Linux search installed packages

How To List Installed Packages In Ubuntu, Debian, Kali, Mint

Ubuntu, Debian, Kali and Mint distributions uses apt-get and dpkg commands for package management. We generally use this commands to install or remove packages from Linux systems. But in some cases we may need to list and count installed packages. In this tutorial we will look how to list and count all ready installed packages in Ubuntu, Debian, Kali and Mint.

List Installed Packages and Details with dpkg

We will start with dpkg package manager in order to list installed packages. We will use -l option which will list installed packages with their details. The detailed will provide following information.

List Installed Packages and Details with dpkg

• name the package name
• Version the package version number
• Architecture the package cpu architecture
• Description brief information about package

List Installed Packages Names Only with dpkg-query

As we have seen previous example dpkg will list a lot of information. But this will be problem in some cases and we will need only the package name. We can use dpkg-query to only list package names. We also provide some regex for this like below.

List Installed Packages Names Only with dpkg-query

List Installed Packages Names Only with dpkg

We can also list only installed package names with dpkg too. We will use —get-selections option and some grep to remove lines those contains deinstall like below.

List Installed Packages Names Only with dpkg

List Installed Packages and Details with apt-get or apt

We can also use apt or apt-get inorder to list installed packages and their details. In this example we will use apt and list command by providing —installed parameter to list installed packages.

List Installed Packages and Details with apt-get or apt

Count Installed Packages with dpkg

We can also count installed packages by simply using wc command. In this example we will list installed package count with dpkg command.

Count Installed Packages with dpkg

Count Installed Packages with apt-get

We can also use apt and apt-get for installed package counting like below.

Search and Filter In Installed Packages with dpkg and grep

What if we are looking for a specific package and want to list wheter it is installed or not. We can search or filter installed packages with dpkg and grep .

Search and Filter In Installed Packages with apt and grep

We can filter installed packages with apt or apt-get and grep too.

Search and Filter In Installed Packages with apt and grep

Save Installed Packages List To A File

As a system administrator we generally need to migrate, clone or setup similar systems with required packages. We can get list of installed packages and install them another system easily. We save installed package names to a file like below.

Install Packages From List File with dpkg

We can restore given file which contains package names we want to install like below. We will use —set-selections .

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How do I see what packages are installed on Ubuntu Linux?

I am a new Ubuntu Linux server user. My server hosted at Google cloud VM. How do I see what packages are installed on Ubuntu Linux?

Introduction: Ubuntu Linux is an open source operating system based upon the Linux kernel and GNU command line utilities. Ubuntu Linux is extremely popular among new Linux users as well as developers all around the globe. This page shows how to list all installed packages with apt command or apt-get command on Ubuntu Linux.

Tutorial details
Difficulty level	Easy
Root privileges	Yes
Requirements	Debian or Ubuntu Linux
Est. reading time	5 minutes

You need to use the apt or apt-get or dpkg command to list all installed packages on an Ubuntu Linux server from the bash shell prompt.

How do I see what packages are installed on Ubuntu Linux?

The procedure to list what packages are installed on Ubuntu:

1. Open the terminal application or log in to the remote server using ssh (e.g. ssh user @ sever-name )
2. Run command apt list —installed to list all installed packages on Ubuntu
3. To display a list of packages satisfying certain criteria such as show matching apache2 packages, run apt list apache

Let us see some examples about how to list installed packages on Ubuntu and Debian Linux operating systems.

apt list installed packages

Let us list all software packages on Ubuntu Linux available for us:
$ apt list

You might want to use the grep command/egrep command to filter out:
$ apt list | grep nginx
OR
$ apt list | more
However, you may see message on screen that read as follows:

WARNING: apt does not have a stable CLI interface. Use with caution in scripts.

To avoid this message use the dpkg command as follows:
$ dpkg —list | grep nginx
$ dpkg —list | more

List all installed packages only

The apt command displays both installed and packages available to install. What if you want to list currently installed software only? Fear not, pass the option to the apt command:
$ apt list —installed

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How to list or find out if a specific package installed or not

Run package policy as follows:
$ apt list -a pkgNameHere
Is sudo package installed?
$ apt list -a sudo
Is sudo package mariadb-server?
$ apt list -a mariadb-server

Ubuntu list installed packages

It is also possible to list installed packages matching given pattern. The syntax is:
dpkg -l pattern
dpkg —list pattern
apt list pattern
apt list —installed pattern
For example:
dpkg —list ‘x*’
Sample outputs:

• ii – Indicates that package named xauth installed.
• un – Indicates that package not installed or in Unknown status.

Listing installed packages sorted by installation date and time

There is no simple command, but we can use the combination of zgrep and other commands as follows. Let us count it:

Total installed packages on nixcraft-wks01 : 6433
List them:
zgrep » installed » /var/log/dpkg.log*

Please note that zgrep will search possibly compressed files for a regular expression as those log files are compressed by system. Hence, we need to use various z commands on Linux. See “How to find out when Debian or Ubuntu package installed or updated” for more info.

