Ubuntu

How to check mailserver ssl certificate and expiration date
How to install multiple PHP versions on VestaCP
Installing Docker on Ubuntu-18.04!
how to delete all msg in the postfix queue
How to Disable / Enable service in Zimbra Mail Server
How to clear Zimbra mailbox
11 netstat usage examples
Clear Systemd Journal Logs in Ubuntu 20.04
debian / ubuntu dig command not found
How to fix ‘add-apt-repository command not found’ Error on Ubuntu and Debian
how to setup proxy for apt in ubuntu / debian
zmstat high cpu usage and huge file zmstat.out
how to setup source based (policy based) routing on debian / ubuntu
debian / ubuntu dig command not found
howto use netplan in ubuntu 20.04 with 2 lan interfaces + policy based routing
how to Renew Let’sencrypt certificate on Carbonio CE
carbonio export all addresses
basic csf commands
how to setup proxy for apt in ubuntu / debian