Linux Filesystem Error: Transaction failed when using LXD

I am a big fan of LXD, a next-generation Linux system container manager and default on Ubuntu. It allows me to run desktop apps or server apps in an isolated environment. Ubuntu provides LXD with robust security in mind. However, this might lead to undesired side effects, such as individual packages under OpenSUSE or CentOS Linux may not be updated. One such package is the filesystem package. Let us see how to fix Error: Transaction failed when you try to update filesystem package under CentOS, OpenSUSE, and other Linux containers running under LXD.

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ERROR: Test failed: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1091)

When I install s3cmd package on my FreeBSD system and try to use the s3cmd command I get the following error:
    ERROR: Test failed: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1091)
How do I fix this problem on FreeBSD Unix system?

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Nginx upstream sent too big header while reading response header from upstream

I am getting the following error and my app stops working:
    2020/07/12 14:32:03 [error] 45625#45625: *10918 upstream sent too big header while reading response header from upstream, client: 139.xxx.yyy.zzz, server: www.nixcraft.com, request: "POST /app/mg/posts HTTP/2.0", upstream: "fastcgi://unix:/run/php/php-fpm.sock:", host: "www.nixcraft.com", referrer: "https://www.nixcraft.com/mg/admin/index.app"
How do I fix this error for Nginx web server running on Linux or Unix-like systems?

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Systemd systemctl list all failed units/services on Linux

Is there is a command to print list all failed units or services when using systemd on Linux? Can you tell me the systemctl command to show failed services on Linux?

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Remove Santa Hat in VLC Player Permanently

How do I remove Santa Hat in VLC media player that displayed during Christmas time during 18th December to 1st January?

The post Remove Santa Hat in VLC Player Permanently appeared first on nixCraft.

How to test and validate DNSSEC using dig command line

How do I test and validate DNSSEC using the dig command line under Linux, macOS, *BSD, and Unix-like systems?

The post How to test and validate DNSSEC using dig command line appeared first on nixCraft.

How to check hard drive health on FreeBSD

How do I read my hard disk/SSD health using smartctl command on FreeBSD operating system? How can I hard drive health on FreeBSD and find out if my disk is dying?

The post How to check hard drive health on FreeBSD appeared first on nixCraft.

Perl: warning: Setting locale failed in Debian and Ubuntu

I am trying to install package and doing some other work. But, getting the error that read as "perl: warning: Setting locale failed. perl: warning: Please check that your locale settings:" How do I fix this problem on my Debian Linux server?

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FreeBSD wget cannot verify certificate, issued by Let’s Encrypt

I installed GNU wget utility on FreeBSD as explained here. However, whenever I use the wget command to download stuff from the Internet, it says:
   ERROR: cannot verify download.freebsd.org's certificate, issued by 'CN=Let\'s Encrypt Authority X3,O=Let\'s Encrypt,C=US':
    Unable to locally verify the issuer's authority.
How do I fix this problem on FreeBSD 12?

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