Conclusion

You learned how to list both installed and uninstalled packages on an Ubuntu Linux server or desktop using the CLI method. See the following man pages using the man command:
man apt
man apt-get
man dpkg

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How to List Installed Packages on Ubuntu and Debian-based Linux Distributions

Last updated August 23, 2021 By Abhishek Prakash 20 Comments

So you installed Ubuntu and started using it extensively. Somewhere down the line, you are bound to lose the track of the software that you had installed over the time .

That’s perfectly normal. No one expects you to remember all the packages installed on your system. But the question arises, how to know what packages have been installed? How to see the installed packages?

To list all the installed packages using apt:

apt list –installed

Read the rest of the tutorial to know more about other ways and some more tips to fine tune your search for installed packages.

List installed packages in Ubuntu and Debian

If you use apt command extensively, you would probably expect a command like apt list installed packages. You are not entirely wrong here.

While apt-get command doesn’t have a straightforward option like apt-get list installed packages, apt has a command for this.

This will list all the packages that have been installed using apt. It will also list the packages that were installed as a dependency. Which means that not only you’ll have the applications you installed, you’ll also have a huge list of libraries and other packages that you didn’t install directly.

Check whether a specific package is installed in Ubuntu

Since the list of installed packages is a huge one, it would be a better idea to use grep and filter the output for a certain package.

A better way is to use this command:

Both q options are for quiet mode. And this way, it only looks for programs that are installed.

Note that the above method also lists the applications installed with .deb files. That’s cool, isn’t it?

Other ways to check installed packages in Ubuntu/Debian

If you have read my apt vs apt-get comparison article, you probably already know that both apt and apt-get basically use dpkg . This means you can use dpkg command to list all the installed packages in Debian.

You can filter the output with grep again to search for a specific package.

So far, you have dealt with applications installed with Debian’s package manager. What about Snap and Flatpak applications? How to list them because they are not accessible with apt and dpkg?

To show all the Snap packages installed on your system, use this command:

Snap list also indicates which applications are from a verified publisher with a green tick.

To list all the Flatpak packages installed on your system, use this:

Let me summarize it for you.

To list packages using apt command:

apt list –installed

To list packages using dpkg command:

dpkg -query -l

To list Snap packages installed on your system:

snap list

To list Flatpak packages installed on your system:

flatpak list

List the recently installed packages

So far you saw the list of installed packages in alphabetical order. What if you want to see the packages that have been installed recently?

Thankfully, a Linux system keeps a log of everything that happens in your system. You can refer to the logs to see the recently installed packages.

There are a couple of ways to do this. You can either use the dpkg command’s log or the apt command’s log.

You’ll have to use grep command to filter the result to list the installed packages only.

This will list all the packages including the dependencies that were installed recently on your system along with the time of installation.

You can also use the history of apt command. This will show only the programs that you installed using apt command. It won’t show the dependencies installed with it, though the details are present in the logs. Sometimes, you just want to see that, right?

The output should be something like this:

The history log of apt is quite useful because it shows the time when the apt command was run, the user who ran the command and the packages that were installed by a command.

Bonus Tip: Show installed applications in Software Center

If you are not comfortable with the terminal and the commands, you still has a way to see the applications installed on your system.

You can open the Software Center and click on the Installed tab. You’ll see the list of applications that have been installed on your system.

It won’t show the libraries and other command line stuff though but perhaps you don’t want to see that as you are more GUI centric. Otherwise, you can always use the Synaptic Package Manager.

That’s it

I hope this quick little tutorial helped you to see the list of installed packages on Ubuntu and Debian based distributions.

If you have questions or suggestions to improve this article, please leave a comment below.

Like what you read? Please share it with others.

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Apt-Get List Installed Packages | List Installed With Apt on Ubuntu

Apt-Get List Installed – step by step tutorial. Apt is a command-line interface that allows you to perform actions such as installing new software packages, removing unnecessary software packages, updating the existing software packages, searching for specific software packages etc. on a Linux VPS running Debian as an operating system or Debian-based Linux distributions like Ubuntu. In this tutorial, we will show you how to list all installed packages with apt on Ubuntu (show all installed software on your VPS).

Table of Contents

1. List the installed software packages on Ubuntu

First of all, connect to your Linux server via SSH. To list the installed software packages on your machine you can use the following command:

The output of the command will be very similar to the following one, depending on which packages are currently installed:

2. Use the LESS program

To easily read the entire output you can use the less program.

3. Use the GREP Command

You can look for a specific package through the output using the grep program.

4. List all packages that include Apache

The output from the above command will list all packages that include apache in their names.

Apt supports patterns to match package names and options to list installed (—installed) packages, upgradeable (—upgradeable) packages or all available (—all-versions) package versions.

5. Use the DPKG program

Another alternative that you can use to list the installed software packages on your Ubuntu VPS is the dpkg command.

The output of the command will provide you with information such as the name of the package, version, architecture, and a short description of the package. Of course, you can use the grep program again to search for a specific package.

The output should look like the one below:

With the competition of this tutorial, you have successfully learned how to list installed packages in Ubuntu.

If you’d like to list all installed packages on your CentOS VPS, then check our yum tutorial.

Of course, you don’t have to list all Installed packages with apt on Ubuntu if you use one of our Managed Linux Hosting services, in which case you can simply ask our expert Linux admins to list all installed packages with apt on Ubuntu and export it for you. They are available 24/7 and will take care of your request immediately.

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