcomm last lid/libuser-lid logname members users whoami who w
WireGuard VPNAlpine CentOS 8 Debian 10 Firewall Ubuntu 20.04
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