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theshell

Joined: April 8, 2023
Articles: 213
Comments: 2

CentOS

Unable to register authentication agent. Cannot determine user of subject Error registering authentication agent.

We’re running Atomicorp’s Workload Security, previous known as Atomic Secure Linux, and have started getting the following error whenever we restart any service. ** (pkttyagent:112415): WARNING **: 12:49:43.934: Unable to register authentication agent: GDBus.Error:org.freedesktop.PolicyKit1.Error.Failed: Cannot determine user of subject Error…

theshell
January 7, 2021

Uncategorized

upstream timed out (110: Connection timed out) while reading response header from upstream, client: X.X.X.X | 504 Gateway Timeout

This error indicates that there is a problem with communication between the Nginx server and the backend server it is proxying to. upstream timed out (110: Connection timed out) while reading response header from upstream, client: X.X.X.X | 504 Gateway…

theshell
December 15, 2020

General Linux

GoAccess – Missing development files for the GeoIP library

GoAccess is a web log viewer and analyzer, it also parses logs in realtime. This comes specially handy when you need to understand the traffic your server is getting. While installing GoAccess on a new server we got the following…

theshell
November 12, 2020

General Linux

How to convert CER to PFX | SSL Certificates

We recently had to deploy a wildcard SSL certificate to an Microsoft Azure web app. The company we buy our certs from, issues them in .crt format by default, we have to convert them to .pfx ourselves. This isn’t a…

theshell
November 5, 2020

MySQL

MySQL / MariaDB: Disable strict mode | Upgrading to MariaDB 10.2

We recently needed to upgrade a server from MySQL 5.7 to MariaDB 10.3 and one of the key steps in doing so is to disable strict mode after the upgrade. By default, MariaDB enables strict mode from version 10.2 and…

theshell
October 14, 2020

Uncategorized

Requires: kernel(posix_acl_valid) = 0x7add44b5

We got this error when trying to install ZFS on a server recently: Error: Package: kmod-zfs-0.7.13-1.el7_6.x86_64 (zfs-kmod) Requires: kernel(posix_acl_valid) = 0x7add44b5 Installed: kernel-3.10.0-1127.19.1.el7.x86_64 (@updates) kernel(posix_acl_valid) = 0xc89bfa92 Available: kernel-3.10.0-1127.el7.x86_64 (base) kernel(posix_acl_valid) = 0xc89bfa92 Available: kernel-3.10.0-1127.8.2.el7.x86_64 (updates) kernel(posix_acl_valid) = 0xc89bfa92 Available:…

theshell
October 7, 2020

CentOS

configure: error: could not find required sqlite3 library

We were faced with this error while trying to install vnstat from source on one of our servers. checking for sqlite3_prepare_v2 in -lsqlite3… no configure: error: could not find required sqlite3 library As to what this error is about, well…

theshell
September 24, 2020

MySQL

View ‘sys.host_summary’ references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them

check mysql / mariadb table for primary key

We’re running cPanel with MariaDB 10.2 on one of our servers and during a complete database dump we ran into this error: mysqldump: Got error: 1356: “View ‘sys.host_summary’ references invalid table(s) or column(s) or function(s) or definer/invoker of view lack…

theshell
September 17, 2020

Uncategorized

Directory Listing for URL https://abc.com/icons is always enabled / always showing

A security scan on one of our servers recently revealed that directory listing was enabled for a particular URL: abc.com We have configured our webservers to globally disable directory listing so this stumped us. We revisited our Apache httpd.conf, tweaked…

theshell
September 4, 2020

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