dpkg command HowTo - Linux / Unix Q & A from nixCraft

How to get list of installed packages on Ubuntu / Debian Linux

last updated February 9, 2017 in Debian / Ubuntu, Linux, Package Management, Ubuntu Linux

I am a new Ubuntu Linux sysadmin. How do I get a list of all installed packages on server1 and install those on server2? How to list all installed packages using apt-get command on Ubuntu or Debian server?

How to find out when Debian or Ubuntu package installed or updated

last updated November 14, 2019 in Debian / Ubuntu, Linux, Package Management

How do I find and list installed Debian or Ubuntu Linux packages date? How can I see when packages got updated on my systems?

Debian / Ubuntu Linux Delete Old Kernel Images Command

last updated December 1, 2019 in Debian / Ubuntu, Linux, Package Management, Troubleshooting, Ubuntu Linux

I‘m a new Ubuntu Linux user and noticed that old kernel still exists in my system. Why doesn’t Ubuntu remove old kernels automatically? How do I delete old unused kernel images to free disk space. How to remove unused old kernel images on Ubuntu Linux safely?

Ubuntu Linux: Install Google Chrome Browser Command

last updated October 2, 2017 in Package Management, Ubuntu Linux

I am unable to find Google Chrome Browser in Ubuntu software center. How do I install Google Chrome in Ubuntu version 12.04 LTS or v13.04 using command line options?

Debian / Ubuntu: Find Information ( Description ) About Installed Packages

last updated October 28, 2012 in Debian / Ubuntu

I‘m looking for equivalent of yum info httpd command under Debian Linux. How do I display information about the installed packages on the command line under Debian or Ubuntu Linux? How do I see the description of a package under Debian or Ubuntu Linux using command line options?

Linux Find Out What Compilers Are Installed or Available On The System

last updated December 11, 2017 in Linux

How do I find out what compilers are installed on a Debian / Ubuntu / Red hat Enterprise / CentOS Linux operating systems? How do I list all available compiler packages under a Linux operating system using the CLI?

Debian / Ubuntu Linux apt-get: Blacklist a Package From Installing

last updated September 29, 2012 in Debian / Ubuntu

I‘ve build my own lighttpd .deb package and I do not want to upgrade it using the apt-get command. Also, I do not want to upgrade a few more packages such as php5-cgi, httpd and so on. How do I blacklist a package or packages so that when I run apt-get upgrade, it will ignore blacklisted packages and install the rest of updates under Debian or Ubuntu Linux server system?