debian linux HowTo - Linux / Unix Q & A from nixCraft

How to upgrade Debian 9 to Debian 10 Buster using the CLI

last updated May 27, 2020 in Debian / Ubuntu, Linux, Package Management

I have Debian 9.x installed on AWS EC2. How do I upgrade Debian 9 Stretch to Debian 10 Buster using the apt command/apt-get command CLI? How can I upgrade Debian 9 to Debian 10 using ssh client?

Linux Change Password Using passwd Command Over SSH

last updated January 7, 2018 in Commands, Linux, OpenBSD, UNIX

I‘m a new Ubutnu Linux user. I backup files to our corporate Unix backup server using the rsync command. The server only allow to upload/download files. I am unable to login to the server. How do change my password using the passwd command over ssh based session?

Linux: Find Number of CPU Cores Command

last updated May 7, 2015 in Hardware, Linux

How do I find out the number of CPU cores available under HP x86_64 Linux serer running on RHEL / Debian Linux 6.x?

Debian Linux (Squeeze) Install Firefox 4

last updated May 29, 2011 in Debian / Ubuntu

My Debian Linux 6 (64 bit) has Epiphany installed which is the GNOME web browser. Epiphany aims to be simple to use and standards compliant but I want all other Firefox extensions. How do I install the latest version of Firefox 4 under Debian Linux version 6?

Linux Configure Sendmail as SMTP Mail Client ( submission MTA )

last updated July 24, 2009 in CentOS, Debian / Ubuntu, EMail Servers, Fedora Linux, Linux, Networking, RedHat and Friends, Sendmail, Suse, Ubuntu Linux, UNIX

I‘ve central e-mail server. Other servers does not need to operate as a mail server. How do I configure Sendmail as submission-only e-mail server (mail client) under CentOS / Fedora / RHEL / Debian Linux / UNIX like operating systems?

Ubuntu Linux: Clean aptitude Cache Command

last updated May 27, 2010 in Ubuntu Linux

How do I clean the aptitude command cache under Ubuntu or Debian Linux?

Debian / Ubuntu Linux Install Advanced Intrusion Detection Environment (AIDE) Software

last updated May 18, 2009 in Debian / Ubuntu, FAQ, Linux, Troubleshooting, Ubuntu Linux

AIDE is an open source host-based intrusion detection system which is a replacement for the well-known Tripwire integrity checker. It provide software integrity checking and it can detect that intrusions (monitor filesystem for unauthorized change such as find out if system binaries modified and a new cracked versions installed or not) have occurred on the system. How do I install and configure AIDE under Ubuntu LTS / Debian Linux 5.0 server?