The following signatures were invalid: EXPKEYSIG B188E2B695BD4743 DEB.SURY.ORG Automatic Signing Key

signatures were invalid: EXPKEYSIG B188E2B695BD4743

How to fix Debian 9 apt-get update error: The following signatures were invalid: EXPKEYSIG B188E2B695BD4743 DEB.SURY.ORG Automatic Signing Key To fix error we need download and install new SURI repository key: # wget -O /etc/apt/trusted.gpg.d/php.gpg https://packages.sury.org/php/apt.gpg And try re-run update:… Continue Reading

Server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none

server certificate verification failed debian

How to fix error in Debian Linux: server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none Try to reinstall certificates: # apt-get install –reinstall ca-certificates Then add root certificates: sudo mkdir /usr/local/share/ca-certificates/cacert.orgsudo wget -P /usr/local/share/ca-certificates/cacert.org http://www.cacert.org/certs/root.crt http://www.cacert.org/certs/class3.crtsudo update-ca-certificates Fix wget ERROR:… Continue Reading

5 Great Commands to Monitor Network Bandwidth

Commands to Monitor Network Bandwidth

5 Great Commands to Monitor Network Bandwidth on Linux Server   Linux network traffic monitoring is one of the main parts of Linux troubleshooting. And can be done by many network monitoring utilities. In this article we will discover 5… Continue Reading